diff --git a/application/src/main/java/org/thingsboard/server/controller/AdminController.java b/application/src/main/java/org/thingsboard/server/controller/AdminController.java
index 8436463afb..5f47bcde2c 100644
--- a/application/src/main/java/org/thingsboard/server/controller/AdminController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/AdminController.java
@@ -96,16 +96,12 @@ public class AdminController extends BaseController {
     public AdminSettings getAdminSettings(
             @ApiParam(value = "A string value of the key (e.g. 'general' or 'mail').")
             @PathVariable("key") String key) throws ThingsboardException {
-        try {
-            accessControlService.checkPermission(getCurrentUser(), Resource.ADMIN_SETTINGS, Operation.READ);
-            AdminSettings adminSettings = checkNotNull(adminSettingsService.findAdminSettingsByKey(TenantId.SYS_TENANT_ID, key), "No Administration settings found for key: " + key);
-            if (adminSettings.getKey().equals("mail")) {
-                ((ObjectNode) adminSettings.getJsonValue()).remove("password");
-            }
-            return adminSettings;
-        } catch (Exception e) {
-            throw handleException(e);
+        accessControlService.checkPermission(getCurrentUser(), Resource.ADMIN_SETTINGS, Operation.READ);
+        AdminSettings adminSettings = checkNotNull(adminSettingsService.findAdminSettingsByKey(TenantId.SYS_TENANT_ID, key), "No Administration settings found for key: " + key);
+        if (adminSettings.getKey().equals("mail")) {
+            ((ObjectNode) adminSettings.getJsonValue()).remove("password");
         }
+        return adminSettings;
     }
 
     @ApiOperation(value = "Get the Administration Settings object using key (getAdminSettings)",
@@ -118,20 +114,16 @@ public class AdminController extends BaseController {
     public AdminSettings saveAdminSettings(
             @ApiParam(value = "A JSON value representing the Administration Settings.")
             @RequestBody AdminSettings adminSettings) throws ThingsboardException {
-        try {
-            accessControlService.checkPermission(getCurrentUser(), Resource.ADMIN_SETTINGS, Operation.WRITE);
-            adminSettings.setTenantId(getTenantId());
-            adminSettings = checkNotNull(adminSettingsService.saveAdminSettings(TenantId.SYS_TENANT_ID, adminSettings));
-            if (adminSettings.getKey().equals("mail")) {
-                mailService.updateMailConfiguration();
-                ((ObjectNode) adminSettings.getJsonValue()).remove("password");
-            } else if (adminSettings.getKey().equals("sms")) {
-                smsService.updateSmsConfiguration();
-            }
-            return adminSettings;
-        } catch (Exception e) {
-            throw handleException(e);
+        accessControlService.checkPermission(getCurrentUser(), Resource.ADMIN_SETTINGS, Operation.WRITE);
+        adminSettings.setTenantId(getTenantId());
+        adminSettings = checkNotNull(adminSettingsService.saveAdminSettings(TenantId.SYS_TENANT_ID, adminSettings));
+        if (adminSettings.getKey().equals("mail")) {
+            mailService.updateMailConfiguration();
+            ((ObjectNode) adminSettings.getJsonValue()).remove("password");
+        } else if (adminSettings.getKey().equals("sms")) {
+            smsService.updateSmsConfiguration();
         }
+        return adminSettings;
     }
 
     @ApiOperation(value = "Get the Security Settings object",
@@ -140,12 +132,8 @@ public class AdminController extends BaseController {
     @RequestMapping(value = "/securitySettings", method = RequestMethod.GET)
     @ResponseBody
     public SecuritySettings getSecuritySettings() throws ThingsboardException {
-        try {
-            accessControlService.checkPermission(getCurrentUser(), Resource.ADMIN_SETTINGS, Operation.READ);
-            return checkNotNull(systemSecurityService.getSecuritySettings(TenantId.SYS_TENANT_ID));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        accessControlService.checkPermission(getCurrentUser(), Resource.ADMIN_SETTINGS, Operation.READ);
+        return checkNotNull(systemSecurityService.getSecuritySettings(TenantId.SYS_TENANT_ID));
     }
 
     @ApiOperation(value = "Update Security Settings (saveSecuritySettings)",
@@ -156,13 +144,9 @@ public class AdminController extends BaseController {
     public SecuritySettings saveSecuritySettings(
             @ApiParam(value = "A JSON value representing the Security Settings.")
             @RequestBody SecuritySettings securitySettings) throws ThingsboardException {
-        try {
-            accessControlService.checkPermission(getCurrentUser(), Resource.ADMIN_SETTINGS, Operation.WRITE);
-            securitySettings = checkNotNull(systemSecurityService.saveSecuritySettings(TenantId.SYS_TENANT_ID, securitySettings));
-            return securitySettings;
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        accessControlService.checkPermission(getCurrentUser(), Resource.ADMIN_SETTINGS, Operation.WRITE);
+        securitySettings = checkNotNull(systemSecurityService.saveSecuritySettings(TenantId.SYS_TENANT_ID, securitySettings));
+        return securitySettings;
     }
 
     @ApiOperation(value = "Get the JWT Settings object (getJwtSettings)",
@@ -172,12 +156,8 @@ public class AdminController extends BaseController {
     @RequestMapping(value = "/jwtSettings", method = RequestMethod.GET)
     @ResponseBody
     public JwtSettings getJwtSettings() throws ThingsboardException {
-        try {
-            accessControlService.checkPermission(getCurrentUser(), Resource.ADMIN_SETTINGS, Operation.READ);
-            return checkNotNull(jwtSettingsService.getJwtSettings());
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        accessControlService.checkPermission(getCurrentUser(), Resource.ADMIN_SETTINGS, Operation.READ);
+        return checkNotNull(jwtSettingsService.getJwtSettings());
     }
 
     @ApiOperation(value = "Update JWT Settings (saveJwtSettings)",
@@ -189,14 +169,10 @@ public class AdminController extends BaseController {
     public JwtPair saveJwtSettings(
             @ApiParam(value = "A JSON value representing the JWT Settings.")
             @RequestBody JwtSettings jwtSettings) throws ThingsboardException {
-        try {
-            SecurityUser securityUser = getCurrentUser();
-            accessControlService.checkPermission(securityUser, Resource.ADMIN_SETTINGS, Operation.WRITE);
-            checkNotNull(jwtSettingsService.saveJwtSettings(jwtSettings));
-            return tokenFactory.createTokenPair(securityUser);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        SecurityUser securityUser = getCurrentUser();
+        accessControlService.checkPermission(securityUser, Resource.ADMIN_SETTINGS, Operation.WRITE);
+        checkNotNull(jwtSettingsService.saveJwtSettings(jwtSettings));
+        return tokenFactory.createTokenPair(securityUser);
     }
 
     @ApiOperation(value = "Send test email (sendTestMail)",
@@ -207,19 +183,15 @@ public class AdminController extends BaseController {
     public void sendTestMail(
             @ApiParam(value = "A JSON value representing the Mail Settings.")
             @RequestBody AdminSettings adminSettings) throws ThingsboardException {
-        try {
-            accessControlService.checkPermission(getCurrentUser(), Resource.ADMIN_SETTINGS, Operation.READ);
-            adminSettings = checkNotNull(adminSettings);
-            if (adminSettings.getKey().equals("mail")) {
-                if (!adminSettings.getJsonValue().has("password")) {
-                    AdminSettings mailSettings = checkNotNull(adminSettingsService.findAdminSettingsByKey(TenantId.SYS_TENANT_ID, "mail"));
-                    ((ObjectNode) adminSettings.getJsonValue()).put("password", mailSettings.getJsonValue().get("password").asText());
-                }
-                String email = getCurrentUser().getEmail();
-                mailService.sendTestMail(adminSettings.getJsonValue(), email);
+        accessControlService.checkPermission(getCurrentUser(), Resource.ADMIN_SETTINGS, Operation.READ);
+        adminSettings = checkNotNull(adminSettings);
+        if (adminSettings.getKey().equals("mail")) {
+            if (!adminSettings.getJsonValue().has("password")) {
+                AdminSettings mailSettings = checkNotNull(adminSettingsService.findAdminSettingsByKey(TenantId.SYS_TENANT_ID, "mail"));
+                ((ObjectNode) adminSettings.getJsonValue()).put("password", mailSettings.getJsonValue().get("password").asText());
             }
-        } catch (Exception e) {
-            throw handleException(e);
+            String email = getCurrentUser().getEmail();
+            mailService.sendTestMail(adminSettings.getJsonValue(), email);
         }
     }
 
@@ -231,12 +203,8 @@ public class AdminController extends BaseController {
     public void sendTestSms(
             @ApiParam(value = "A JSON value representing the Test SMS request.")
             @RequestBody TestSmsRequest testSmsRequest) throws ThingsboardException {
-        try {
-            accessControlService.checkPermission(getCurrentUser(), Resource.ADMIN_SETTINGS, Operation.READ);
-            smsService.sendTestSms(testSmsRequest);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        accessControlService.checkPermission(getCurrentUser(), Resource.ADMIN_SETTINGS, Operation.READ);
+        smsService.sendTestSms(testSmsRequest);
     }
 
     @ApiOperation(value = "Get repository settings (getRepositorySettings)",
@@ -244,16 +212,12 @@ public class AdminController extends BaseController {
     @PreAuthorize("hasAuthority('TENANT_ADMIN')")
     @GetMapping("/repositorySettings")
     public RepositorySettings getRepositorySettings() throws ThingsboardException {
-        try {
-            accessControlService.checkPermission(getCurrentUser(), Resource.VERSION_CONTROL, Operation.READ);
-            RepositorySettings versionControlSettings = checkNotNull(versionControlService.getVersionControlSettings(getTenantId()));
-            versionControlSettings.setPassword(null);
-            versionControlSettings.setPrivateKey(null);
-            versionControlSettings.setPrivateKeyPassword(null);
-            return versionControlSettings;
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        accessControlService.checkPermission(getCurrentUser(), Resource.VERSION_CONTROL, Operation.READ);
+        RepositorySettings versionControlSettings = checkNotNull(versionControlService.getVersionControlSettings(getTenantId()));
+        versionControlSettings.setPassword(null);
+        versionControlSettings.setPrivateKey(null);
+        versionControlSettings.setPrivateKeyPassword(null);
+        return versionControlSettings;
     }
 
     @ApiOperation(value = "Check repository settings exists (repositorySettingsExists)",
@@ -261,12 +225,8 @@ public class AdminController extends BaseController {
     @PreAuthorize("hasAuthority('TENANT_ADMIN')")
     @GetMapping("/repositorySettings/exists")
     public Boolean repositorySettingsExists() throws ThingsboardException {
-        try {
-            accessControlService.checkPermission(getCurrentUser(), Resource.VERSION_CONTROL, Operation.READ);
-            return versionControlService.getVersionControlSettings(getTenantId()) != null;
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        accessControlService.checkPermission(getCurrentUser(), Resource.VERSION_CONTROL, Operation.READ);
+        return versionControlService.getVersionControlSettings(getTenantId()) != null;
     }
 
     @PreAuthorize("hasAuthority('TENANT_ADMIN')")
@@ -307,13 +267,9 @@ public class AdminController extends BaseController {
     @PreAuthorize("hasAuthority('TENANT_ADMIN')")
     @RequestMapping(value = "/repositorySettings", method = RequestMethod.DELETE)
     @ResponseStatus(value = HttpStatus.OK)
-    public DeferredResult<Void> deleteRepositorySettings() throws ThingsboardException {
-        try {
-            accessControlService.checkPermission(getCurrentUser(), Resource.VERSION_CONTROL, Operation.DELETE);
-            return wrapFuture(versionControlService.deleteVersionControlSettings(getTenantId()));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+    public DeferredResult<Void> deleteRepositorySettings() throws Exception {
+        accessControlService.checkPermission(getCurrentUser(), Resource.VERSION_CONTROL, Operation.DELETE);
+        return wrapFuture(versionControlService.deleteVersionControlSettings(getTenantId()));
     }
 
     @ApiOperation(value = "Check repository access (checkRepositoryAccess)",
@@ -322,14 +278,10 @@ public class AdminController extends BaseController {
     @RequestMapping(value = "/repositorySettings/checkAccess", method = RequestMethod.POST)
     public DeferredResult<Void> checkRepositoryAccess(
             @ApiParam(value = "A JSON value representing the Repository Settings.")
-            @RequestBody RepositorySettings settings) throws ThingsboardException {
-        try {
-            accessControlService.checkPermission(getCurrentUser(), Resource.VERSION_CONTROL, Operation.READ);
-            settings = checkNotNull(settings);
-            return wrapFuture(versionControlService.checkVersionControlAccess(getTenantId(), settings));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+            @RequestBody RepositorySettings settings) throws Exception {
+        accessControlService.checkPermission(getCurrentUser(), Resource.VERSION_CONTROL, Operation.READ);
+        settings = checkNotNull(settings);
+        return wrapFuture(versionControlService.checkVersionControlAccess(getTenantId(), settings));
     }
 
     @ApiOperation(value = "Get auto commit settings (getAutoCommitSettings)",
@@ -337,12 +289,8 @@ public class AdminController extends BaseController {
     @PreAuthorize("hasAuthority('TENANT_ADMIN')")
     @GetMapping("/autoCommitSettings")
     public AutoCommitSettings getAutoCommitSettings() throws ThingsboardException {
-        try {
-            accessControlService.checkPermission(getCurrentUser(), Resource.VERSION_CONTROL, Operation.READ);
-            return checkNotNull(autoCommitSettingsService.get(getTenantId()));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        accessControlService.checkPermission(getCurrentUser(), Resource.VERSION_CONTROL, Operation.READ);
+        return checkNotNull(autoCommitSettingsService.get(getTenantId()));
     }
 
     @ApiOperation(value = "Check auto commit settings exists (autoCommitSettingsExists)",
@@ -350,12 +298,8 @@ public class AdminController extends BaseController {
     @PreAuthorize("hasAuthority('TENANT_ADMIN')")
     @GetMapping("/autoCommitSettings/exists")
     public Boolean autoCommitSettingsExists() throws ThingsboardException {
-        try {
-            accessControlService.checkPermission(getCurrentUser(), Resource.VERSION_CONTROL, Operation.READ);
-            return autoCommitSettingsService.get(getTenantId()) != null;
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        accessControlService.checkPermission(getCurrentUser(), Resource.VERSION_CONTROL, Operation.READ);
+        return autoCommitSettingsService.get(getTenantId()) != null;
     }
 
     @ApiOperation(value = "Creates or Updates the auto commit settings (saveAutoCommitSettings)",
@@ -374,12 +318,8 @@ public class AdminController extends BaseController {
     @RequestMapping(value = "/autoCommitSettings", method = RequestMethod.DELETE)
     @ResponseStatus(value = HttpStatus.OK)
     public void deleteAutoCommitSettings() throws ThingsboardException {
-        try {
-            accessControlService.checkPermission(getCurrentUser(), Resource.VERSION_CONTROL, Operation.DELETE);
-            autoCommitSettingsService.delete(getTenantId());
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        accessControlService.checkPermission(getCurrentUser(), Resource.VERSION_CONTROL, Operation.DELETE);
+        autoCommitSettingsService.delete(getTenantId());
     }
 
     @ApiOperation(value = "Check for new Platform Releases (checkUpdates)",
@@ -389,11 +329,7 @@ public class AdminController extends BaseController {
     @RequestMapping(value = "/updates", method = RequestMethod.GET)
     @ResponseBody
     public UpdateMessage checkUpdates() throws ThingsboardException {
-        try {
-            return updateService.checkUpdates();
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return updateService.checkUpdates();
     }
 
     @ApiOperation(value = "Get system info (getSystemInfo)",
diff --git a/application/src/main/java/org/thingsboard/server/controller/AlarmController.java b/application/src/main/java/org/thingsboard/server/controller/AlarmController.java
index 54368af0db..c0014cfa87 100644
--- a/application/src/main/java/org/thingsboard/server/controller/AlarmController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/AlarmController.java
@@ -54,6 +54,8 @@ import org.thingsboard.server.service.security.permission.Resource;
 
 import java.util.UUID;
 
+import java.util.concurrent.ExecutionException;
+
 import static org.thingsboard.server.controller.ControllerConstants.ALARM_ID_PARAM_DESCRIPTION;
 import static org.thingsboard.server.controller.ControllerConstants.ALARM_INFO_DESCRIPTION;
 import static org.thingsboard.server.controller.ControllerConstants.ALARM_SORT_PROPERTY_ALLOWABLE_VALUES;
@@ -258,7 +260,7 @@ public class AlarmController extends BaseController {
             @RequestParam(required = false) Long endTime,
             @ApiParam(value = ALARM_QUERY_FETCH_ORIGINATOR_DESCRIPTION)
             @RequestParam(required = false) Boolean fetchOriginator
-    ) throws ThingsboardException {
+    ) throws ThingsboardException, ExecutionException, InterruptedException {
         checkParameter("EntityId", strEntityId);
         checkParameter("EntityType", strEntityType);
         EntityId entityId = EntityIdFactory.getByTypeAndId(strEntityType, strEntityId);
@@ -275,11 +277,7 @@ public class AlarmController extends BaseController {
         }
         TimePageLink pageLink = createTimePageLink(pageSize, page, textSearch, sortProperty, sortOrder, startTime, endTime);
 
-        try {
-            return checkNotNull(alarmService.findAlarms(getCurrentUser().getTenantId(), new AlarmQuery(entityId, pageLink, alarmSearchStatus, alarmStatus, assigneeUserId, fetchOriginator)).get());
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return checkNotNull(alarmService.findAlarms(getCurrentUser().getTenantId(), new AlarmQuery(entityId, pageLink, alarmSearchStatus, alarmStatus, assigneeUserId, fetchOriginator)).get());
     }
 
     @ApiOperation(value = "Get All Alarms (getAllAlarms)",
@@ -314,7 +312,7 @@ public class AlarmController extends BaseController {
             @RequestParam(required = false) Long endTime,
             @ApiParam(value = ALARM_QUERY_FETCH_ORIGINATOR_DESCRIPTION)
             @RequestParam(required = false) Boolean fetchOriginator
-    ) throws ThingsboardException {
+    ) throws ThingsboardException, ExecutionException, InterruptedException {
         AlarmSearchStatus alarmSearchStatus = StringUtils.isEmpty(searchStatus) ? null : AlarmSearchStatus.valueOf(searchStatus);
         AlarmStatus alarmStatus = StringUtils.isEmpty(status) ? null : AlarmStatus.valueOf(status);
         if (alarmSearchStatus != null && alarmStatus != null) {
@@ -327,14 +325,10 @@ public class AlarmController extends BaseController {
         }
         TimePageLink pageLink = createTimePageLink(pageSize, page, textSearch, sortProperty, sortOrder, startTime, endTime);
 
-        try {
-            if (getCurrentUser().isCustomerUser()) {
-                return checkNotNull(alarmService.findCustomerAlarms(getCurrentUser().getTenantId(), getCurrentUser().getCustomerId(), new AlarmQuery(null, pageLink, alarmSearchStatus, alarmStatus, assigneeUserId, fetchOriginator)).get());
-            } else {
-                return checkNotNull(alarmService.findAlarms(getCurrentUser().getTenantId(), new AlarmQuery(null, pageLink, alarmSearchStatus, alarmStatus, assigneeUserId, fetchOriginator)).get());
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        if (getCurrentUser().isCustomerUser()) {
+            return checkNotNull(alarmService.findCustomerAlarms(getCurrentUser().getTenantId(), getCurrentUser().getCustomerId(), new AlarmQuery(null, pageLink, alarmSearchStatus, alarmStatus, assigneeUserId, fetchOriginator)).get());
+        } else {
+            return checkNotNull(alarmService.findAlarms(getCurrentUser().getTenantId(), new AlarmQuery(null, pageLink, alarmSearchStatus, alarmStatus, assigneeUserId, fetchOriginator)).get());
         }
     }
 
@@ -367,11 +361,7 @@ public class AlarmController extends BaseController {
                     "and 'status' can't be specified at the same time!", ThingsboardErrorCode.BAD_REQUEST_PARAMS);
         }
         checkEntityId(entityId, Operation.READ);
-        try {
-            return alarmService.findHighestAlarmSeverity(getCurrentUser().getTenantId(), entityId, alarmSearchStatus, alarmStatus, assigneeId);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return alarmService.findHighestAlarmSeverity(getCurrentUser().getTenantId(), entityId, alarmSearchStatus, alarmStatus, assigneeId);
     }
 
 }
diff --git a/application/src/main/java/org/thingsboard/server/controller/AssetController.java b/application/src/main/java/org/thingsboard/server/controller/AssetController.java
index 7627d9d27b..510fefe305 100644
--- a/application/src/main/java/org/thingsboard/server/controller/AssetController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/AssetController.java
@@ -60,6 +60,7 @@ import org.thingsboard.server.service.security.permission.Resource;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.ExecutionException;
 import java.util.stream.Collectors;
 
 import static org.thingsboard.server.controller.ControllerConstants.ASSET_ID_PARAM_DESCRIPTION;
@@ -108,12 +109,8 @@ public class AssetController extends BaseController {
     public Asset getAssetById(@ApiParam(value = ASSET_ID_PARAM_DESCRIPTION)
                               @PathVariable(ASSET_ID) String strAssetId) throws ThingsboardException {
         checkParameter(ASSET_ID, strAssetId);
-        try {
-            AssetId assetId = new AssetId(toUUID(strAssetId));
-            return checkAssetId(assetId, Operation.READ);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        AssetId assetId = new AssetId(toUUID(strAssetId));
+        return checkAssetId(assetId, Operation.READ);
     }
 
     @ApiOperation(value = "Get Asset Info (getAssetInfoById)",
@@ -127,12 +124,8 @@ public class AssetController extends BaseController {
     public AssetInfo getAssetInfoById(@ApiParam(value = ASSET_ID_PARAM_DESCRIPTION)
                                       @PathVariable(ASSET_ID) String strAssetId) throws ThingsboardException {
         checkParameter(ASSET_ID, strAssetId);
-        try {
-            AssetId assetId = new AssetId(toUUID(strAssetId));
-            return checkAssetInfoId(assetId, Operation.READ);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        AssetId assetId = new AssetId(toUUID(strAssetId));
+        return checkAssetInfoId(assetId, Operation.READ);
     }
 
     @ApiOperation(value = "Create Or Update Asset (saveAsset)",
@@ -228,16 +221,12 @@ public class AssetController extends BaseController {
             @RequestParam(required = false) String sortProperty,
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            if (type != null && type.trim().length() > 0) {
-                return checkNotNull(assetService.findAssetsByTenantIdAndType(tenantId, type, pageLink));
-            } else {
-                return checkNotNull(assetService.findAssetsByTenantId(tenantId, pageLink));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        if (type != null && type.trim().length() > 0) {
+            return checkNotNull(assetService.findAssetsByTenantIdAndType(tenantId, type, pageLink));
+        } else {
+            return checkNotNull(assetService.findAssetsByTenantId(tenantId, pageLink));
         }
     }
 
@@ -262,19 +251,15 @@ public class AssetController extends BaseController {
             @RequestParam(required = false) String sortProperty,
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            if (type != null && type.trim().length() > 0) {
-                return checkNotNull(assetService.findAssetInfosByTenantIdAndType(tenantId, type, pageLink));
-            } else if (assetProfileId != null && assetProfileId.length() > 0) {
-                AssetProfileId profileId = new AssetProfileId(toUUID(assetProfileId));
-                return checkNotNull(assetService.findAssetInfosByTenantIdAndAssetProfileId(tenantId, profileId, pageLink));
-            } else {
-                return checkNotNull(assetService.findAssetInfosByTenantId(tenantId, pageLink));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        if (type != null && type.trim().length() > 0) {
+            return checkNotNull(assetService.findAssetInfosByTenantIdAndType(tenantId, type, pageLink));
+        } else if (assetProfileId != null && assetProfileId.length() > 0) {
+            AssetProfileId profileId = new AssetProfileId(toUUID(assetProfileId));
+            return checkNotNull(assetService.findAssetInfosByTenantIdAndAssetProfileId(tenantId, profileId, pageLink));
+        } else {
+            return checkNotNull(assetService.findAssetInfosByTenantId(tenantId, pageLink));
         }
     }
 
@@ -287,12 +272,8 @@ public class AssetController extends BaseController {
     public Asset getTenantAsset(
             @ApiParam(value = ASSET_NAME_DESCRIPTION)
             @RequestParam String assetName) throws ThingsboardException {
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            return checkNotNull(assetService.findAssetByTenantIdAndName(tenantId, assetName));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        TenantId tenantId = getCurrentUser().getTenantId();
+        return checkNotNull(assetService.findAssetByTenantIdAndName(tenantId, assetName));
     }
 
     @ApiOperation(value = "Get Customer Assets (getCustomerAssets)",
@@ -317,18 +298,14 @@ public class AssetController extends BaseController {
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
         checkParameter("customerId", strCustomerId);
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            CustomerId customerId = new CustomerId(toUUID(strCustomerId));
-            checkCustomerId(customerId, Operation.READ);
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            if (type != null && type.trim().length() > 0) {
-                return checkNotNull(assetService.findAssetsByTenantIdAndCustomerIdAndType(tenantId, customerId, type, pageLink));
-            } else {
-                return checkNotNull(assetService.findAssetsByTenantIdAndCustomerId(tenantId, customerId, pageLink));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        CustomerId customerId = new CustomerId(toUUID(strCustomerId));
+        checkCustomerId(customerId, Operation.READ);
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        if (type != null && type.trim().length() > 0) {
+            return checkNotNull(assetService.findAssetsByTenantIdAndCustomerIdAndType(tenantId, customerId, type, pageLink));
+        } else {
+            return checkNotNull(assetService.findAssetsByTenantIdAndCustomerId(tenantId, customerId, pageLink));
         }
     }
 
@@ -356,21 +333,17 @@ public class AssetController extends BaseController {
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
         checkParameter("customerId", strCustomerId);
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            CustomerId customerId = new CustomerId(toUUID(strCustomerId));
-            checkCustomerId(customerId, Operation.READ);
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            if (type != null && type.trim().length() > 0) {
-                return checkNotNull(assetService.findAssetInfosByTenantIdAndCustomerIdAndType(tenantId, customerId, type, pageLink));
-            } else if (assetProfileId != null && assetProfileId.length() > 0) {
-                AssetProfileId profileId = new AssetProfileId(toUUID(assetProfileId));
-                return checkNotNull(assetService.findAssetInfosByTenantIdAndCustomerIdAndAssetProfileId(tenantId, customerId, profileId, pageLink));
-            } else {
-                return checkNotNull(assetService.findAssetInfosByTenantIdAndCustomerId(tenantId, customerId, pageLink));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        CustomerId customerId = new CustomerId(toUUID(strCustomerId));
+        checkCustomerId(customerId, Operation.READ);
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        if (type != null && type.trim().length() > 0) {
+            return checkNotNull(assetService.findAssetInfosByTenantIdAndCustomerIdAndType(tenantId, customerId, type, pageLink));
+        } else if (assetProfileId != null && assetProfileId.length() > 0) {
+            AssetProfileId profileId = new AssetProfileId(toUUID(assetProfileId));
+            return checkNotNull(assetService.findAssetInfosByTenantIdAndCustomerIdAndAssetProfileId(tenantId, customerId, profileId, pageLink));
+        } else {
+            return checkNotNull(assetService.findAssetInfosByTenantIdAndCustomerId(tenantId, customerId, pageLink));
         }
     }
 
@@ -381,26 +354,22 @@ public class AssetController extends BaseController {
     @ResponseBody
     public List<Asset> getAssetsByIds(
             @ApiParam(value = "A list of assets ids, separated by comma ','")
-            @RequestParam("assetIds") String[] strAssetIds) throws ThingsboardException {
+            @RequestParam("assetIds") String[] strAssetIds) throws ThingsboardException, ExecutionException, InterruptedException {
         checkArrayParameter("assetIds", strAssetIds);
-        try {
-            SecurityUser user = getCurrentUser();
-            TenantId tenantId = user.getTenantId();
-            CustomerId customerId = user.getCustomerId();
-            List<AssetId> assetIds = new ArrayList<>();
-            for (String strAssetId : strAssetIds) {
-                assetIds.add(new AssetId(toUUID(strAssetId)));
-            }
-            ListenableFuture<List<Asset>> assets;
-            if (customerId == null || customerId.isNullUid()) {
-                assets = assetService.findAssetsByTenantIdAndIdsAsync(tenantId, assetIds);
-            } else {
-                assets = assetService.findAssetsByTenantIdCustomerIdAndIdsAsync(tenantId, customerId, assetIds);
-            }
-            return checkNotNull(assets.get());
-        } catch (Exception e) {
-            throw handleException(e);
+        SecurityUser user = getCurrentUser();
+        TenantId tenantId = user.getTenantId();
+        CustomerId customerId = user.getCustomerId();
+        List<AssetId> assetIds = new ArrayList<>();
+        for (String strAssetId : strAssetIds) {
+            assetIds.add(new AssetId(toUUID(strAssetId)));
         }
+        ListenableFuture<List<Asset>> assets;
+        if (customerId == null || customerId.isNullUid()) {
+            assets = assetService.findAssetsByTenantIdAndIdsAsync(tenantId, assetIds);
+        } else {
+            assets = assetService.findAssetsByTenantIdCustomerIdAndIdsAsync(tenantId, customerId, assetIds);
+        }
+        return checkNotNull(assets.get());
     }
 
     @ApiOperation(value = "Find related assets (findByQuery)",
@@ -410,25 +379,21 @@ public class AssetController extends BaseController {
     @PreAuthorize("hasAnyAuthority('TENANT_ADMIN', 'CUSTOMER_USER')")
     @RequestMapping(value = "/assets", method = RequestMethod.POST)
     @ResponseBody
-    public List<Asset> findByQuery(@RequestBody AssetSearchQuery query) throws ThingsboardException {
+    public List<Asset> findByQuery(@RequestBody AssetSearchQuery query) throws ThingsboardException, ExecutionException, InterruptedException {
         checkNotNull(query);
         checkNotNull(query.getParameters());
         checkNotNull(query.getAssetTypes());
         checkEntityId(query.getParameters().getEntityId(), Operation.READ);
-        try {
-            List<Asset> assets = checkNotNull(assetService.findAssetsByQuery(getTenantId(), query).get());
-            assets = assets.stream().filter(asset -> {
-                try {
-                    accessControlService.checkPermission(getCurrentUser(), Resource.ASSET, Operation.READ, asset.getId(), asset);
-                    return true;
-                } catch (ThingsboardException e) {
-                    return false;
-                }
-            }).collect(Collectors.toList());
-            return assets;
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        List<Asset> assets = checkNotNull(assetService.findAssetsByQuery(getTenantId(), query).get());
+        assets = assets.stream().filter(asset -> {
+            try {
+                accessControlService.checkPermission(getCurrentUser(), Resource.ASSET, Operation.READ, asset.getId(), asset);
+                return true;
+            } catch (ThingsboardException e) {
+                return false;
+            }
+        }).collect(Collectors.toList());
+        return assets;
     }
 
     @ApiOperation(value = "Get Asset Types (getAssetTypes)",
@@ -436,15 +401,11 @@ public class AssetController extends BaseController {
     @PreAuthorize("hasAnyAuthority('TENANT_ADMIN', 'CUSTOMER_USER')")
     @RequestMapping(value = "/asset/types", method = RequestMethod.GET)
     @ResponseBody
-    public List<EntitySubtype> getAssetTypes() throws ThingsboardException {
-        try {
-            SecurityUser user = getCurrentUser();
-            TenantId tenantId = user.getTenantId();
-            ListenableFuture<List<EntitySubtype>> assetTypes = assetService.findAssetTypesByTenantId(tenantId);
-            return checkNotNull(assetTypes.get());
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+    public List<EntitySubtype> getAssetTypes() throws ThingsboardException, ExecutionException, InterruptedException {
+        SecurityUser user = getCurrentUser();
+        TenantId tenantId = user.getTenantId();
+        ListenableFuture<List<EntitySubtype>> assetTypes = assetService.findAssetTypesByTenantId(tenantId);
+        return checkNotNull(assetTypes.get());
     }
 
     @ApiOperation(value = "Assign asset to edge (assignAssetToEdge)",
@@ -520,33 +481,29 @@ public class AssetController extends BaseController {
             @ApiParam(value = "Timestamp. Assets with creation time after it won't be queried")
             @RequestParam(required = false) Long endTime) throws ThingsboardException {
         checkParameter(EDGE_ID, strEdgeId);
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
-            checkEdgeId(edgeId, Operation.READ);
-            TimePageLink pageLink = createTimePageLink(pageSize, page, textSearch, sortProperty, sortOrder, startTime, endTime);
-            PageData<Asset> nonFilteredResult;
-            if (type != null && type.trim().length() > 0) {
-                nonFilteredResult = assetService.findAssetsByTenantIdAndEdgeIdAndType(tenantId, edgeId, type, pageLink);
-            } else {
-                nonFilteredResult = assetService.findAssetsByTenantIdAndEdgeId(tenantId, edgeId, pageLink);
-            }
-            List<Asset> filteredAssets = nonFilteredResult.getData().stream().filter(asset -> {
-                try {
-                    accessControlService.checkPermission(getCurrentUser(), Resource.ASSET, Operation.READ, asset.getId(), asset);
-                    return true;
-                } catch (ThingsboardException e) {
-                    return false;
-                }
-            }).collect(Collectors.toList());
-            PageData<Asset> filteredResult = new PageData<>(filteredAssets,
-                    nonFilteredResult.getTotalPages(),
-                    nonFilteredResult.getTotalElements(),
-                    nonFilteredResult.hasNext());
-            return checkNotNull(filteredResult);
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
+        checkEdgeId(edgeId, Operation.READ);
+        TimePageLink pageLink = createTimePageLink(pageSize, page, textSearch, sortProperty, sortOrder, startTime, endTime);
+        PageData<Asset> nonFilteredResult;
+        if (type != null && type.trim().length() > 0) {
+            nonFilteredResult = assetService.findAssetsByTenantIdAndEdgeIdAndType(tenantId, edgeId, type, pageLink);
+        } else {
+            nonFilteredResult = assetService.findAssetsByTenantIdAndEdgeId(tenantId, edgeId, pageLink);
         }
+        List<Asset> filteredAssets = nonFilteredResult.getData().stream().filter(asset -> {
+            try {
+                accessControlService.checkPermission(getCurrentUser(), Resource.ASSET, Operation.READ, asset.getId(), asset);
+                return true;
+            } catch (ThingsboardException e) {
+                return false;
+            }
+        }).collect(Collectors.toList());
+        PageData<Asset> filteredResult = new PageData<>(filteredAssets,
+                nonFilteredResult.getTotalPages(),
+                nonFilteredResult.getTotalElements(),
+                nonFilteredResult.hasNext());
+        return checkNotNull(filteredResult);
     }
 
     @ApiOperation(value = "Import the bulk of assets (processAssetsBulkImport)",
diff --git a/application/src/main/java/org/thingsboard/server/controller/AssetProfileController.java b/application/src/main/java/org/thingsboard/server/controller/AssetProfileController.java
index 6e96f6985b..ebae4169ce 100644
--- a/application/src/main/java/org/thingsboard/server/controller/AssetProfileController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/AssetProfileController.java
@@ -78,12 +78,8 @@ public class AssetProfileController extends BaseController {
             @ApiParam(value = ASSET_PROFILE_ID_PARAM_DESCRIPTION)
             @PathVariable(ASSET_PROFILE_ID) String strAssetProfileId) throws ThingsboardException {
         checkParameter(ASSET_PROFILE_ID, strAssetProfileId);
-        try {
-            AssetProfileId assetProfileId = new AssetProfileId(toUUID(strAssetProfileId));
-            return checkAssetProfileId(assetProfileId, Operation.READ);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        AssetProfileId assetProfileId = new AssetProfileId(toUUID(strAssetProfileId));
+        return checkAssetProfileId(assetProfileId, Operation.READ);
     }
 
     @ApiOperation(value = "Get Asset Profile Info (getAssetProfileInfoById)",
@@ -97,12 +93,8 @@ public class AssetProfileController extends BaseController {
             @ApiParam(value = ASSET_PROFILE_ID_PARAM_DESCRIPTION)
             @PathVariable(ASSET_PROFILE_ID) String strAssetProfileId) throws ThingsboardException {
         checkParameter(ASSET_PROFILE_ID, strAssetProfileId);
-        try {
-            AssetProfileId assetProfileId = new AssetProfileId(toUUID(strAssetProfileId));
-            return new AssetProfileInfo(checkAssetProfileId(assetProfileId, Operation.READ));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        AssetProfileId assetProfileId = new AssetProfileId(toUUID(strAssetProfileId));
+        return new AssetProfileInfo(checkAssetProfileId(assetProfileId, Operation.READ));
     }
 
     @ApiOperation(value = "Get Default Asset Profile (getDefaultAssetProfileInfo)",
@@ -113,11 +105,7 @@ public class AssetProfileController extends BaseController {
     @RequestMapping(value = "/assetProfileInfo/default", method = RequestMethod.GET)
     @ResponseBody
     public AssetProfileInfo getDefaultAssetProfileInfo() throws ThingsboardException {
-        try {
-            return checkNotNull(assetProfileService.findDefaultAssetProfileInfo(getTenantId()));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return checkNotNull(assetProfileService.findDefaultAssetProfileInfo(getTenantId()));
     }
 
     @ApiOperation(value = "Create Or Update Asset Profile (saveAssetProfile)",
@@ -191,12 +179,8 @@ public class AssetProfileController extends BaseController {
             @RequestParam(required = false) String sortProperty,
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            return checkNotNull(assetProfileService.findAssetProfiles(getTenantId(), pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        return checkNotNull(assetProfileService.findAssetProfiles(getTenantId(), pageLink));
     }
 
     @ApiOperation(value = "Get Asset Profile infos (getAssetProfileInfos)",
@@ -217,11 +201,7 @@ public class AssetProfileController extends BaseController {
             @RequestParam(required = false) String sortProperty,
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            return checkNotNull(assetProfileService.findAssetProfileInfos(getTenantId(), pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        return checkNotNull(assetProfileService.findAssetProfileInfos(getTenantId(), pageLink));
     }
 }
diff --git a/application/src/main/java/org/thingsboard/server/controller/AuditLogController.java b/application/src/main/java/org/thingsboard/server/controller/AuditLogController.java
index 805d0209ec..387f0d014b 100644
--- a/application/src/main/java/org/thingsboard/server/controller/AuditLogController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/AuditLogController.java
@@ -97,15 +97,11 @@ public class AuditLogController extends BaseController {
             @RequestParam(required = false) Long endTime,
             @ApiParam(value = AUDIT_LOG_QUERY_ACTION_TYPES_DESCRIPTION)
             @RequestParam(name = "actionTypes", required = false) String actionTypesStr) throws ThingsboardException {
-        try {
-            checkParameter("CustomerId", strCustomerId);
-            TenantId tenantId = getCurrentUser().getTenantId();
-            TimePageLink pageLink = createTimePageLink(pageSize, page, textSearch, sortProperty, sortOrder, startTime, endTime);
-            List<ActionType> actionTypes = parseActionTypesStr(actionTypesStr);
-            return checkNotNull(auditLogService.findAuditLogsByTenantIdAndCustomerId(tenantId, new CustomerId(UUID.fromString(strCustomerId)), actionTypes, pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        checkParameter("CustomerId", strCustomerId);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        TimePageLink pageLink = createTimePageLink(pageSize, page, textSearch, sortProperty, sortOrder, startTime, endTime);
+        List<ActionType> actionTypes = parseActionTypesStr(actionTypesStr);
+        return checkNotNull(auditLogService.findAuditLogsByTenantIdAndCustomerId(tenantId, new CustomerId(UUID.fromString(strCustomerId)), actionTypes, pageLink));
     }
 
     @ApiOperation(value = "Get audit logs by user id (getAuditLogsByUserId)",
@@ -135,15 +131,11 @@ public class AuditLogController extends BaseController {
             @RequestParam(required = false) Long endTime,
             @ApiParam(value = AUDIT_LOG_QUERY_ACTION_TYPES_DESCRIPTION)
             @RequestParam(name = "actionTypes", required = false) String actionTypesStr) throws ThingsboardException {
-        try {
-            checkParameter("UserId", strUserId);
-            TenantId tenantId = getCurrentUser().getTenantId();
-            TimePageLink pageLink = createTimePageLink(pageSize, page, textSearch, sortProperty, sortOrder, startTime, endTime);
-            List<ActionType> actionTypes = parseActionTypesStr(actionTypesStr);
-            return checkNotNull(auditLogService.findAuditLogsByTenantIdAndUserId(tenantId, new UserId(UUID.fromString(strUserId)), actionTypes, pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        checkParameter("UserId", strUserId);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        TimePageLink pageLink = createTimePageLink(pageSize, page, textSearch, sortProperty, sortOrder, startTime, endTime);
+        List<ActionType> actionTypes = parseActionTypesStr(actionTypesStr);
+        return checkNotNull(auditLogService.findAuditLogsByTenantIdAndUserId(tenantId, new UserId(UUID.fromString(strUserId)), actionTypes, pageLink));
     }
 
     @ApiOperation(value = "Get audit logs by entity id (getAuditLogsByEntityId)",
@@ -176,16 +168,12 @@ public class AuditLogController extends BaseController {
             @RequestParam(required = false) Long endTime,
             @ApiParam(value = AUDIT_LOG_QUERY_ACTION_TYPES_DESCRIPTION)
             @RequestParam(name = "actionTypes", required = false) String actionTypesStr) throws ThingsboardException {
-        try {
-            checkParameter("EntityId", strEntityId);
-            checkParameter("EntityType", strEntityType);
-            TenantId tenantId = getCurrentUser().getTenantId();
-            TimePageLink pageLink = createTimePageLink(pageSize, page, textSearch, sortProperty, sortOrder, startTime, endTime);
-            List<ActionType> actionTypes = parseActionTypesStr(actionTypesStr);
-            return checkNotNull(auditLogService.findAuditLogsByTenantIdAndEntityId(tenantId, EntityIdFactory.getByTypeAndId(strEntityType, strEntityId), actionTypes, pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        checkParameter("EntityId", strEntityId);
+        checkParameter("EntityType", strEntityType);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        TimePageLink pageLink = createTimePageLink(pageSize, page, textSearch, sortProperty, sortOrder, startTime, endTime);
+        List<ActionType> actionTypes = parseActionTypesStr(actionTypesStr);
+        return checkNotNull(auditLogService.findAuditLogsByTenantIdAndEntityId(tenantId, EntityIdFactory.getByTypeAndId(strEntityType, strEntityId), actionTypes, pageLink));
     }
 
     @ApiOperation(value = "Get all audit logs (getAuditLogs)",
@@ -212,14 +200,10 @@ public class AuditLogController extends BaseController {
             @RequestParam(required = false) Long endTime,
             @ApiParam(value = AUDIT_LOG_QUERY_ACTION_TYPES_DESCRIPTION)
             @RequestParam(name = "actionTypes", required = false) String actionTypesStr) throws ThingsboardException {
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            List<ActionType> actionTypes = parseActionTypesStr(actionTypesStr);
-            TimePageLink pageLink = createTimePageLink(pageSize, page, textSearch, sortProperty, sortOrder, startTime, endTime);
-            return checkNotNull(auditLogService.findAuditLogsByTenantId(tenantId, actionTypes, pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        TenantId tenantId = getCurrentUser().getTenantId();
+        List<ActionType> actionTypes = parseActionTypesStr(actionTypesStr);
+        TimePageLink pageLink = createTimePageLink(pageSize, page, textSearch, sortProperty, sortOrder, startTime, endTime);
+        return checkNotNull(auditLogService.findAuditLogsByTenantId(tenantId, actionTypes, pageLink));
     }
 
     private List<ActionType> parseActionTypesStr(String actionTypesStr) {
diff --git a/application/src/main/java/org/thingsboard/server/controller/AuthController.java b/application/src/main/java/org/thingsboard/server/controller/AuthController.java
index 113c292380..32b997c21f 100644
--- a/application/src/main/java/org/thingsboard/server/controller/AuthController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/AuthController.java
@@ -92,12 +92,8 @@ public class AuthController extends BaseController {
     @RequestMapping(value = "/auth/user", method = RequestMethod.GET)
     public @ResponseBody
     User getUser() throws ThingsboardException {
-        try {
-            SecurityUser securityUser = getCurrentUser();
-            return userService.findUserById(securityUser.getTenantId(), securityUser.getId());
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        SecurityUser securityUser = getCurrentUser();
+        return userService.findUserById(securityUser.getTenantId(), securityUser.getId());
     }
 
     @ApiOperation(value = "Logout (logout)",
@@ -117,31 +113,27 @@ public class AuthController extends BaseController {
     public ObjectNode changePassword(
             @ApiParam(value = "Change Password Request")
             @RequestBody ChangePasswordRequest changePasswordRequest) throws ThingsboardException {
-        try {
-            String currentPassword = changePasswordRequest.getCurrentPassword();
-            String newPassword = changePasswordRequest.getNewPassword();
-            SecurityUser securityUser = getCurrentUser();
-            UserCredentials userCredentials = userService.findUserCredentialsByUserId(TenantId.SYS_TENANT_ID, securityUser.getId());
-            if (!passwordEncoder.matches(currentPassword, userCredentials.getPassword())) {
-                throw new ThingsboardException("Current password doesn't match!", ThingsboardErrorCode.BAD_REQUEST_PARAMS);
-            }
-            systemSecurityService.validatePassword(securityUser.getTenantId(), newPassword, userCredentials);
-            if (passwordEncoder.matches(newPassword, userCredentials.getPassword())) {
-                throw new ThingsboardException("New password should be different from existing!", ThingsboardErrorCode.BAD_REQUEST_PARAMS);
-            }
-            userCredentials.setPassword(passwordEncoder.encode(newPassword));
-            userService.replaceUserCredentials(securityUser.getTenantId(), userCredentials);
+        String currentPassword = changePasswordRequest.getCurrentPassword();
+        String newPassword = changePasswordRequest.getNewPassword();
+        SecurityUser securityUser = getCurrentUser();
+        UserCredentials userCredentials = userService.findUserCredentialsByUserId(TenantId.SYS_TENANT_ID, securityUser.getId());
+        if (!passwordEncoder.matches(currentPassword, userCredentials.getPassword())) {
+            throw new ThingsboardException("Current password doesn't match!", ThingsboardErrorCode.BAD_REQUEST_PARAMS);
+        }
+        systemSecurityService.validatePassword(securityUser.getTenantId(), newPassword, userCredentials);
+        if (passwordEncoder.matches(newPassword, userCredentials.getPassword())) {
+            throw new ThingsboardException("New password should be different from existing!", ThingsboardErrorCode.BAD_REQUEST_PARAMS);
+        }
+        userCredentials.setPassword(passwordEncoder.encode(newPassword));
+        userService.replaceUserCredentials(securityUser.getTenantId(), userCredentials);
 
-            sendEntityNotificationMsg(getTenantId(), userCredentials.getUserId(), EdgeEventActionType.CREDENTIALS_UPDATED);
+        sendEntityNotificationMsg(getTenantId(), userCredentials.getUserId(), EdgeEventActionType.CREDENTIALS_UPDATED);
 
-            eventPublisher.publishEvent(new UserCredentialsInvalidationEvent(securityUser.getId()));
-            ObjectNode response = JacksonUtil.newObjectNode();
-            response.put("token", tokenFactory.createAccessJwtToken(securityUser).getToken());
-            response.put("refreshToken", tokenFactory.createRefreshToken(securityUser).getToken());
-            return response;
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        eventPublisher.publishEvent(new UserCredentialsInvalidationEvent(securityUser.getId()));
+        ObjectNode response = JacksonUtil.newObjectNode();
+        response.put("token", tokenFactory.createAccessJwtToken(securityUser).getToken());
+        response.put("refreshToken", tokenFactory.createRefreshToken(securityUser).getToken());
+        return response;
     }
 
     @ApiOperation(value = "Get the current User password policy (getUserPasswordPolicy)",
@@ -149,13 +141,9 @@ public class AuthController extends BaseController {
     @RequestMapping(value = "/noauth/userPasswordPolicy", method = RequestMethod.GET)
     @ResponseBody
     public UserPasswordPolicy getUserPasswordPolicy() throws ThingsboardException {
-        try {
-            SecuritySettings securitySettings =
-                    checkNotNull(systemSecurityService.getSecuritySettings(TenantId.SYS_TENANT_ID));
-            return securitySettings.getPasswordPolicy();
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        SecuritySettings securitySettings =
+                checkNotNull(systemSecurityService.getSecuritySettings(TenantId.SYS_TENANT_ID));
+        return securitySettings.getPasswordPolicy();
     }
 
     @ApiOperation(value = "Check Activate User Token (checkActivateToken)",
@@ -255,34 +243,30 @@ public class AuthController extends BaseController {
             @RequestBody ActivateUserRequest activateRequest,
             @RequestParam(required = false, defaultValue = "true") boolean sendActivationMail,
             HttpServletRequest request) throws ThingsboardException {
-        try {
-            String activateToken = activateRequest.getActivateToken();
-            String password = activateRequest.getPassword();
-            systemSecurityService.validatePassword(TenantId.SYS_TENANT_ID, password, null);
-            String encodedPassword = passwordEncoder.encode(password);
-            UserCredentials credentials = userService.activateUserCredentials(TenantId.SYS_TENANT_ID, activateToken, encodedPassword);
-            User user = userService.findUserById(TenantId.SYS_TENANT_ID, credentials.getUserId());
-            UserPrincipal principal = new UserPrincipal(UserPrincipal.Type.USER_NAME, user.getEmail());
-            SecurityUser securityUser = new SecurityUser(user, credentials.isEnabled(), principal);
-            userService.setUserCredentialsEnabled(user.getTenantId(), user.getId(), true);
-            String baseUrl = systemSecurityService.getBaseUrl(user.getTenantId(), user.getCustomerId(), request);
-            String loginUrl = String.format("%s/login", baseUrl);
-            String email = user.getEmail();
+        String activateToken = activateRequest.getActivateToken();
+        String password = activateRequest.getPassword();
+        systemSecurityService.validatePassword(TenantId.SYS_TENANT_ID, password, null);
+        String encodedPassword = passwordEncoder.encode(password);
+        UserCredentials credentials = userService.activateUserCredentials(TenantId.SYS_TENANT_ID, activateToken, encodedPassword);
+        User user = userService.findUserById(TenantId.SYS_TENANT_ID, credentials.getUserId());
+        UserPrincipal principal = new UserPrincipal(UserPrincipal.Type.USER_NAME, user.getEmail());
+        SecurityUser securityUser = new SecurityUser(user, credentials.isEnabled(), principal);
+        userService.setUserCredentialsEnabled(user.getTenantId(), user.getId(), true);
+        String baseUrl = systemSecurityService.getBaseUrl(user.getTenantId(), user.getCustomerId(), request);
+        String loginUrl = String.format("%s/login", baseUrl);
+        String email = user.getEmail();
 
-            if (sendActivationMail) {
-                try {
-                    mailService.sendAccountActivatedEmail(loginUrl, email);
-                } catch (Exception e) {
-                    log.info("Unable to send account activation email [{}]", e.getMessage());
-                }
+        if (sendActivationMail) {
+            try {
+                mailService.sendAccountActivatedEmail(loginUrl, email);
+            } catch (Exception e) {
+                log.info("Unable to send account activation email [{}]", e.getMessage());
             }
+        }
 
-            sendEntityNotificationMsg(user.getTenantId(), user.getId(), EdgeEventActionType.CREDENTIALS_UPDATED);
+        sendEntityNotificationMsg(user.getTenantId(), user.getId(), EdgeEventActionType.CREDENTIALS_UPDATED);
 
-            return tokenFactory.createTokenPair(securityUser);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return tokenFactory.createTokenPair(securityUser);
     }
 
     @ApiOperation(value = "Reset password (resetPassword)",
@@ -296,46 +280,38 @@ public class AuthController extends BaseController {
             @ApiParam(value = "Reset password request.")
             @RequestBody ResetPasswordRequest resetPasswordRequest,
             HttpServletRequest request) throws ThingsboardException {
-        try {
-            String resetToken = resetPasswordRequest.getResetToken();
-            String password = resetPasswordRequest.getPassword();
-            UserCredentials userCredentials = userService.findUserCredentialsByResetToken(TenantId.SYS_TENANT_ID, resetToken);
-            if (userCredentials != null) {
-                systemSecurityService.validatePassword(TenantId.SYS_TENANT_ID, password, userCredentials);
-                if (passwordEncoder.matches(password, userCredentials.getPassword())) {
-                    throw new ThingsboardException("New password should be different from existing!", ThingsboardErrorCode.BAD_REQUEST_PARAMS);
-                }
-                String encodedPassword = passwordEncoder.encode(password);
-                userCredentials.setPassword(encodedPassword);
-                userCredentials.setResetToken(null);
-                userCredentials = userService.replaceUserCredentials(TenantId.SYS_TENANT_ID, userCredentials);
-                User user = userService.findUserById(TenantId.SYS_TENANT_ID, userCredentials.getUserId());
-                UserPrincipal principal = new UserPrincipal(UserPrincipal.Type.USER_NAME, user.getEmail());
-                SecurityUser securityUser = new SecurityUser(user, userCredentials.isEnabled(), principal);
-                String baseUrl = systemSecurityService.getBaseUrl(user.getTenantId(), user.getCustomerId(), request);
-                String loginUrl = String.format("%s/login", baseUrl);
-                String email = user.getEmail();
-                mailService.sendPasswordWasResetEmail(loginUrl, email);
+        String resetToken = resetPasswordRequest.getResetToken();
+        String password = resetPasswordRequest.getPassword();
+        UserCredentials userCredentials = userService.findUserCredentialsByResetToken(TenantId.SYS_TENANT_ID, resetToken);
+        if (userCredentials != null) {
+            systemSecurityService.validatePassword(TenantId.SYS_TENANT_ID, password, userCredentials);
+            if (passwordEncoder.matches(password, userCredentials.getPassword())) {
+                throw new ThingsboardException("New password should be different from existing!", ThingsboardErrorCode.BAD_REQUEST_PARAMS);
+            }
+            String encodedPassword = passwordEncoder.encode(password);
+            userCredentials.setPassword(encodedPassword);
+            userCredentials.setResetToken(null);
+            userCredentials = userService.replaceUserCredentials(TenantId.SYS_TENANT_ID, userCredentials);
+            User user = userService.findUserById(TenantId.SYS_TENANT_ID, userCredentials.getUserId());
+            UserPrincipal principal = new UserPrincipal(UserPrincipal.Type.USER_NAME, user.getEmail());
+            SecurityUser securityUser = new SecurityUser(user, userCredentials.isEnabled(), principal);
+            String baseUrl = systemSecurityService.getBaseUrl(user.getTenantId(), user.getCustomerId(), request);
+            String loginUrl = String.format("%s/login", baseUrl);
+            String email = user.getEmail();
+            mailService.sendPasswordWasResetEmail(loginUrl, email);
 
-                eventPublisher.publishEvent(new UserCredentialsInvalidationEvent(securityUser.getId()));
+            eventPublisher.publishEvent(new UserCredentialsInvalidationEvent(securityUser.getId()));
 
-                return tokenFactory.createTokenPair(securityUser);
-            } else {
-                throw new ThingsboardException("Invalid reset token!", ThingsboardErrorCode.BAD_REQUEST_PARAMS);
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+            return tokenFactory.createTokenPair(securityUser);
+        } else {
+            throw new ThingsboardException("Invalid reset token!", ThingsboardErrorCode.BAD_REQUEST_PARAMS);
         }
     }
 
     private void logLogoutAction(HttpServletRequest request) throws ThingsboardException {
-        try {
-            var user = getCurrentUser();
-            systemSecurityService.logLoginAction(user, new RestAuthenticationDetails(request), ActionType.LOGOUT, null);
-            eventPublisher.publishEvent(new UserSessionInvalidationEvent(user.getSessionId()));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        var user = getCurrentUser();
+        systemSecurityService.logLoginAction(user, new RestAuthenticationDetails(request), ActionType.LOGOUT, null);
+        eventPublisher.publishEvent(new UserSessionInvalidationEvent(user.getSessionId()));
     }
 
     private TbRateLimits getTbRateLimits(UserId userId) {
diff --git a/application/src/main/java/org/thingsboard/server/controller/ComponentDescriptorController.java b/application/src/main/java/org/thingsboard/server/controller/ComponentDescriptorController.java
index 7d461fc764..33a4edfbe0 100644
--- a/application/src/main/java/org/thingsboard/server/controller/ComponentDescriptorController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/ComponentDescriptorController.java
@@ -57,11 +57,7 @@ public class ComponentDescriptorController extends BaseController {
             @ApiParam(value = "Component Descriptor class name", required = true)
             @PathVariable("componentDescriptorClazz") String strComponentDescriptorClazz) throws ThingsboardException {
         checkParameter("strComponentDescriptorClazz", strComponentDescriptorClazz);
-        try {
-            return checkComponentDescriptorByClazz(strComponentDescriptorClazz);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return checkComponentDescriptorByClazz(strComponentDescriptorClazz);
     }
 
     @ApiOperation(value = "Get Component Descriptors (getComponentDescriptorsByType)",
@@ -76,11 +72,7 @@ public class ComponentDescriptorController extends BaseController {
             @ApiParam(value = "Type of the Rule Chain", allowableValues = "CORE,EDGE")
             @RequestParam(value = "ruleChainType", required = false) String strRuleChainType) throws ThingsboardException {
         checkParameter("componentType", strComponentType);
-        try {
-            return checkComponentDescriptorsByType(ComponentType.valueOf(strComponentType), getRuleChainType(strRuleChainType));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return checkComponentDescriptorsByType(ComponentType.valueOf(strComponentType), getRuleChainType(strRuleChainType));
     }
 
     @ApiOperation(value = "Get Component Descriptors (getComponentDescriptorsByTypes)",
@@ -95,15 +87,11 @@ public class ComponentDescriptorController extends BaseController {
             @ApiParam(value = "Type of the Rule Chain", allowableValues = "CORE,EDGE")
             @RequestParam(value = "ruleChainType", required = false) String strRuleChainType) throws ThingsboardException {
         checkArrayParameter("componentTypes", strComponentTypes);
-        try {
-            Set<ComponentType> componentTypes = new HashSet<>();
-            for (String strComponentType : strComponentTypes) {
-                componentTypes.add(ComponentType.valueOf(strComponentType));
-            }
-            return checkComponentDescriptorsByTypes(componentTypes, getRuleChainType(strRuleChainType));
-        } catch (Exception e) {
-            throw handleException(e);
+        Set<ComponentType> componentTypes = new HashSet<>();
+        for (String strComponentType : strComponentTypes) {
+            componentTypes.add(ComponentType.valueOf(strComponentType));
         }
+        return checkComponentDescriptorsByTypes(componentTypes, getRuleChainType(strRuleChainType));
     }
 
     private RuleChainType getRuleChainType(String strRuleChainType) {
diff --git a/application/src/main/java/org/thingsboard/server/controller/CustomerController.java b/application/src/main/java/org/thingsboard/server/controller/CustomerController.java
index ef15199fa8..8156c72a41 100644
--- a/application/src/main/java/org/thingsboard/server/controller/CustomerController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/CustomerController.java
@@ -79,16 +79,12 @@ public class CustomerController extends BaseController {
             @ApiParam(value = CUSTOMER_ID_PARAM_DESCRIPTION)
             @PathVariable(CUSTOMER_ID) String strCustomerId) throws ThingsboardException {
         checkParameter(CUSTOMER_ID, strCustomerId);
-        try {
-            CustomerId customerId = new CustomerId(toUUID(strCustomerId));
-            Customer customer = checkCustomerId(customerId, Operation.READ);
-            if (!customer.getAdditionalInfo().isNull()) {
-                processDashboardIdFromAdditionalInfo((ObjectNode) customer.getAdditionalInfo(), HOME_DASHBOARD);
-            }
-            return customer;
-        } catch (Exception e) {
-            throw handleException(e);
+        CustomerId customerId = new CustomerId(toUUID(strCustomerId));
+        Customer customer = checkCustomerId(customerId, Operation.READ);
+        if (!customer.getAdditionalInfo().isNull()) {
+            processDashboardIdFromAdditionalInfo((ObjectNode) customer.getAdditionalInfo(), HOME_DASHBOARD);
         }
+        return customer;
     }
 
 
@@ -102,17 +98,13 @@ public class CustomerController extends BaseController {
             @ApiParam(value = CUSTOMER_ID_PARAM_DESCRIPTION)
             @PathVariable(CUSTOMER_ID) String strCustomerId) throws ThingsboardException {
         checkParameter(CUSTOMER_ID, strCustomerId);
-        try {
-            CustomerId customerId = new CustomerId(toUUID(strCustomerId));
-            Customer customer = checkCustomerId(customerId, Operation.READ);
-            ObjectMapper objectMapper = new ObjectMapper();
-            ObjectNode infoObject = objectMapper.createObjectNode();
-            infoObject.put("title", customer.getTitle());
-            infoObject.put(IS_PUBLIC, customer.isPublic());
-            return infoObject;
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        CustomerId customerId = new CustomerId(toUUID(strCustomerId));
+        Customer customer = checkCustomerId(customerId, Operation.READ);
+        ObjectMapper objectMapper = new ObjectMapper();
+        ObjectNode infoObject = objectMapper.createObjectNode();
+        infoObject.put("title", customer.getTitle());
+        infoObject.put(IS_PUBLIC, customer.isPublic());
+        return infoObject;
     }
 
     @ApiOperation(value = "Get Customer Title (getCustomerTitleById)",
@@ -125,13 +117,9 @@ public class CustomerController extends BaseController {
             @ApiParam(value = CUSTOMER_ID_PARAM_DESCRIPTION)
             @PathVariable(CUSTOMER_ID) String strCustomerId) throws ThingsboardException {
         checkParameter(CUSTOMER_ID, strCustomerId);
-        try {
-            CustomerId customerId = new CustomerId(toUUID(strCustomerId));
-            Customer customer = checkCustomerId(customerId, Operation.READ);
-            return customer.getTitle();
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        CustomerId customerId = new CustomerId(toUUID(strCustomerId));
+        Customer customer = checkCustomerId(customerId, Operation.READ);
+        return customer.getTitle();
     }
 
     @ApiOperation(value = "Create or update Customer (saveCustomer)",
@@ -182,13 +170,9 @@ public class CustomerController extends BaseController {
             @RequestParam(required = false) String sortProperty,
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            TenantId tenantId = getCurrentUser().getTenantId();
-            return checkNotNull(customerService.findCustomersByTenantId(tenantId, pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        return checkNotNull(customerService.findCustomersByTenantId(tenantId, pageLink));
     }
 
     @ApiOperation(value = "Get Tenant Customer by Customer title (getTenantCustomer)",
@@ -199,11 +183,7 @@ public class CustomerController extends BaseController {
     public Customer getTenantCustomer(
             @ApiParam(value = "A string value representing the Customer title.")
             @RequestParam String customerTitle) throws ThingsboardException {
-        try {
             TenantId tenantId = getCurrentUser().getTenantId();
-            return checkNotNull(customerService.findCustomerByTenantIdAndTitle(tenantId, customerTitle), "Customer with title [" + customerTitle + "] is not found");
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return checkNotNull(customerService.findCustomerByTenantIdAndTitle(tenantId, customerTitle), "Customer with title [" + customerTitle + "] is not found");
     }
 }
diff --git a/application/src/main/java/org/thingsboard/server/controller/DashboardController.java b/application/src/main/java/org/thingsboard/server/controller/DashboardController.java
index a6381bebcb..d4e5169e7e 100644
--- a/application/src/main/java/org/thingsboard/server/controller/DashboardController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/DashboardController.java
@@ -140,12 +140,8 @@ public class DashboardController extends BaseController {
             @ApiParam(value = DASHBOARD_ID_PARAM_DESCRIPTION)
             @PathVariable(DASHBOARD_ID) String strDashboardId) throws ThingsboardException {
         checkParameter(DASHBOARD_ID, strDashboardId);
-        try {
-            DashboardId dashboardId = new DashboardId(toUUID(strDashboardId));
-            return checkDashboardInfoId(dashboardId, Operation.READ);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        DashboardId dashboardId = new DashboardId(toUUID(strDashboardId));
+        return checkDashboardInfoId(dashboardId, Operation.READ);
     }
 
     @ApiOperation(value = "Get Dashboard (getDashboardById)",
@@ -159,12 +155,8 @@ public class DashboardController extends BaseController {
             @ApiParam(value = DASHBOARD_ID_PARAM_DESCRIPTION)
             @PathVariable(DASHBOARD_ID) String strDashboardId) throws ThingsboardException {
         checkParameter(DASHBOARD_ID, strDashboardId);
-        try {
-            DashboardId dashboardId = new DashboardId(toUUID(strDashboardId));
-            return checkDashboardId(dashboardId, Operation.READ);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        DashboardId dashboardId = new DashboardId(toUUID(strDashboardId));
+        return checkDashboardId(dashboardId, Operation.READ);
     }
 
     @ApiOperation(value = "Create Or Update Dashboard (saveDashboard)",
@@ -362,14 +354,10 @@ public class DashboardController extends BaseController {
             @RequestParam(required = false) String sortProperty,
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            TenantId tenantId = TenantId.fromUUID(toUUID(strTenantId));
-            checkTenantId(tenantId, Operation.READ);
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            return checkNotNull(dashboardService.findDashboardsByTenantId(tenantId, pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        TenantId tenantId = TenantId.fromUUID(toUUID(strTenantId));
+        checkTenantId(tenantId, Operation.READ);
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        return checkNotNull(dashboardService.findDashboardsByTenantId(tenantId, pageLink));
     }
 
     @ApiOperation(value = "Get Tenant Dashboards (getTenantDashboards)",
@@ -392,16 +380,12 @@ public class DashboardController extends BaseController {
             @RequestParam(required = false) String sortProperty,
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            if (mobile != null && mobile) {
-                return checkNotNull(dashboardService.findMobileDashboardsByTenantId(tenantId, pageLink));
-            } else {
-                return checkNotNull(dashboardService.findDashboardsByTenantId(tenantId, pageLink));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        if (mobile != null && mobile) {
+            return checkNotNull(dashboardService.findMobileDashboardsByTenantId(tenantId, pageLink));
+        } else {
+            return checkNotNull(dashboardService.findDashboardsByTenantId(tenantId, pageLink));
         }
     }
 
@@ -428,18 +412,14 @@ public class DashboardController extends BaseController {
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
         checkParameter(CUSTOMER_ID, strCustomerId);
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            CustomerId customerId = new CustomerId(toUUID(strCustomerId));
-            checkCustomerId(customerId, Operation.READ);
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            if (mobile != null && mobile) {
-                return checkNotNull(dashboardService.findMobileDashboardsByTenantIdAndCustomerId(tenantId, customerId, pageLink));
-            } else {
-                return checkNotNull(dashboardService.findDashboardsByTenantIdAndCustomerId(tenantId, customerId, pageLink));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        CustomerId customerId = new CustomerId(toUUID(strCustomerId));
+        checkCustomerId(customerId, Operation.READ);
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        if (mobile != null && mobile) {
+            return checkNotNull(dashboardService.findMobileDashboardsByTenantIdAndCustomerId(tenantId, customerId, pageLink));
+        } else {
+            return checkNotNull(dashboardService.findDashboardsByTenantIdAndCustomerId(tenantId, customerId, pageLink));
         }
     }
 
@@ -453,31 +433,27 @@ public class DashboardController extends BaseController {
     @RequestMapping(value = "/dashboard/home", method = RequestMethod.GET)
     @ResponseBody
     public HomeDashboard getHomeDashboard() throws ThingsboardException {
-        try {
-            SecurityUser securityUser = getCurrentUser();
-            if (securityUser.isSystemAdmin()) {
-                return null;
+        SecurityUser securityUser = getCurrentUser();
+        if (securityUser.isSystemAdmin()) {
+            return null;
+        }
+        User user = userService.findUserById(securityUser.getTenantId(), securityUser.getId());
+        JsonNode additionalInfo = user.getAdditionalInfo();
+        HomeDashboard homeDashboard;
+        homeDashboard = extractHomeDashboardFromAdditionalInfo(additionalInfo);
+        if (homeDashboard == null) {
+            if (securityUser.isCustomerUser()) {
+                Customer customer = customerService.findCustomerById(securityUser.getTenantId(), securityUser.getCustomerId());
+                additionalInfo = customer.getAdditionalInfo();
+                homeDashboard = extractHomeDashboardFromAdditionalInfo(additionalInfo);
             }
-            User user = userService.findUserById(securityUser.getTenantId(), securityUser.getId());
-            JsonNode additionalInfo = user.getAdditionalInfo();
-            HomeDashboard homeDashboard;
-            homeDashboard = extractHomeDashboardFromAdditionalInfo(additionalInfo);
             if (homeDashboard == null) {
-                if (securityUser.isCustomerUser()) {
-                    Customer customer = customerService.findCustomerById(securityUser.getTenantId(), securityUser.getCustomerId());
-                    additionalInfo = customer.getAdditionalInfo();
-                    homeDashboard = extractHomeDashboardFromAdditionalInfo(additionalInfo);
-                }
-                if (homeDashboard == null) {
-                    Tenant tenant = tenantService.findTenantById(securityUser.getTenantId());
-                    additionalInfo = tenant.getAdditionalInfo();
-                    homeDashboard = extractHomeDashboardFromAdditionalInfo(additionalInfo);
-                }
+                Tenant tenant = tenantService.findTenantById(securityUser.getTenantId());
+                additionalInfo = tenant.getAdditionalInfo();
+                homeDashboard = extractHomeDashboardFromAdditionalInfo(additionalInfo);
             }
-            return homeDashboard;
-        } catch (Exception e) {
-            throw handleException(e);
         }
+        return homeDashboard;
     }
 
     @ApiOperation(value = "Get Home Dashboard Info (getHomeDashboardInfo)",
@@ -490,31 +466,27 @@ public class DashboardController extends BaseController {
     @RequestMapping(value = "/dashboard/home/info", method = RequestMethod.GET)
     @ResponseBody
     public HomeDashboardInfo getHomeDashboardInfo() throws ThingsboardException {
-        try {
-            SecurityUser securityUser = getCurrentUser();
-            if (securityUser.isSystemAdmin()) {
-                return null;
+        SecurityUser securityUser = getCurrentUser();
+        if (securityUser.isSystemAdmin()) {
+            return null;
+        }
+        User user = userService.findUserById(securityUser.getTenantId(), securityUser.getId());
+        JsonNode additionalInfo = user.getAdditionalInfo();
+        HomeDashboardInfo homeDashboardInfo;
+        homeDashboardInfo = extractHomeDashboardInfoFromAdditionalInfo(additionalInfo);
+        if (homeDashboardInfo == null) {
+            if (securityUser.isCustomerUser()) {
+                Customer customer = customerService.findCustomerById(securityUser.getTenantId(), securityUser.getCustomerId());
+                additionalInfo = customer.getAdditionalInfo();
+                homeDashboardInfo = extractHomeDashboardInfoFromAdditionalInfo(additionalInfo);
             }
-            User user = userService.findUserById(securityUser.getTenantId(), securityUser.getId());
-            JsonNode additionalInfo = user.getAdditionalInfo();
-            HomeDashboardInfo homeDashboardInfo;
-            homeDashboardInfo = extractHomeDashboardInfoFromAdditionalInfo(additionalInfo);
             if (homeDashboardInfo == null) {
-                if (securityUser.isCustomerUser()) {
-                    Customer customer = customerService.findCustomerById(securityUser.getTenantId(), securityUser.getCustomerId());
-                    additionalInfo = customer.getAdditionalInfo();
-                    homeDashboardInfo = extractHomeDashboardInfoFromAdditionalInfo(additionalInfo);
-                }
-                if (homeDashboardInfo == null) {
-                    Tenant tenant = tenantService.findTenantById(securityUser.getTenantId());
-                    additionalInfo = tenant.getAdditionalInfo();
-                    homeDashboardInfo = extractHomeDashboardInfoFromAdditionalInfo(additionalInfo);
-                }
+                Tenant tenant = tenantService.findTenantById(securityUser.getTenantId());
+                additionalInfo = tenant.getAdditionalInfo();
+                homeDashboardInfo = extractHomeDashboardInfoFromAdditionalInfo(additionalInfo);
             }
-            return homeDashboardInfo;
-        } catch (Exception e) {
-            throw handleException(e);
         }
+        return homeDashboardInfo;
     }
 
     @ApiOperation(value = "Get Tenant Home Dashboard Info (getTenantHomeDashboardInfo)",
@@ -525,22 +497,18 @@ public class DashboardController extends BaseController {
     @RequestMapping(value = "/tenant/dashboard/home/info", method = RequestMethod.GET)
     @ResponseBody
     public HomeDashboardInfo getTenantHomeDashboardInfo() throws ThingsboardException {
-        try {
-            Tenant tenant = tenantService.findTenantById(getTenantId());
-            JsonNode additionalInfo = tenant.getAdditionalInfo();
-            DashboardId dashboardId = null;
-            boolean hideDashboardToolbar = true;
-            if (additionalInfo != null && additionalInfo.has(HOME_DASHBOARD_ID) && !additionalInfo.get(HOME_DASHBOARD_ID).isNull()) {
-                String strDashboardId = additionalInfo.get(HOME_DASHBOARD_ID).asText();
-                dashboardId = new DashboardId(toUUID(strDashboardId));
-                if (additionalInfo.has(HOME_DASHBOARD_HIDE_TOOLBAR)) {
-                    hideDashboardToolbar = additionalInfo.get(HOME_DASHBOARD_HIDE_TOOLBAR).asBoolean();
-                }
+        Tenant tenant = tenantService.findTenantById(getTenantId());
+        JsonNode additionalInfo = tenant.getAdditionalInfo();
+        DashboardId dashboardId = null;
+        boolean hideDashboardToolbar = true;
+        if (additionalInfo != null && additionalInfo.has(HOME_DASHBOARD_ID) && !additionalInfo.get(HOME_DASHBOARD_ID).isNull()) {
+            String strDashboardId = additionalInfo.get(HOME_DASHBOARD_ID).asText();
+            dashboardId = new DashboardId(toUUID(strDashboardId));
+            if (additionalInfo.has(HOME_DASHBOARD_HIDE_TOOLBAR)) {
+                hideDashboardToolbar = additionalInfo.get(HOME_DASHBOARD_HIDE_TOOLBAR).asBoolean();
             }
-            return new HomeDashboardInfo(dashboardId, hideDashboardToolbar);
-        } catch (Exception e) {
-            throw handleException(e);
         }
+        return new HomeDashboardInfo(dashboardId, hideDashboardToolbar);
     }
 
     @ApiOperation(value = "Update Tenant Home Dashboard Info (getTenantHomeDashboardInfo)",
@@ -554,27 +522,23 @@ public class DashboardController extends BaseController {
             @ApiParam(value = "A JSON object that represents home dashboard id and other parameters", required = true)
             @RequestBody HomeDashboardInfo homeDashboardInfo) throws ThingsboardException {
 
-        try {
-            if (homeDashboardInfo.getDashboardId() != null) {
-                checkDashboardId(homeDashboardInfo.getDashboardId(), Operation.READ);
-            }
-            Tenant tenant = tenantService.findTenantById(getTenantId());
-            JsonNode additionalInfo = tenant.getAdditionalInfo();
-            if (additionalInfo == null || !(additionalInfo instanceof ObjectNode)) {
-                additionalInfo = JacksonUtil.OBJECT_MAPPER.createObjectNode();
-            }
-            if (homeDashboardInfo.getDashboardId() != null) {
-                ((ObjectNode) additionalInfo).put(HOME_DASHBOARD_ID, homeDashboardInfo.getDashboardId().getId().toString());
-                ((ObjectNode) additionalInfo).put(HOME_DASHBOARD_HIDE_TOOLBAR, homeDashboardInfo.isHideDashboardToolbar());
-            } else {
-                ((ObjectNode) additionalInfo).remove(HOME_DASHBOARD_ID);
-                ((ObjectNode) additionalInfo).remove(HOME_DASHBOARD_HIDE_TOOLBAR);
-            }
-            tenant.setAdditionalInfo(additionalInfo);
-            tenantService.saveTenant(tenant);
-        } catch (Exception e) {
-            throw handleException(e);
+        if (homeDashboardInfo.getDashboardId() != null) {
+            checkDashboardId(homeDashboardInfo.getDashboardId(), Operation.READ);
+        }
+        Tenant tenant = tenantService.findTenantById(getTenantId());
+        JsonNode additionalInfo = tenant.getAdditionalInfo();
+        if (additionalInfo == null || !(additionalInfo instanceof ObjectNode)) {
+            additionalInfo = JacksonUtil.OBJECT_MAPPER.createObjectNode();
+        }
+        if (homeDashboardInfo.getDashboardId() != null) {
+            ((ObjectNode) additionalInfo).put(HOME_DASHBOARD_ID, homeDashboardInfo.getDashboardId().getId().toString());
+            ((ObjectNode) additionalInfo).put(HOME_DASHBOARD_HIDE_TOOLBAR, homeDashboardInfo.isHideDashboardToolbar());
+        } else {
+            ((ObjectNode) additionalInfo).remove(HOME_DASHBOARD_ID);
+            ((ObjectNode) additionalInfo).remove(HOME_DASHBOARD_HIDE_TOOLBAR);
         }
+        tenant.setAdditionalInfo(additionalInfo);
+        tenantService.saveTenant(tenant);
     }
 
     private HomeDashboardInfo extractHomeDashboardInfoFromAdditionalInfo(JsonNode additionalInfo) {
@@ -681,28 +645,24 @@ public class DashboardController extends BaseController {
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
         checkParameter("edgeId", strEdgeId);
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
-            checkEdgeId(edgeId, Operation.READ);
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            PageData<DashboardInfo> nonFilteredResult = dashboardService.findDashboardsByTenantIdAndEdgeId(tenantId, edgeId, pageLink);
-            List<DashboardInfo> filteredDashboards = nonFilteredResult.getData().stream().filter(dashboardInfo -> {
-                try {
-                    accessControlService.checkPermission(getCurrentUser(), Resource.DASHBOARD, Operation.READ, dashboardInfo.getId(), dashboardInfo);
-                    return true;
-                } catch (ThingsboardException e) {
-                    return false;
-                }
-            }).collect(Collectors.toList());
-            PageData<DashboardInfo> filteredResult = new PageData<>(filteredDashboards,
-                    nonFilteredResult.getTotalPages(),
-                    nonFilteredResult.getTotalElements(),
-                    nonFilteredResult.hasNext());
-            return checkNotNull(filteredResult);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        TenantId tenantId = getCurrentUser().getTenantId();
+        EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
+        checkEdgeId(edgeId, Operation.READ);
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        PageData<DashboardInfo> nonFilteredResult = dashboardService.findDashboardsByTenantIdAndEdgeId(tenantId, edgeId, pageLink);
+        List<DashboardInfo> filteredDashboards = nonFilteredResult.getData().stream().filter(dashboardInfo -> {
+            try {
+                accessControlService.checkPermission(getCurrentUser(), Resource.DASHBOARD, Operation.READ, dashboardInfo.getId(), dashboardInfo);
+                return true;
+            } catch (ThingsboardException e) {
+                return false;
+            }
+        }).collect(Collectors.toList());
+        PageData<DashboardInfo> filteredResult = new PageData<>(filteredDashboards,
+                nonFilteredResult.getTotalPages(),
+                nonFilteredResult.getTotalElements(),
+                nonFilteredResult.hasNext());
+        return checkNotNull(filteredResult);
     }
 
     private Set<CustomerId> customerIdFromStr(String[] strCustomerIds) {
diff --git a/application/src/main/java/org/thingsboard/server/controller/DeviceController.java b/application/src/main/java/org/thingsboard/server/controller/DeviceController.java
index 33eb5d1975..0e6e19ad8d 100644
--- a/application/src/main/java/org/thingsboard/server/controller/DeviceController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/DeviceController.java
@@ -77,6 +77,7 @@ import javax.annotation.Nullable;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.UUID;
+import java.util.concurrent.ExecutionException;
 import java.util.stream.Collectors;
 
 import static org.thingsboard.server.controller.ControllerConstants.CUSTOMER_AUTHORITY_PARAGRAPH;
@@ -308,16 +309,12 @@ public class DeviceController extends BaseController {
             @RequestParam(required = false) String sortProperty,
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            if (type != null && type.trim().length() > 0) {
-                return checkNotNull(deviceService.findDevicesByTenantIdAndType(tenantId, type, pageLink));
-            } else {
-                return checkNotNull(deviceService.findDevicesByTenantId(tenantId, pageLink));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        if (type != null && type.trim().length() > 0) {
+            return checkNotNull(deviceService.findDevicesByTenantIdAndType(tenantId, type, pageLink));
+        } else {
+            return checkNotNull(deviceService.findDevicesByTenantId(tenantId, pageLink));
         }
     }
 
@@ -343,19 +340,15 @@ public class DeviceController extends BaseController {
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder
     ) throws ThingsboardException {
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            if (type != null && type.trim().length() > 0) {
-                return checkNotNull(deviceService.findDeviceInfosByTenantIdAndType(tenantId, type, pageLink));
-            } else if (deviceProfileId != null && deviceProfileId.length() > 0) {
-                DeviceProfileId profileId = new DeviceProfileId(toUUID(deviceProfileId));
-                return checkNotNull(deviceService.findDeviceInfosByTenantIdAndDeviceProfileId(tenantId, profileId, pageLink));
-            } else {
-                return checkNotNull(deviceService.findDeviceInfosByTenantId(tenantId, pageLink));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        if (type != null && type.trim().length() > 0) {
+            return checkNotNull(deviceService.findDeviceInfosByTenantIdAndType(tenantId, type, pageLink));
+        } else if (deviceProfileId != null && deviceProfileId.length() > 0) {
+            DeviceProfileId profileId = new DeviceProfileId(toUUID(deviceProfileId));
+            return checkNotNull(deviceService.findDeviceInfosByTenantIdAndDeviceProfileId(tenantId, profileId, pageLink));
+        } else {
+            return checkNotNull(deviceService.findDeviceInfosByTenantId(tenantId, pageLink));
         }
     }
 
@@ -368,12 +361,8 @@ public class DeviceController extends BaseController {
     public Device getTenantDevice(
             @ApiParam(value = DEVICE_NAME_DESCRIPTION)
             @RequestParam String deviceName) throws ThingsboardException {
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            return checkNotNull(deviceService.findDeviceByTenantIdAndName(tenantId, deviceName));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        TenantId tenantId = getCurrentUser().getTenantId();
+        return checkNotNull(deviceService.findDeviceByTenantIdAndName(tenantId, deviceName));
     }
 
     @ApiOperation(value = "Get Customer Devices (getCustomerDevices)",
@@ -398,18 +387,14 @@ public class DeviceController extends BaseController {
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
         checkParameter("customerId", strCustomerId);
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            CustomerId customerId = new CustomerId(toUUID(strCustomerId));
-            checkCustomerId(customerId, Operation.READ);
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            if (type != null && type.trim().length() > 0) {
-                return checkNotNull(deviceService.findDevicesByTenantIdAndCustomerIdAndType(tenantId, customerId, type, pageLink));
-            } else {
-                return checkNotNull(deviceService.findDevicesByTenantIdAndCustomerId(tenantId, customerId, pageLink));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        CustomerId customerId = new CustomerId(toUUID(strCustomerId));
+        checkCustomerId(customerId, Operation.READ);
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        if (type != null && type.trim().length() > 0) {
+            return checkNotNull(deviceService.findDevicesByTenantIdAndCustomerIdAndType(tenantId, customerId, type, pageLink));
+        } else {
+            return checkNotNull(deviceService.findDevicesByTenantIdAndCustomerId(tenantId, customerId, pageLink));
         }
     }
 
@@ -437,21 +422,17 @@ public class DeviceController extends BaseController {
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
         checkParameter("customerId", strCustomerId);
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            CustomerId customerId = new CustomerId(toUUID(strCustomerId));
-            checkCustomerId(customerId, Operation.READ);
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            if (type != null && type.trim().length() > 0) {
-                return checkNotNull(deviceService.findDeviceInfosByTenantIdAndCustomerIdAndType(tenantId, customerId, type, pageLink));
-            } else if (deviceProfileId != null && deviceProfileId.length() > 0) {
-                DeviceProfileId profileId = new DeviceProfileId(toUUID(deviceProfileId));
-                return checkNotNull(deviceService.findDeviceInfosByTenantIdAndCustomerIdAndDeviceProfileId(tenantId, customerId, profileId, pageLink));
-            } else {
-                return checkNotNull(deviceService.findDeviceInfosByTenantIdAndCustomerId(tenantId, customerId, pageLink));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        CustomerId customerId = new CustomerId(toUUID(strCustomerId));
+        checkCustomerId(customerId, Operation.READ);
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        if (type != null && type.trim().length() > 0) {
+            return checkNotNull(deviceService.findDeviceInfosByTenantIdAndCustomerIdAndType(tenantId, customerId, type, pageLink));
+        } else if (deviceProfileId != null && deviceProfileId.length() > 0) {
+            DeviceProfileId profileId = new DeviceProfileId(toUUID(deviceProfileId));
+            return checkNotNull(deviceService.findDeviceInfosByTenantIdAndCustomerIdAndDeviceProfileId(tenantId, customerId, profileId, pageLink));
+        } else {
+            return checkNotNull(deviceService.findDeviceInfosByTenantIdAndCustomerId(tenantId, customerId, pageLink));
         }
     }
 
@@ -462,26 +443,22 @@ public class DeviceController extends BaseController {
     @ResponseBody
     public List<Device> getDevicesByIds(
             @ApiParam(value = "A list of devices ids, separated by comma ','")
-            @RequestParam("deviceIds") String[] strDeviceIds) throws ThingsboardException {
+            @RequestParam("deviceIds") String[] strDeviceIds) throws ThingsboardException, ExecutionException, InterruptedException {
         checkArrayParameter("deviceIds", strDeviceIds);
-        try {
-            SecurityUser user = getCurrentUser();
-            TenantId tenantId = user.getTenantId();
-            CustomerId customerId = user.getCustomerId();
-            List<DeviceId> deviceIds = new ArrayList<>();
-            for (String strDeviceId : strDeviceIds) {
-                deviceIds.add(new DeviceId(toUUID(strDeviceId)));
-            }
-            ListenableFuture<List<Device>> devices;
-            if (customerId == null || customerId.isNullUid()) {
-                devices = deviceService.findDevicesByTenantIdAndIdsAsync(tenantId, deviceIds);
-            } else {
-                devices = deviceService.findDevicesByTenantIdCustomerIdAndIdsAsync(tenantId, customerId, deviceIds);
-            }
-            return checkNotNull(devices.get());
-        } catch (Exception e) {
-            throw handleException(e);
+        SecurityUser user = getCurrentUser();
+        TenantId tenantId = user.getTenantId();
+        CustomerId customerId = user.getCustomerId();
+        List<DeviceId> deviceIds = new ArrayList<>();
+        for (String strDeviceId : strDeviceIds) {
+            deviceIds.add(new DeviceId(toUUID(strDeviceId)));
+        }
+        ListenableFuture<List<Device>> devices;
+        if (customerId == null || customerId.isNullUid()) {
+            devices = deviceService.findDevicesByTenantIdAndIdsAsync(tenantId, deviceIds);
+        } else {
+            devices = deviceService.findDevicesByTenantIdCustomerIdAndIdsAsync(tenantId, customerId, deviceIds);
         }
+        return checkNotNull(devices.get());
     }
 
     @ApiOperation(value = "Find related devices (findByQuery)",
@@ -493,25 +470,21 @@ public class DeviceController extends BaseController {
     @ResponseBody
     public List<Device> findByQuery(
             @ApiParam(value = "The device search query JSON")
-            @RequestBody DeviceSearchQuery query) throws ThingsboardException {
+            @RequestBody DeviceSearchQuery query) throws ThingsboardException, ExecutionException, InterruptedException {
         checkNotNull(query);
         checkNotNull(query.getParameters());
         checkNotNull(query.getDeviceTypes());
         checkEntityId(query.getParameters().getEntityId(), Operation.READ);
-        try {
-            List<Device> devices = checkNotNull(deviceService.findDevicesByQuery(getCurrentUser().getTenantId(), query).get());
-            devices = devices.stream().filter(device -> {
-                try {
-                    accessControlService.checkPermission(getCurrentUser(), Resource.DEVICE, Operation.READ, device.getId(), device);
-                    return true;
-                } catch (ThingsboardException e) {
-                    return false;
-                }
-            }).collect(Collectors.toList());
-            return devices;
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        List<Device> devices = checkNotNull(deviceService.findDevicesByQuery(getCurrentUser().getTenantId(), query).get());
+        devices = devices.stream().filter(device -> {
+            try {
+                accessControlService.checkPermission(getCurrentUser(), Resource.DEVICE, Operation.READ, device.getId(), device);
+                return true;
+            } catch (ThingsboardException e) {
+                return false;
+            }
+        }).collect(Collectors.toList());
+        return devices;
     }
 
     @ApiOperation(value = "Get Device Types (getDeviceTypes)",
@@ -520,15 +493,11 @@ public class DeviceController extends BaseController {
     @PreAuthorize("hasAnyAuthority('TENANT_ADMIN', 'CUSTOMER_USER')")
     @RequestMapping(value = "/device/types", method = RequestMethod.GET)
     @ResponseBody
-    public List<EntitySubtype> getDeviceTypes() throws ThingsboardException {
-        try {
-            SecurityUser user = getCurrentUser();
-            TenantId tenantId = user.getTenantId();
-            ListenableFuture<List<EntitySubtype>> deviceTypes = deviceService.findDeviceTypesByTenantId(tenantId);
-            return checkNotNull(deviceTypes.get());
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+    public List<EntitySubtype> getDeviceTypes() throws ThingsboardException, ExecutionException, InterruptedException {
+        SecurityUser user = getCurrentUser();
+        TenantId tenantId = user.getTenantId();
+        ListenableFuture<List<EntitySubtype>> deviceTypes = deviceService.findDeviceTypesByTenantId(tenantId);
+        return checkNotNull(deviceTypes.get());
     }
 
     @ApiOperation(value = "Claim device (claimDevice)",
@@ -722,33 +691,29 @@ public class DeviceController extends BaseController {
             @ApiParam(value = "Timestamp. Devices with creation time after it won't be queried")
             @RequestParam(required = false) Long endTime) throws ThingsboardException {
         checkParameter(EDGE_ID, strEdgeId);
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
-            checkEdgeId(edgeId, Operation.READ);
-            TimePageLink pageLink = createTimePageLink(pageSize, page, textSearch, sortProperty, sortOrder, startTime, endTime);
-            PageData<Device> nonFilteredResult;
-            if (type != null && type.trim().length() > 0) {
-                nonFilteredResult = deviceService.findDevicesByTenantIdAndEdgeIdAndType(tenantId, edgeId, type, pageLink);
-            } else {
-                nonFilteredResult = deviceService.findDevicesByTenantIdAndEdgeId(tenantId, edgeId, pageLink);
-            }
-            List<Device> filteredDevices = nonFilteredResult.getData().stream().filter(device -> {
-                try {
-                    accessControlService.checkPermission(getCurrentUser(), Resource.DEVICE, Operation.READ, device.getId(), device);
-                    return true;
-                } catch (ThingsboardException e) {
-                    return false;
-                }
-            }).collect(Collectors.toList());
-            PageData<Device> filteredResult = new PageData<>(filteredDevices,
-                    nonFilteredResult.getTotalPages(),
-                    nonFilteredResult.getTotalElements(),
-                    nonFilteredResult.hasNext());
-            return checkNotNull(filteredResult);
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
+        checkEdgeId(edgeId, Operation.READ);
+        TimePageLink pageLink = createTimePageLink(pageSize, page, textSearch, sortProperty, sortOrder, startTime, endTime);
+        PageData<Device> nonFilteredResult;
+        if (type != null && type.trim().length() > 0) {
+            nonFilteredResult = deviceService.findDevicesByTenantIdAndEdgeIdAndType(tenantId, edgeId, type, pageLink);
+        } else {
+            nonFilteredResult = deviceService.findDevicesByTenantIdAndEdgeId(tenantId, edgeId, pageLink);
         }
+        List<Device> filteredDevices = nonFilteredResult.getData().stream().filter(device -> {
+            try {
+                accessControlService.checkPermission(getCurrentUser(), Resource.DEVICE, Operation.READ, device.getId(), device);
+                return true;
+            } catch (ThingsboardException e) {
+                return false;
+            }
+        }).collect(Collectors.toList());
+        PageData<Device> filteredResult = new PageData<>(filteredDevices,
+                nonFilteredResult.getTotalPages(),
+                nonFilteredResult.getTotalElements(),
+                nonFilteredResult.hasNext());
+        return checkNotNull(filteredResult);
     }
 
     @ApiOperation(value = "Count devices by device profile  (countByDeviceProfileAndEmptyOtaPackage)",
@@ -766,14 +731,10 @@ public class DeviceController extends BaseController {
              @PathVariable("deviceProfileId") String deviceProfileId) throws ThingsboardException {
         checkParameter("OtaPackageType", otaPackageType);
         checkParameter("DeviceProfileId", deviceProfileId);
-        try {
-            return deviceService.countDevicesByTenantIdAndDeviceProfileIdAndEmptyOtaPackage(
-                    getTenantId(),
-                    new DeviceProfileId(UUID.fromString(deviceProfileId)),
-                    OtaPackageType.valueOf(otaPackageType));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return deviceService.countDevicesByTenantIdAndDeviceProfileIdAndEmptyOtaPackage(
+                getTenantId(),
+                new DeviceProfileId(UUID.fromString(deviceProfileId)),
+                OtaPackageType.valueOf(otaPackageType));
     }
 
     @ApiOperation(value = "Import the bulk of devices (processDevicesBulkImport)",
diff --git a/application/src/main/java/org/thingsboard/server/controller/DeviceProfileController.java b/application/src/main/java/org/thingsboard/server/controller/DeviceProfileController.java
index 78f80f059a..c888d67252 100644
--- a/application/src/main/java/org/thingsboard/server/controller/DeviceProfileController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/DeviceProfileController.java
@@ -87,12 +87,8 @@ public class DeviceProfileController extends BaseController {
             @ApiParam(value = DEVICE_PROFILE_ID_PARAM_DESCRIPTION)
             @PathVariable(DEVICE_PROFILE_ID) String strDeviceProfileId) throws ThingsboardException {
         checkParameter(DEVICE_PROFILE_ID, strDeviceProfileId);
-        try {
-            DeviceProfileId deviceProfileId = new DeviceProfileId(toUUID(strDeviceProfileId));
-            return checkDeviceProfileId(deviceProfileId, Operation.READ);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        DeviceProfileId deviceProfileId = new DeviceProfileId(toUUID(strDeviceProfileId));
+        return checkDeviceProfileId(deviceProfileId, Operation.READ);
     }
 
     @ApiOperation(value = "Get Device Profile Info (getDeviceProfileInfoById)",
@@ -106,12 +102,8 @@ public class DeviceProfileController extends BaseController {
             @ApiParam(value = DEVICE_PROFILE_ID_PARAM_DESCRIPTION)
             @PathVariable(DEVICE_PROFILE_ID) String strDeviceProfileId) throws ThingsboardException {
         checkParameter(DEVICE_PROFILE_ID, strDeviceProfileId);
-        try {
-            DeviceProfileId deviceProfileId = new DeviceProfileId(toUUID(strDeviceProfileId));
-            return new DeviceProfileInfo(checkDeviceProfileId(deviceProfileId, Operation.READ));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        DeviceProfileId deviceProfileId = new DeviceProfileId(toUUID(strDeviceProfileId));
+        return new DeviceProfileInfo(checkDeviceProfileId(deviceProfileId, Operation.READ));
     }
 
     @ApiOperation(value = "Get Default Device Profile (getDefaultDeviceProfileInfo)",
@@ -122,11 +114,7 @@ public class DeviceProfileController extends BaseController {
     @RequestMapping(value = "/deviceProfileInfo/default", method = RequestMethod.GET)
     @ResponseBody
     public DeviceProfileInfo getDefaultDeviceProfileInfo() throws ThingsboardException {
-        try {
-            return checkNotNull(deviceProfileService.findDefaultDeviceProfileInfo(getTenantId()));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return checkNotNull(deviceProfileService.findDefaultDeviceProfileInfo(getTenantId()));
     }
 
     @ApiOperation(value = "Get time-series keys (getTimeseriesKeys)",
@@ -150,11 +138,7 @@ public class DeviceProfileController extends BaseController {
             deviceProfileId = null;
         }
 
-        try {
-            return timeseriesService.findAllKeysByDeviceProfileId(getTenantId(), deviceProfileId);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return timeseriesService.findAllKeysByDeviceProfileId(getTenantId(), deviceProfileId);
     }
 
     @ApiOperation(value = "Get attribute keys (getAttributesKeys)",
@@ -178,11 +162,7 @@ public class DeviceProfileController extends BaseController {
             deviceProfileId = null;
         }
 
-        try {
-            return attributesService.findAllKeysByDeviceProfileId(getTenantId(), deviceProfileId);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return attributesService.findAllKeysByDeviceProfileId(getTenantId(), deviceProfileId);
     }
 
     @ApiOperation(value = "Create Or Update Device Profile (saveDeviceProfile)",
@@ -256,12 +236,8 @@ public class DeviceProfileController extends BaseController {
             @RequestParam(required = false) String sortProperty,
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            return checkNotNull(deviceProfileService.findDeviceProfiles(getTenantId(), pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        return checkNotNull(deviceProfileService.findDeviceProfiles(getTenantId(), pageLink));
     }
 
     @ApiOperation(value = "Get Device Profiles for transport type (getDeviceProfileInfos)",
@@ -284,11 +260,7 @@ public class DeviceProfileController extends BaseController {
             @RequestParam(required = false) String sortOrder,
             @ApiParam(value = "Type of the transport", allowableValues = TRANSPORT_TYPE_ALLOWABLE_VALUES)
             @RequestParam(required = false) String transportType) throws ThingsboardException {
-        try {
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            return checkNotNull(deviceProfileService.findDeviceProfileInfos(getTenantId(), pageLink, transportType));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        return checkNotNull(deviceProfileService.findDeviceProfileInfos(getTenantId(), pageLink, transportType));
     }
 }
diff --git a/application/src/main/java/org/thingsboard/server/controller/EdgeController.java b/application/src/main/java/org/thingsboard/server/controller/EdgeController.java
index 4b7ac62fa0..7b3617e563 100644
--- a/application/src/main/java/org/thingsboard/server/controller/EdgeController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/EdgeController.java
@@ -68,6 +68,7 @@ import javax.servlet.http.HttpServletRequest;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.UUID;
+import java.util.concurrent.ExecutionException;
 import java.util.stream.Collectors;
 
 import static org.thingsboard.server.controller.ControllerConstants.CUSTOMER_ID_PARAM_DESCRIPTION;
@@ -118,12 +119,8 @@ public class EdgeController extends BaseController {
     public Edge getEdgeById(@ApiParam(value = EDGE_ID_PARAM_DESCRIPTION, required = true)
                             @PathVariable(EDGE_ID) String strEdgeId) throws ThingsboardException {
         checkParameter(EDGE_ID, strEdgeId);
-        try {
-            EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
-            return checkEdgeId(edgeId, Operation.READ);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
+        return checkEdgeId(edgeId, Operation.READ);
     }
 
     @ApiOperation(value = "Get Edge Info (getEdgeInfoById)",
@@ -135,12 +132,8 @@ public class EdgeController extends BaseController {
     public EdgeInfo getEdgeInfoById(@ApiParam(value = EDGE_ID_PARAM_DESCRIPTION, required = true)
                                     @PathVariable(EDGE_ID) String strEdgeId) throws ThingsboardException {
         checkParameter(EDGE_ID, strEdgeId);
-        try {
-            EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
-            return checkEdgeInfoId(edgeId, Operation.READ);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
+        return checkEdgeInfoId(edgeId, Operation.READ);
     }
 
     @ApiOperation(value = "Create Or Update Edge (saveEdge)",
@@ -205,13 +198,9 @@ public class EdgeController extends BaseController {
                                    @RequestParam(required = false) String sortProperty,
                                    @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
                                    @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            TenantId tenantId = getCurrentUser().getTenantId();
-            return checkNotNull(edgeService.findEdgesByTenantId(tenantId, pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        return checkNotNull(edgeService.findEdgesByTenantId(tenantId, pageLink));
     }
 
     @ApiOperation(value = "Assign edge to customer (assignEdgeToCustomer)",
@@ -287,16 +276,12 @@ public class EdgeController extends BaseController {
             @RequestParam(required = false) String sortProperty,
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            if (type != null && type.trim().length() > 0) {
-                return checkNotNull(edgeService.findEdgesByTenantIdAndType(tenantId, type, pageLink));
-            } else {
-                return checkNotNull(edgeService.findEdgesByTenantId(tenantId, pageLink));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        if (type != null && type.trim().length() > 0) {
+            return checkNotNull(edgeService.findEdgesByTenantIdAndType(tenantId, type, pageLink));
+        } else {
+            return checkNotNull(edgeService.findEdgesByTenantId(tenantId, pageLink));
         }
     }
 
@@ -320,16 +305,12 @@ public class EdgeController extends BaseController {
             @RequestParam(required = false) String sortProperty,
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            if (type != null && type.trim().length() > 0) {
-                return checkNotNull(edgeService.findEdgeInfosByTenantIdAndType(tenantId, type, pageLink));
-            } else {
-                return checkNotNull(edgeService.findEdgeInfosByTenantId(tenantId, pageLink));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        if (type != null && type.trim().length() > 0) {
+            return checkNotNull(edgeService.findEdgeInfosByTenantIdAndType(tenantId, type, pageLink));
+        } else {
+            return checkNotNull(edgeService.findEdgeInfosByTenantId(tenantId, pageLink));
         }
     }
 
@@ -342,12 +323,8 @@ public class EdgeController extends BaseController {
     @ResponseBody
     public Edge getTenantEdge(@ApiParam(value = "Unique name of the edge", required = true)
                               @RequestParam String edgeName) throws ThingsboardException {
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            return checkNotNull(edgeService.findEdgeByTenantIdAndName(tenantId, edgeName));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        TenantId tenantId = getCurrentUser().getTenantId();
+        return checkNotNull(edgeService.findEdgeByTenantIdAndName(tenantId, edgeName));
     }
 
     @ApiOperation(value = "Set root rule chain for provided edge (setEdgeRootRuleChain)",
@@ -393,22 +370,18 @@ public class EdgeController extends BaseController {
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
         checkParameter("customerId", strCustomerId);
-        try {
-            SecurityUser user = getCurrentUser();
-            TenantId tenantId = user.getTenantId();
-            CustomerId customerId = new CustomerId(toUUID(strCustomerId));
-            checkCustomerId(customerId, Operation.READ);
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            PageData<Edge> result;
-            if (type != null && type.trim().length() > 0) {
-                result = edgeService.findEdgesByTenantIdAndCustomerIdAndType(tenantId, customerId, type, pageLink);
-            } else {
-                result = edgeService.findEdgesByTenantIdAndCustomerId(tenantId, customerId, pageLink);
-            }
-            return checkNotNull(result);
-        } catch (Exception e) {
-            throw handleException(e);
+        SecurityUser user = getCurrentUser();
+        TenantId tenantId = user.getTenantId();
+        CustomerId customerId = new CustomerId(toUUID(strCustomerId));
+        checkCustomerId(customerId, Operation.READ);
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        PageData<Edge> result;
+        if (type != null && type.trim().length() > 0) {
+            result = edgeService.findEdgesByTenantIdAndCustomerIdAndType(tenantId, customerId, type, pageLink);
+        } else {
+            result = edgeService.findEdgesByTenantIdAndCustomerId(tenantId, customerId, pageLink);
         }
+        return checkNotNull(result);
     }
 
     @ApiOperation(value = "Get Customer Edge Infos (getCustomerEdgeInfos)",
@@ -433,22 +406,18 @@ public class EdgeController extends BaseController {
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
         checkParameter("customerId", strCustomerId);
-        try {
-            SecurityUser user = getCurrentUser();
-            TenantId tenantId = user.getTenantId();
-            CustomerId customerId = new CustomerId(toUUID(strCustomerId));
-            checkCustomerId(customerId, Operation.READ);
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            PageData<EdgeInfo> result;
-            if (type != null && type.trim().length() > 0) {
-                result = edgeService.findEdgeInfosByTenantIdAndCustomerIdAndType(tenantId, customerId, type, pageLink);
-            } else {
-                result = edgeService.findEdgeInfosByTenantIdAndCustomerId(tenantId, customerId, pageLink);
-            }
-            return checkNotNull(result);
-        } catch (Exception e) {
-            throw handleException(e);
+        SecurityUser user = getCurrentUser();
+        TenantId tenantId = user.getTenantId();
+        CustomerId customerId = new CustomerId(toUUID(strCustomerId));
+        checkCustomerId(customerId, Operation.READ);
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        PageData<EdgeInfo> result;
+        if (type != null && type.trim().length() > 0) {
+            result = edgeService.findEdgeInfosByTenantIdAndCustomerIdAndType(tenantId, customerId, type, pageLink);
+        } else {
+            result = edgeService.findEdgeInfosByTenantIdAndCustomerId(tenantId, customerId, pageLink);
         }
+        return checkNotNull(result);
     }
 
     @ApiOperation(value = "Get Edges By Ids (getEdgesByIds)",
@@ -459,27 +428,23 @@ public class EdgeController extends BaseController {
     @ResponseBody
     public List<Edge> getEdgesByIds(
             @ApiParam(value = "A list of edges ids, separated by comma ','", required = true)
-            @RequestParam("edgeIds") String[] strEdgeIds) throws ThingsboardException {
+            @RequestParam("edgeIds") String[] strEdgeIds) throws ThingsboardException, ExecutionException, InterruptedException {
         checkArrayParameter("edgeIds", strEdgeIds);
-        try {
-            SecurityUser user = getCurrentUser();
-            TenantId tenantId = user.getTenantId();
-            CustomerId customerId = user.getCustomerId();
-            List<EdgeId> edgeIds = new ArrayList<>();
-            for (String strEdgeId : strEdgeIds) {
-                edgeIds.add(new EdgeId(toUUID(strEdgeId)));
-            }
-            ListenableFuture<List<Edge>> edgesFuture;
-            if (customerId == null || customerId.isNullUid()) {
-                edgesFuture = edgeService.findEdgesByTenantIdAndIdsAsync(tenantId, edgeIds);
-            } else {
-                edgesFuture = edgeService.findEdgesByTenantIdCustomerIdAndIdsAsync(tenantId, customerId, edgeIds);
-            }
-            List<Edge> edges = edgesFuture.get();
-            return checkNotNull(edges);
-        } catch (Exception e) {
-            throw handleException(e);
+        SecurityUser user = getCurrentUser();
+        TenantId tenantId = user.getTenantId();
+        CustomerId customerId = user.getCustomerId();
+        List<EdgeId> edgeIds = new ArrayList<>();
+        for (String strEdgeId : strEdgeIds) {
+            edgeIds.add(new EdgeId(toUUID(strEdgeId)));
+        }
+        ListenableFuture<List<Edge>> edgesFuture;
+        if (customerId == null || customerId.isNullUid()) {
+            edgesFuture = edgeService.findEdgesByTenantIdAndIdsAsync(tenantId, edgeIds);
+        } else {
+            edgesFuture = edgeService.findEdgesByTenantIdCustomerIdAndIdsAsync(tenantId, customerId, edgeIds);
         }
+        List<Edge> edges = edgesFuture.get();
+        return checkNotNull(edges);
     }
 
     @ApiOperation(value = "Find related edges (findByQuery)",
@@ -490,27 +455,23 @@ public class EdgeController extends BaseController {
     @PreAuthorize("hasAnyAuthority('TENANT_ADMIN', 'CUSTOMER_USER')")
     @RequestMapping(value = "/edges", method = RequestMethod.POST)
     @ResponseBody
-    public List<Edge> findByQuery(@RequestBody EdgeSearchQuery query) throws ThingsboardException {
+    public List<Edge> findByQuery(@RequestBody EdgeSearchQuery query) throws ThingsboardException, ExecutionException, InterruptedException {
         checkNotNull(query);
         checkNotNull(query.getParameters());
         checkNotNull(query.getEdgeTypes());
         checkEntityId(query.getParameters().getEntityId(), Operation.READ);
-        try {
-            SecurityUser user = getCurrentUser();
-            TenantId tenantId = user.getTenantId();
-            List<Edge> edges = checkNotNull(edgeService.findEdgesByQuery(tenantId, query).get());
-            edges = edges.stream().filter(edge -> {
-                try {
-                    accessControlService.checkPermission(user, Resource.EDGE, Operation.READ, edge.getId(), edge);
-                    return true;
-                } catch (ThingsboardException e) {
-                    return false;
-                }
-            }).collect(Collectors.toList());
-            return edges;
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        SecurityUser user = getCurrentUser();
+        TenantId tenantId = user.getTenantId();
+        List<Edge> edges = checkNotNull(edgeService.findEdgesByQuery(tenantId, query).get());
+        edges = edges.stream().filter(edge -> {
+            try {
+                accessControlService.checkPermission(user, Resource.EDGE, Operation.READ, edge.getId(), edge);
+                return true;
+            } catch (ThingsboardException e) {
+                return false;
+            }
+        }).collect(Collectors.toList());
+        return edges;
     }
 
     @ApiOperation(value = "Get Edge Types (getEdgeTypes)",
@@ -520,15 +481,11 @@ public class EdgeController extends BaseController {
     @PreAuthorize("hasAnyAuthority('TENANT_ADMIN', 'CUSTOMER_USER')")
     @RequestMapping(value = "/edge/types", method = RequestMethod.GET)
     @ResponseBody
-    public List<EntitySubtype> getEdgeTypes() throws ThingsboardException {
-        try {
-            SecurityUser user = getCurrentUser();
-            TenantId tenantId = user.getTenantId();
-            ListenableFuture<List<EntitySubtype>> edgeTypes = edgeService.findEdgeTypesByTenantId(tenantId);
-            return checkNotNull(edgeTypes.get());
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+    public List<EntitySubtype> getEdgeTypes() throws ThingsboardException, ExecutionException, InterruptedException {
+        SecurityUser user = getCurrentUser();
+        TenantId tenantId = user.getTenantId();
+        ListenableFuture<List<EntitySubtype>> edgeTypes = edgeService.findEdgeTypesByTenantId(tenantId);
+        return checkNotNull(edgeTypes.get());
     }
 
     @ApiOperation(value = "Sync edge (syncEdge)",
@@ -537,24 +494,20 @@ public class EdgeController extends BaseController {
     @PreAuthorize("hasAuthority('TENANT_ADMIN')")
     @RequestMapping(value = "/edge/sync/{edgeId}", method = RequestMethod.POST)
     public DeferredResult<ResponseEntity> syncEdge(@ApiParam(value = EDGE_ID_PARAM_DESCRIPTION, required = true)
-                         @PathVariable("edgeId") String strEdgeId) throws ThingsboardException {
+                                                   @PathVariable("edgeId") String strEdgeId) throws ThingsboardException {
         checkParameter("edgeId", strEdgeId);
-        try {
-            final DeferredResult<ResponseEntity> response = new DeferredResult<>();
-            if (isEdgesEnabled()) {
-                EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
-                edgeId = checkNotNull(edgeId);
-                SecurityUser user = getCurrentUser();
-                TenantId tenantId = user.getTenantId();
-                ToEdgeSyncRequest request = new ToEdgeSyncRequest(UUID.randomUUID(), tenantId, edgeId);
-                edgeRpcService.processSyncRequest(request, fromEdgeSyncResponse -> reply(response, fromEdgeSyncResponse));
-            } else {
-                throw new ThingsboardException("Edges support disabled", ThingsboardErrorCode.GENERAL);
-            }
-            return response;
-        } catch (Exception e) {
-            throw handleException(e);
+        final DeferredResult<ResponseEntity> response = new DeferredResult<>();
+        if (isEdgesEnabled()) {
+            EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
+            edgeId = checkNotNull(edgeId);
+            SecurityUser user = getCurrentUser();
+            TenantId tenantId = user.getTenantId();
+            ToEdgeSyncRequest request = new ToEdgeSyncRequest(UUID.randomUUID(), tenantId, edgeId);
+            edgeRpcService.processSyncRequest(request, fromEdgeSyncResponse -> reply(response, fromEdgeSyncResponse));
+        } else {
+            throw new ThingsboardException("Edges support disabled", ThingsboardErrorCode.GENERAL);
         }
+        return response;
     }
 
     private void reply(DeferredResult<ResponseEntity> response, FromEdgeSyncResponse fromEdgeSyncResponse) {
@@ -572,15 +525,11 @@ public class EdgeController extends BaseController {
     @ResponseBody
     public String findMissingToRelatedRuleChains(@ApiParam(value = EDGE_ID_PARAM_DESCRIPTION, required = true)
                                                  @PathVariable("edgeId") String strEdgeId) throws ThingsboardException {
-        try {
-            EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
-            edgeId = checkNotNull(edgeId);
-            SecurityUser user = getCurrentUser();
-            TenantId tenantId = user.getTenantId();
-            return edgeService.findMissingToRelatedRuleChains(tenantId, edgeId, TbRuleChainInputNode.class.getName());
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
+        edgeId = checkNotNull(edgeId);
+        SecurityUser user = getCurrentUser();
+        TenantId tenantId = user.getTenantId();
+        return edgeService.findMissingToRelatedRuleChains(tenantId, edgeId, TbRuleChainInputNode.class.getName());
     }
 
     @ApiOperation(value = "Import the bulk of edges (processEdgesBulkImport)",
@@ -608,13 +557,9 @@ public class EdgeController extends BaseController {
             @ApiParam(value = EDGE_ID_PARAM_DESCRIPTION, required = true)
             @PathVariable("edgeId") String strEdgeId,
             HttpServletRequest request) throws ThingsboardException {
-        try {
-            EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
-            edgeId = checkNotNull(edgeId);
-            Edge edge = checkEdgeId(edgeId, Operation.READ);
-            return checkNotNull(edgeInstallService.getDockerInstallInstructions(getTenantId(), edge, request));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
+        edgeId = checkNotNull(edgeId);
+        Edge edge = checkEdgeId(edgeId, Operation.READ);
+        return checkNotNull(edgeInstallService.getDockerInstallInstructions(getTenantId(), edge, request));
     }
 }
diff --git a/application/src/main/java/org/thingsboard/server/controller/EdgeEventController.java b/application/src/main/java/org/thingsboard/server/controller/EdgeEventController.java
index 5197981876..fc85f439e0 100644
--- a/application/src/main/java/org/thingsboard/server/controller/EdgeEventController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/EdgeEventController.java
@@ -81,14 +81,10 @@ public class EdgeEventController extends BaseController {
             @ApiParam(value = "Timestamp. Edge events with creation time after it won't be queried")
             @RequestParam(required = false) Long endTime) throws ThingsboardException {
         checkParameter(EDGE_ID, strEdgeId);
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
-            checkEdgeId(edgeId, Operation.READ);
-            TimePageLink pageLink = createTimePageLink(pageSize, page, textSearch, sortProperty, sortOrder, startTime, endTime);
-            return checkNotNull(edgeEventService.findEdgeEvents(tenantId, edgeId, pageLink, false));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        TenantId tenantId = getCurrentUser().getTenantId();
+        EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
+        checkEdgeId(edgeId, Operation.READ);
+        TimePageLink pageLink = createTimePageLink(pageSize, page, textSearch, sortProperty, sortOrder, startTime, endTime);
+        return checkNotNull(edgeEventService.findEdgeEvents(tenantId, edgeId, pageLink, false));
     }
 }
diff --git a/application/src/main/java/org/thingsboard/server/controller/EntityRelationController.java b/application/src/main/java/org/thingsboard/server/controller/EntityRelationController.java
index 3e02868208..08448f1d28 100644
--- a/application/src/main/java/org/thingsboard/server/controller/EntityRelationController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/EntityRelationController.java
@@ -41,6 +41,7 @@ import org.thingsboard.server.service.security.model.SecurityUser;
 import org.thingsboard.server.service.security.permission.Operation;
 
 import java.util.List;
+import java.util.concurrent.ExecutionException;
 import java.util.stream.Collectors;
 
 import static org.thingsboard.server.controller.ControllerConstants.ENTITY_ID_PARAM_DESCRIPTION;
@@ -143,21 +144,17 @@ public class EntityRelationController extends BaseController {
                                       @ApiParam(value = RELATION_TYPE_GROUP_PARAM_DESCRIPTION) @RequestParam(value = "relationTypeGroup", required = false) String strRelationTypeGroup,
                                       @ApiParam(value = ENTITY_ID_PARAM_DESCRIPTION, required = true) @RequestParam(TO_ID) String strToId,
                                       @ApiParam(value = ENTITY_TYPE_PARAM_DESCRIPTION, required = true) @RequestParam(TO_TYPE) String strToType) throws ThingsboardException {
-        try {
-            checkParameter(FROM_ID, strFromId);
-            checkParameter(FROM_TYPE, strFromType);
-            checkParameter(RELATION_TYPE, strRelationType);
-            checkParameter(TO_ID, strToId);
-            checkParameter(TO_TYPE, strToType);
-            EntityId fromId = EntityIdFactory.getByTypeAndId(strFromType, strFromId);
-            EntityId toId = EntityIdFactory.getByTypeAndId(strToType, strToId);
-            checkEntityId(fromId, Operation.READ);
-            checkEntityId(toId, Operation.READ);
-            RelationTypeGroup typeGroup = parseRelationTypeGroup(strRelationTypeGroup, RelationTypeGroup.COMMON);
-            return checkNotNull(relationService.getRelation(getTenantId(), fromId, toId, strRelationType, typeGroup));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        checkParameter(FROM_ID, strFromId);
+        checkParameter(FROM_TYPE, strFromType);
+        checkParameter(RELATION_TYPE, strRelationType);
+        checkParameter(TO_ID, strToId);
+        checkParameter(TO_TYPE, strToType);
+        EntityId fromId = EntityIdFactory.getByTypeAndId(strFromType, strFromId);
+        EntityId toId = EntityIdFactory.getByTypeAndId(strToType, strToId);
+        checkEntityId(fromId, Operation.READ);
+        checkEntityId(toId, Operation.READ);
+        RelationTypeGroup typeGroup = parseRelationTypeGroup(strRelationTypeGroup, RelationTypeGroup.COMMON);
+        return checkNotNull(relationService.getRelation(getTenantId(), fromId, toId, strRelationType, typeGroup));
     }
 
     @ApiOperation(value = "Get List of Relations (findByFrom)",
@@ -176,11 +173,7 @@ public class EntityRelationController extends BaseController {
         EntityId entityId = EntityIdFactory.getByTypeAndId(strFromType, strFromId);
         checkEntityId(entityId, Operation.READ);
         RelationTypeGroup typeGroup = parseRelationTypeGroup(strRelationTypeGroup, RelationTypeGroup.COMMON);
-        try {
-            return checkNotNull(filterRelationsByReadPermission(relationService.findByFrom(getTenantId(), entityId, typeGroup)));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return checkNotNull(filterRelationsByReadPermission(relationService.findByFrom(getTenantId(), entityId, typeGroup)));
     }
 
     @ApiOperation(value = "Get List of Relation Infos (findInfoByFrom)",
@@ -193,17 +186,13 @@ public class EntityRelationController extends BaseController {
     public List<EntityRelationInfo> findInfoByFrom(@ApiParam(value = ENTITY_ID_PARAM_DESCRIPTION, required = true) @RequestParam(FROM_ID) String strFromId,
                                                    @ApiParam(value = ENTITY_TYPE_PARAM_DESCRIPTION, required = true) @RequestParam(FROM_TYPE) String strFromType,
                                                    @ApiParam(value = RELATION_TYPE_GROUP_PARAM_DESCRIPTION)
-                                                   @RequestParam(value = "relationTypeGroup", required = false) String strRelationTypeGroup) throws ThingsboardException {
+                                                   @RequestParam(value = "relationTypeGroup", required = false) String strRelationTypeGroup) throws ThingsboardException, ExecutionException, InterruptedException {
         checkParameter(FROM_ID, strFromId);
         checkParameter(FROM_TYPE, strFromType);
         EntityId entityId = EntityIdFactory.getByTypeAndId(strFromType, strFromId);
         checkEntityId(entityId, Operation.READ);
         RelationTypeGroup typeGroup = parseRelationTypeGroup(strRelationTypeGroup, RelationTypeGroup.COMMON);
-        try {
-            return checkNotNull(filterRelationsByReadPermission(relationService.findInfoByFrom(getTenantId(), entityId, typeGroup).get()));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return checkNotNull(filterRelationsByReadPermission(relationService.findInfoByFrom(getTenantId(), entityId, typeGroup).get()));
     }
 
     @ApiOperation(value = "Get List of Relations (findByFrom)",
@@ -224,11 +213,7 @@ public class EntityRelationController extends BaseController {
         EntityId entityId = EntityIdFactory.getByTypeAndId(strFromType, strFromId);
         checkEntityId(entityId, Operation.READ);
         RelationTypeGroup typeGroup = parseRelationTypeGroup(strRelationTypeGroup, RelationTypeGroup.COMMON);
-        try {
-            return checkNotNull(filterRelationsByReadPermission(relationService.findByFromAndType(getTenantId(), entityId, strRelationType, typeGroup)));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return checkNotNull(filterRelationsByReadPermission(relationService.findByFromAndType(getTenantId(), entityId, strRelationType, typeGroup)));
     }
 
     @ApiOperation(value = "Get List of Relations (findByTo)",
@@ -247,11 +232,7 @@ public class EntityRelationController extends BaseController {
         EntityId entityId = EntityIdFactory.getByTypeAndId(strToType, strToId);
         checkEntityId(entityId, Operation.READ);
         RelationTypeGroup typeGroup = parseRelationTypeGroup(strRelationTypeGroup, RelationTypeGroup.COMMON);
-        try {
-            return checkNotNull(filterRelationsByReadPermission(relationService.findByTo(getTenantId(), entityId, typeGroup)));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return checkNotNull(filterRelationsByReadPermission(relationService.findByTo(getTenantId(), entityId, typeGroup)));
     }
 
     @ApiOperation(value = "Get List of Relation Infos (findInfoByTo)",
@@ -264,17 +245,13 @@ public class EntityRelationController extends BaseController {
     public List<EntityRelationInfo> findInfoByTo(@ApiParam(value = ENTITY_ID_PARAM_DESCRIPTION, required = true) @RequestParam(TO_ID) String strToId,
                                                  @ApiParam(value = ENTITY_TYPE_PARAM_DESCRIPTION, required = true) @RequestParam(TO_TYPE) String strToType,
                                                  @ApiParam(value = RELATION_TYPE_GROUP_PARAM_DESCRIPTION)
-                                                 @RequestParam(value = "relationTypeGroup", required = false) String strRelationTypeGroup) throws ThingsboardException {
+                                                 @RequestParam(value = "relationTypeGroup", required = false) String strRelationTypeGroup) throws ThingsboardException, ExecutionException, InterruptedException {
         checkParameter(TO_ID, strToId);
         checkParameter(TO_TYPE, strToType);
         EntityId entityId = EntityIdFactory.getByTypeAndId(strToType, strToId);
         checkEntityId(entityId, Operation.READ);
         RelationTypeGroup typeGroup = parseRelationTypeGroup(strRelationTypeGroup, RelationTypeGroup.COMMON);
-        try {
-            return checkNotNull(filterRelationsByReadPermission(relationService.findInfoByTo(getTenantId(), entityId, typeGroup).get()));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return checkNotNull(filterRelationsByReadPermission(relationService.findInfoByTo(getTenantId(), entityId, typeGroup).get()));
     }
 
     @ApiOperation(value = "Get List of Relations (findByTo)",
@@ -295,11 +272,7 @@ public class EntityRelationController extends BaseController {
         EntityId entityId = EntityIdFactory.getByTypeAndId(strToType, strToId);
         checkEntityId(entityId, Operation.READ);
         RelationTypeGroup typeGroup = parseRelationTypeGroup(strRelationTypeGroup, RelationTypeGroup.COMMON);
-        try {
-            return checkNotNull(filterRelationsByReadPermission(relationService.findByToAndType(getTenantId(), entityId, strRelationType, typeGroup)));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return checkNotNull(filterRelationsByReadPermission(relationService.findByToAndType(getTenantId(), entityId, strRelationType, typeGroup)));
     }
 
     @ApiOperation(value = "Find related entities (findByQuery)",
@@ -310,16 +283,12 @@ public class EntityRelationController extends BaseController {
     @RequestMapping(value = "/relations", method = RequestMethod.POST)
     @ResponseBody
     public List<EntityRelation> findByQuery(@ApiParam(value = "A JSON value representing the entity relations query object.", required = true)
-                                            @RequestBody EntityRelationsQuery query) throws ThingsboardException {
+                                            @RequestBody EntityRelationsQuery query) throws ThingsboardException, ExecutionException, InterruptedException {
         checkNotNull(query);
         checkNotNull(query.getParameters());
         checkNotNull(query.getFilters());
         checkEntityId(query.getParameters().getEntityId(), Operation.READ);
-        try {
-            return checkNotNull(filterRelationsByReadPermission(relationService.findByQuery(getTenantId(), query).get()));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return checkNotNull(filterRelationsByReadPermission(relationService.findByQuery(getTenantId(), query).get()));
     }
 
     @ApiOperation(value = "Find related entity infos (findInfoByQuery)",
@@ -330,16 +299,12 @@ public class EntityRelationController extends BaseController {
     @RequestMapping(value = "/relations/info", method = RequestMethod.POST)
     @ResponseBody
     public List<EntityRelationInfo> findInfoByQuery(@ApiParam(value = "A JSON value representing the entity relations query object.", required = true)
-                                                    @RequestBody EntityRelationsQuery query) throws ThingsboardException {
+                                                    @RequestBody EntityRelationsQuery query) throws ThingsboardException, ExecutionException, InterruptedException {
         checkNotNull(query);
         checkNotNull(query.getParameters());
         checkNotNull(query.getFilters());
         checkEntityId(query.getParameters().getEntityId(), Operation.READ);
-        try {
-            return checkNotNull(filterRelationsByReadPermission(relationService.findInfoByQuery(getTenantId(), query).get()));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return checkNotNull(filterRelationsByReadPermission(relationService.findInfoByQuery(getTenantId(), query).get()));
     }
 
     private void checkCanCreateRelation(EntityId entityId) throws ThingsboardException {
diff --git a/application/src/main/java/org/thingsboard/server/controller/EntityViewController.java b/application/src/main/java/org/thingsboard/server/controller/EntityViewController.java
index 64d0896c6a..b2904a0989 100644
--- a/application/src/main/java/org/thingsboard/server/controller/EntityViewController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/EntityViewController.java
@@ -54,6 +54,7 @@ import org.thingsboard.server.service.security.permission.Operation;
 import org.thingsboard.server.service.security.permission.Resource;
 
 import java.util.List;
+import java.util.concurrent.ExecutionException;
 import java.util.stream.Collectors;
 
 import static org.thingsboard.server.controller.ControllerConstants.CUSTOMER_ID;
@@ -105,11 +106,7 @@ public class EntityViewController extends BaseController {
             @ApiParam(value = ENTITY_VIEW_ID_PARAM_DESCRIPTION)
             @PathVariable(ENTITY_VIEW_ID) String strEntityViewId) throws ThingsboardException {
         checkParameter(ENTITY_VIEW_ID, strEntityViewId);
-        try {
-            return checkEntityViewId(new EntityViewId(toUUID(strEntityViewId)), Operation.READ);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return checkEntityViewId(new EntityViewId(toUUID(strEntityViewId)), Operation.READ);
     }
 
     @ApiOperation(value = "Get Entity View info (getEntityViewInfoById)",
@@ -123,12 +120,8 @@ public class EntityViewController extends BaseController {
             @ApiParam(value = ENTITY_VIEW_ID_PARAM_DESCRIPTION)
             @PathVariable(ENTITY_VIEW_ID) String strEntityViewId) throws ThingsboardException {
         checkParameter(ENTITY_VIEW_ID, strEntityViewId);
-        try {
-            EntityViewId entityViewId = new EntityViewId(toUUID(strEntityViewId));
-            return checkEntityViewInfoId(entityViewId, Operation.READ);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        EntityViewId entityViewId = new EntityViewId(toUUID(strEntityViewId));
+        return checkEntityViewInfoId(entityViewId, Operation.READ);
     }
 
     @ApiOperation(value = "Save or update entity view (saveEntityView)",
@@ -177,12 +170,8 @@ public class EntityViewController extends BaseController {
     public EntityView getTenantEntityView(
             @ApiParam(value = "Entity View name")
             @RequestParam String entityViewName) throws ThingsboardException {
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            return checkNotNull(entityViewService.findEntityViewByTenantIdAndName(tenantId, entityViewName));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        TenantId tenantId = getCurrentUser().getTenantId();
+        return checkNotNull(entityViewService.findEntityViewByTenantIdAndName(tenantId, entityViewName));
     }
 
     @ApiOperation(value = "Assign Entity View to customer (assignEntityViewToCustomer)",
@@ -249,18 +238,14 @@ public class EntityViewController extends BaseController {
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
         checkParameter(CUSTOMER_ID, strCustomerId);
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            CustomerId customerId = new CustomerId(toUUID(strCustomerId));
-            checkCustomerId(customerId, Operation.READ);
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            if (type != null && type.trim().length() > 0) {
-                return checkNotNull(entityViewService.findEntityViewsByTenantIdAndCustomerIdAndType(tenantId, customerId, pageLink, type));
-            } else {
-                return checkNotNull(entityViewService.findEntityViewsByTenantIdAndCustomerId(tenantId, customerId, pageLink));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        CustomerId customerId = new CustomerId(toUUID(strCustomerId));
+        checkCustomerId(customerId, Operation.READ);
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        if (type != null && type.trim().length() > 0) {
+            return checkNotNull(entityViewService.findEntityViewsByTenantIdAndCustomerIdAndType(tenantId, customerId, pageLink, type));
+        } else {
+            return checkNotNull(entityViewService.findEntityViewsByTenantIdAndCustomerId(tenantId, customerId, pageLink));
         }
     }
 
@@ -286,18 +271,14 @@ public class EntityViewController extends BaseController {
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
         checkParameter("customerId", strCustomerId);
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            CustomerId customerId = new CustomerId(toUUID(strCustomerId));
-            checkCustomerId(customerId, Operation.READ);
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            if (type != null && type.trim().length() > 0) {
-                return checkNotNull(entityViewService.findEntityViewInfosByTenantIdAndCustomerIdAndType(tenantId, customerId, type, pageLink));
-            } else {
-                return checkNotNull(entityViewService.findEntityViewInfosByTenantIdAndCustomerId(tenantId, customerId, pageLink));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        CustomerId customerId = new CustomerId(toUUID(strCustomerId));
+        checkCustomerId(customerId, Operation.READ);
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        if (type != null && type.trim().length() > 0) {
+            return checkNotNull(entityViewService.findEntityViewInfosByTenantIdAndCustomerIdAndType(tenantId, customerId, type, pageLink));
+        } else {
+            return checkNotNull(entityViewService.findEntityViewInfosByTenantIdAndCustomerId(tenantId, customerId, pageLink));
         }
     }
 
@@ -320,17 +301,13 @@ public class EntityViewController extends BaseController {
             @RequestParam(required = false) String sortProperty,
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-
-            if (type != null && type.trim().length() > 0) {
-                return checkNotNull(entityViewService.findEntityViewByTenantIdAndType(tenantId, pageLink, type));
-            } else {
-                return checkNotNull(entityViewService.findEntityViewByTenantId(tenantId, pageLink));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+
+        if (type != null && type.trim().length() > 0) {
+            return checkNotNull(entityViewService.findEntityViewByTenantIdAndType(tenantId, pageLink, type));
+        } else {
+            return checkNotNull(entityViewService.findEntityViewByTenantId(tenantId, pageLink));
         }
     }
 
@@ -353,16 +330,12 @@ public class EntityViewController extends BaseController {
             @RequestParam(required = false) String sortProperty,
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            if (type != null && type.trim().length() > 0) {
-                return checkNotNull(entityViewService.findEntityViewInfosByTenantIdAndType(tenantId, type, pageLink));
-            } else {
-                return checkNotNull(entityViewService.findEntityViewInfosByTenantId(tenantId, pageLink));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        if (type != null && type.trim().length() > 0) {
+            return checkNotNull(entityViewService.findEntityViewInfosByTenantIdAndType(tenantId, type, pageLink));
+        } else {
+            return checkNotNull(entityViewService.findEntityViewInfosByTenantId(tenantId, pageLink));
         }
     }
 
@@ -375,25 +348,21 @@ public class EntityViewController extends BaseController {
     @ResponseBody
     public List<EntityView> findByQuery(
             @ApiParam(value = "The entity view search query JSON")
-            @RequestBody EntityViewSearchQuery query) throws ThingsboardException {
+            @RequestBody EntityViewSearchQuery query) throws ThingsboardException, ExecutionException, InterruptedException {
         checkNotNull(query);
         checkNotNull(query.getParameters());
         checkNotNull(query.getEntityViewTypes());
         checkEntityId(query.getParameters().getEntityId(), Operation.READ);
-        try {
-            List<EntityView> entityViews = checkNotNull(entityViewService.findEntityViewsByQuery(getTenantId(), query).get());
-            entityViews = entityViews.stream().filter(entityView -> {
-                try {
-                    accessControlService.checkPermission(getCurrentUser(), Resource.ENTITY_VIEW, Operation.READ, entityView.getId(), entityView);
-                    return true;
-                } catch (ThingsboardException e) {
-                    return false;
-                }
-            }).collect(Collectors.toList());
-            return entityViews;
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        List<EntityView> entityViews = checkNotNull(entityViewService.findEntityViewsByQuery(getTenantId(), query).get());
+        entityViews = entityViews.stream().filter(entityView -> {
+            try {
+                accessControlService.checkPermission(getCurrentUser(), Resource.ENTITY_VIEW, Operation.READ, entityView.getId(), entityView);
+                return true;
+            } catch (ThingsboardException e) {
+                return false;
+            }
+        }).collect(Collectors.toList());
+        return entityViews;
     }
 
     @ApiOperation(value = "Get Entity View Types (getEntityViewTypes)",
@@ -402,15 +371,11 @@ public class EntityViewController extends BaseController {
     @PreAuthorize("hasAnyAuthority('TENANT_ADMIN', 'CUSTOMER_USER')")
     @RequestMapping(value = "/entityView/types", method = RequestMethod.GET)
     @ResponseBody
-    public List<EntitySubtype> getEntityViewTypes() throws ThingsboardException {
-        try {
-            SecurityUser user = getCurrentUser();
-            TenantId tenantId = user.getTenantId();
-            ListenableFuture<List<EntitySubtype>> entityViewTypes = entityViewService.findEntityViewTypesByTenantId(tenantId);
-            return checkNotNull(entityViewTypes.get());
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+    public List<EntitySubtype> getEntityViewTypes() throws ThingsboardException, ExecutionException, InterruptedException {
+        SecurityUser user = getCurrentUser();
+        TenantId tenantId = user.getTenantId();
+        ListenableFuture<List<EntitySubtype>> entityViewTypes = entityViewService.findEntityViewTypesByTenantId(tenantId);
+        return checkNotNull(entityViewTypes.get());
     }
 
     @ApiOperation(value = "Make entity view publicly available (assignEntityViewToPublicCustomer)",
@@ -493,32 +458,28 @@ public class EntityViewController extends BaseController {
             @RequestParam(required = false) Long startTime,
             @RequestParam(required = false) Long endTime) throws ThingsboardException {
         checkParameter(EDGE_ID, strEdgeId);
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
-            checkEdgeId(edgeId, Operation.READ);
-            TimePageLink pageLink = createTimePageLink(pageSize, page, textSearch, sortProperty, sortOrder, startTime, endTime);
-            PageData<EntityView> nonFilteredResult;
-            if (type != null && type.trim().length() > 0) {
-                nonFilteredResult = entityViewService.findEntityViewsByTenantIdAndEdgeIdAndType(tenantId, edgeId, type, pageLink);
-            } else {
-                nonFilteredResult = entityViewService.findEntityViewsByTenantIdAndEdgeId(tenantId, edgeId, pageLink);
-            }
-            List<EntityView> filteredEntityViews = nonFilteredResult.getData().stream().filter(entityView -> {
-                try {
-                    accessControlService.checkPermission(getCurrentUser(), Resource.ENTITY_VIEW, Operation.READ, entityView.getId(), entityView);
-                    return true;
-                } catch (ThingsboardException e) {
-                    return false;
-                }
-            }).collect(Collectors.toList());
-            PageData<EntityView> filteredResult = new PageData<>(filteredEntityViews,
-                    nonFilteredResult.getTotalPages(),
-                    nonFilteredResult.getTotalElements(),
-                    nonFilteredResult.hasNext());
-            return checkNotNull(filteredResult);
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
+        checkEdgeId(edgeId, Operation.READ);
+        TimePageLink pageLink = createTimePageLink(pageSize, page, textSearch, sortProperty, sortOrder, startTime, endTime);
+        PageData<EntityView> nonFilteredResult;
+        if (type != null && type.trim().length() > 0) {
+            nonFilteredResult = entityViewService.findEntityViewsByTenantIdAndEdgeIdAndType(tenantId, edgeId, type, pageLink);
+        } else {
+            nonFilteredResult = entityViewService.findEntityViewsByTenantIdAndEdgeId(tenantId, edgeId, pageLink);
         }
+        List<EntityView> filteredEntityViews = nonFilteredResult.getData().stream().filter(entityView -> {
+            try {
+                accessControlService.checkPermission(getCurrentUser(), Resource.ENTITY_VIEW, Operation.READ, entityView.getId(), entityView);
+                return true;
+            } catch (ThingsboardException e) {
+                return false;
+            }
+        }).collect(Collectors.toList());
+        PageData<EntityView> filteredResult = new PageData<>(filteredEntityViews,
+                nonFilteredResult.getTotalPages(),
+                nonFilteredResult.getTotalElements(),
+                nonFilteredResult.hasNext());
+        return checkNotNull(filteredResult);
     }
 }
diff --git a/application/src/main/java/org/thingsboard/server/controller/EventController.java b/application/src/main/java/org/thingsboard/server/controller/EventController.java
index f01af0558f..59fb18d82e 100644
--- a/application/src/main/java/org/thingsboard/server/controller/EventController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/EventController.java
@@ -248,14 +248,10 @@ public class EventController extends BaseController {
                             @RequestBody EventFilter eventFilter) throws ThingsboardException {
         checkParameter("EntityId", strEntityId);
         checkParameter("EntityType", strEntityType);
-        try {
-            EntityId entityId = EntityIdFactory.getByTypeAndId(strEntityType, strEntityId);
-            checkEntityId(entityId, Operation.WRITE);
+        EntityId entityId = EntityIdFactory.getByTypeAndId(strEntityType, strEntityId);
+        checkEntityId(entityId, Operation.WRITE);
 
-            eventService.removeEvents(getTenantId(), entityId, eventFilter, startTime, endTime);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        eventService.removeEvents(getTenantId(), entityId, eventFilter, startTime, endTime);
     }
 
     private static EventType resolveEventType(String eventType) throws ThingsboardException {
diff --git a/application/src/main/java/org/thingsboard/server/controller/Lwm2mController.java b/application/src/main/java/org/thingsboard/server/controller/Lwm2mController.java
index 18f01d553e..ae1dec43fe 100644
--- a/application/src/main/java/org/thingsboard/server/controller/Lwm2mController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/Lwm2mController.java
@@ -64,11 +64,7 @@ public class Lwm2mController extends BaseController {
     public LwM2MServerSecurityConfigDefault getLwm2mBootstrapSecurityInfo(
         @ApiParam(value = IS_BOOTSTRAP_SERVER_PARAM_DESCRIPTION)
         @PathVariable(IS_BOOTSTRAP_SERVER) boolean bootstrapServer) throws ThingsboardException {
-            try {
-                return lwM2MService.getServerSecurityInfo(bootstrapServer);
-            } catch (Exception e) {
-                throw handleException(e);
-            }
+            return lwM2MService.getServerSecurityInfo(bootstrapServer);
     }
 
     @ApiOperation(hidden = true, value = "Save device with credentials (Deprecated)")
diff --git a/application/src/main/java/org/thingsboard/server/controller/OAuth2ConfigTemplateController.java b/application/src/main/java/org/thingsboard/server/controller/OAuth2ConfigTemplateController.java
index 2fc2d30869..f547a5f0ad 100644
--- a/application/src/main/java/org/thingsboard/server/controller/OAuth2ConfigTemplateController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/OAuth2ConfigTemplateController.java
@@ -54,12 +54,8 @@ public class OAuth2ConfigTemplateController extends BaseController {
     @RequestMapping(method = RequestMethod.POST)
     @ResponseStatus(value = HttpStatus.OK)
     public OAuth2ClientRegistrationTemplate saveClientRegistrationTemplate(@RequestBody OAuth2ClientRegistrationTemplate clientRegistrationTemplate) throws ThingsboardException {
-        try {
-            accessControlService.checkPermission(getCurrentUser(), Resource.OAUTH2_CONFIGURATION_TEMPLATE, Operation.WRITE);
-            return oAuth2ConfigTemplateService.saveClientRegistrationTemplate(clientRegistrationTemplate);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        accessControlService.checkPermission(getCurrentUser(), Resource.OAUTH2_CONFIGURATION_TEMPLATE, Operation.WRITE);
+        return oAuth2ConfigTemplateService.saveClientRegistrationTemplate(clientRegistrationTemplate);
     }
 
     @ApiOperation(value = "Delete OAuth2 client registration template by id (deleteClientRegistrationTemplate)" + SYSTEM_AUTHORITY_PARAGRAPH,
@@ -70,13 +66,9 @@ public class OAuth2ConfigTemplateController extends BaseController {
     public void deleteClientRegistrationTemplate(@ApiParam(value = "String representation of client registration template id to delete", example = "139b1f81-2f5d-11ec-9dbe-9b627e1a88f4")
                                                  @PathVariable(CLIENT_REGISTRATION_TEMPLATE_ID) String strClientRegistrationTemplateId) throws ThingsboardException {
         checkParameter(CLIENT_REGISTRATION_TEMPLATE_ID, strClientRegistrationTemplateId);
-        try {
-            accessControlService.checkPermission(getCurrentUser(), Resource.OAUTH2_CONFIGURATION_TEMPLATE, Operation.DELETE);
-            OAuth2ClientRegistrationTemplateId clientRegistrationTemplateId = new OAuth2ClientRegistrationTemplateId(toUUID(strClientRegistrationTemplateId));
-            oAuth2ConfigTemplateService.deleteClientRegistrationTemplateById(clientRegistrationTemplateId);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        accessControlService.checkPermission(getCurrentUser(), Resource.OAUTH2_CONFIGURATION_TEMPLATE, Operation.DELETE);
+        OAuth2ClientRegistrationTemplateId clientRegistrationTemplateId = new OAuth2ClientRegistrationTemplateId(toUUID(strClientRegistrationTemplateId));
+        oAuth2ConfigTemplateService.deleteClientRegistrationTemplateById(clientRegistrationTemplateId);
     }
 
     @ApiOperation(value = "Get the list of all OAuth2 client registration templates (getClientRegistrationTemplates)" + SYSTEM_OR_TENANT_AUTHORITY_PARAGRAPH,
@@ -85,12 +77,8 @@ public class OAuth2ConfigTemplateController extends BaseController {
     @RequestMapping(method = RequestMethod.GET, produces = "application/json")
     @ResponseBody
     public List<OAuth2ClientRegistrationTemplate> getClientRegistrationTemplates() throws ThingsboardException {
-        try {
-            accessControlService.checkPermission(getCurrentUser(), Resource.OAUTH2_CONFIGURATION_TEMPLATE, Operation.READ);
-            return oAuth2ConfigTemplateService.findAllClientRegistrationTemplates();
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        accessControlService.checkPermission(getCurrentUser(), Resource.OAUTH2_CONFIGURATION_TEMPLATE, Operation.READ);
+        return oAuth2ConfigTemplateService.findAllClientRegistrationTemplates();
     }
 
 }
diff --git a/application/src/main/java/org/thingsboard/server/controller/OAuth2Controller.java b/application/src/main/java/org/thingsboard/server/controller/OAuth2Controller.java
index db00287ee7..ef5739a481 100644
--- a/application/src/main/java/org/thingsboard/server/controller/OAuth2Controller.java
+++ b/application/src/main/java/org/thingsboard/server/controller/OAuth2Controller.java
@@ -69,25 +69,21 @@ public class OAuth2Controller extends BaseController {
                                                            "If platform type is not one of allowable values - it will just be ignored",
                                                            allowableValues = "WEB, ANDROID, IOS")
                                                    @RequestParam(required = false) String platform) throws ThingsboardException {
-        try {
-            if (log.isDebugEnabled()) {
-                log.debug("Executing getOAuth2Clients: [{}][{}][{}]", request.getScheme(), request.getServerName(), request.getServerPort());
-                Enumeration<String> headerNames = request.getHeaderNames();
-                while (headerNames.hasMoreElements()) {
-                    String header = headerNames.nextElement();
-                    log.debug("Header: {} {}", header, request.getHeader(header));
-                }
+        if (log.isDebugEnabled()) {
+            log.debug("Executing getOAuth2Clients: [{}][{}][{}]", request.getScheme(), request.getServerName(), request.getServerPort());
+            Enumeration<String> headerNames = request.getHeaderNames();
+            while (headerNames.hasMoreElements()) {
+                String header = headerNames.nextElement();
+                log.debug("Header: {} {}", header, request.getHeader(header));
             }
-            PlatformType platformType = null;
-            if (StringUtils.isNotEmpty(platform)) {
-                try {
-                    platformType = PlatformType.valueOf(platform);
-                } catch (Exception e) {}
-            }
-            return oAuth2Service.getOAuth2Clients(MiscUtils.getScheme(request), MiscUtils.getDomainNameAndPort(request), pkgName, platformType);
-        } catch (Exception e) {
-            throw handleException(e);
         }
+        PlatformType platformType = null;
+        if (StringUtils.isNotEmpty(platform)) {
+            try {
+                platformType = PlatformType.valueOf(platform);
+            } catch (Exception e) {}
+        }
+        return oAuth2Service.getOAuth2Clients(MiscUtils.getScheme(request), MiscUtils.getDomainNameAndPort(request), pkgName, platformType);
     }
 
     @ApiOperation(value = "Get current OAuth2 settings (getCurrentOAuth2Info)", notes = SYSTEM_AUTHORITY_PARAGRAPH)
@@ -95,12 +91,8 @@ public class OAuth2Controller extends BaseController {
     @RequestMapping(value = "/oauth2/config", method = RequestMethod.GET, produces = "application/json")
     @ResponseBody
     public OAuth2Info getCurrentOAuth2Info() throws ThingsboardException {
-        try {
-            accessControlService.checkPermission(getCurrentUser(), Resource.OAUTH2_CONFIGURATION_INFO, Operation.READ);
-            return oAuth2Service.findOAuth2Info();
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        accessControlService.checkPermission(getCurrentUser(), Resource.OAUTH2_CONFIGURATION_INFO, Operation.READ);
+        return oAuth2Service.findOAuth2Info();
     }
 
     @ApiOperation(value = "Save OAuth2 settings (saveOAuth2Info)", notes = SYSTEM_AUTHORITY_PARAGRAPH)
@@ -108,13 +100,9 @@ public class OAuth2Controller extends BaseController {
     @RequestMapping(value = "/oauth2/config", method = RequestMethod.POST)
     @ResponseStatus(value = HttpStatus.OK)
     public OAuth2Info saveOAuth2Info(@RequestBody OAuth2Info oauth2Info) throws ThingsboardException {
-        try {
-            accessControlService.checkPermission(getCurrentUser(), Resource.OAUTH2_CONFIGURATION_INFO, Operation.WRITE);
-            oAuth2Service.saveOAuth2Info(oauth2Info);
-            return oAuth2Service.findOAuth2Info();
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        accessControlService.checkPermission(getCurrentUser(), Resource.OAUTH2_CONFIGURATION_INFO, Operation.WRITE);
+        oAuth2Service.saveOAuth2Info(oauth2Info);
+        return oAuth2Service.findOAuth2Info();
     }
 
     @ApiOperation(value = "Get OAuth2 log in processing URL (getLoginProcessingUrl)", notes = "Returns the URL enclosed in " +
@@ -125,12 +113,8 @@ public class OAuth2Controller extends BaseController {
     @RequestMapping(value = "/oauth2/loginProcessingUrl", method = RequestMethod.GET)
     @ResponseBody
     public String getLoginProcessingUrl() throws ThingsboardException {
-        try {
-            accessControlService.checkPermission(getCurrentUser(), Resource.OAUTH2_CONFIGURATION_INFO, Operation.READ);
-            return "\"" + oAuth2Configuration.getLoginProcessingUrl() + "\"";
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        accessControlService.checkPermission(getCurrentUser(), Resource.OAUTH2_CONFIGURATION_INFO, Operation.READ);
+        return "\"" + oAuth2Configuration.getLoginProcessingUrl() + "\"";
     }
 
 }
diff --git a/application/src/main/java/org/thingsboard/server/controller/OtaPackageController.java b/application/src/main/java/org/thingsboard/server/controller/OtaPackageController.java
index 326303110e..9b923e01dc 100644
--- a/application/src/main/java/org/thingsboard/server/controller/OtaPackageController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/OtaPackageController.java
@@ -87,24 +87,20 @@ public class OtaPackageController extends BaseController {
     public ResponseEntity<org.springframework.core.io.Resource> downloadOtaPackage(@ApiParam(value = OTA_PACKAGE_ID_PARAM_DESCRIPTION)
                                                                                    @PathVariable(OTA_PACKAGE_ID) String strOtaPackageId) throws ThingsboardException {
         checkParameter(OTA_PACKAGE_ID, strOtaPackageId);
-        try {
-            OtaPackageId otaPackageId = new OtaPackageId(toUUID(strOtaPackageId));
-            OtaPackage otaPackage = checkOtaPackageId(otaPackageId, Operation.READ);
-
-            if (otaPackage.hasUrl()) {
-                return ResponseEntity.badRequest().build();
-            }
+        OtaPackageId otaPackageId = new OtaPackageId(toUUID(strOtaPackageId));
+        OtaPackage otaPackage = checkOtaPackageId(otaPackageId, Operation.READ);
 
-            ByteArrayResource resource = new ByteArrayResource(otaPackage.getData().array());
-            return ResponseEntity.ok()
-                    .header(HttpHeaders.CONTENT_DISPOSITION, "attachment;filename=" + otaPackage.getFileName())
-                    .header("x-filename", otaPackage.getFileName())
-                    .contentLength(resource.contentLength())
-                    .contentType(parseMediaType(otaPackage.getContentType()))
-                    .body(resource);
-        } catch (Exception e) {
-            throw handleException(e);
+        if (otaPackage.hasUrl()) {
+            return ResponseEntity.badRequest().build();
         }
+
+        ByteArrayResource resource = new ByteArrayResource(otaPackage.getData().array());
+        return ResponseEntity.ok()
+                .header(HttpHeaders.CONTENT_DISPOSITION, "attachment;filename=" + otaPackage.getFileName())
+                .header("x-filename", otaPackage.getFileName())
+                .contentLength(resource.contentLength())
+                .contentType(parseMediaType(otaPackage.getContentType()))
+                .body(resource);
     }
 
     @ApiOperation(value = "Get OTA Package Info (getOtaPackageInfoById)",
@@ -117,12 +113,8 @@ public class OtaPackageController extends BaseController {
     public OtaPackageInfo getOtaPackageInfoById(@ApiParam(value = OTA_PACKAGE_ID_PARAM_DESCRIPTION)
                                                 @PathVariable(OTA_PACKAGE_ID) String strOtaPackageId) throws ThingsboardException {
         checkParameter(OTA_PACKAGE_ID, strOtaPackageId);
-        try {
-            OtaPackageId otaPackageId = new OtaPackageId(toUUID(strOtaPackageId));
-            return checkNotNull(otaPackageService.findOtaPackageInfoById(getTenantId(), otaPackageId));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        OtaPackageId otaPackageId = new OtaPackageId(toUUID(strOtaPackageId));
+        return checkNotNull(otaPackageService.findOtaPackageInfoById(getTenantId(), otaPackageId));
     }
 
     @ApiOperation(value = "Get OTA Package (getOtaPackageById)",
@@ -135,12 +127,8 @@ public class OtaPackageController extends BaseController {
     public OtaPackage getOtaPackageById(@ApiParam(value = OTA_PACKAGE_ID_PARAM_DESCRIPTION)
                                         @PathVariable(OTA_PACKAGE_ID) String strOtaPackageId) throws ThingsboardException {
         checkParameter(OTA_PACKAGE_ID, strOtaPackageId);
-        try {
-            OtaPackageId otaPackageId = new OtaPackageId(toUUID(strOtaPackageId));
-            return checkOtaPackageId(otaPackageId, Operation.READ);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        OtaPackageId otaPackageId = new OtaPackageId(toUUID(strOtaPackageId));
+        return checkOtaPackageId(otaPackageId, Operation.READ);
     }
 
     @ApiOperation(value = "Create Or Update OTA Package Info (saveOtaPackageInfo)",
@@ -204,12 +192,8 @@ public class OtaPackageController extends BaseController {
                                                    @RequestParam(required = false) String sortProperty,
                                                    @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
                                                    @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            return checkNotNull(otaPackageService.findTenantOtaPackagesByTenantId(getTenantId(), pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        return checkNotNull(otaPackageService.findTenantOtaPackagesByTenantId(getTenantId(), pageLink));
     }
 
     @ApiOperation(value = "Get OTA Package Infos (getOtaPackages)",
@@ -235,13 +219,9 @@ public class OtaPackageController extends BaseController {
                                                    @RequestParam(required = false) String sortOrder) throws ThingsboardException {
         checkParameter("deviceProfileId", strDeviceProfileId);
         checkParameter("type", strType);
-        try {
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            return checkNotNull(otaPackageService.findTenantOtaPackagesByTenantIdAndDeviceProfileIdAndTypeAndHasData(getTenantId(),
-                    new DeviceProfileId(toUUID(strDeviceProfileId)), OtaPackageType.valueOf(strType), pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        return checkNotNull(otaPackageService.findTenantOtaPackagesByTenantIdAndDeviceProfileIdAndTypeAndHasData(getTenantId(),
+                new DeviceProfileId(toUUID(strDeviceProfileId)), OtaPackageType.valueOf(strType), pageLink));
     }
 
     @ApiOperation(value = "Delete OTA Package (deleteOtaPackage)",
diff --git a/application/src/main/java/org/thingsboard/server/controller/RpcV2Controller.java b/application/src/main/java/org/thingsboard/server/controller/RpcV2Controller.java
index 916228147e..28f7f44e5f 100644
--- a/application/src/main/java/org/thingsboard/server/controller/RpcV2Controller.java
+++ b/application/src/main/java/org/thingsboard/server/controller/RpcV2Controller.java
@@ -159,12 +159,8 @@ public class RpcV2Controller extends AbstractRpcController {
             @ApiParam(value = RPC_ID_PARAM_DESCRIPTION, required = true)
             @PathVariable(RPC_ID) String strRpc) throws ThingsboardException {
         checkParameter("RpcId", strRpc);
-        try {
-            RpcId rpcId = new RpcId(UUID.fromString(strRpc));
-            return checkRpcId(rpcId, Operation.READ);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        RpcId rpcId = new RpcId(UUID.fromString(strRpc));
+        return checkRpcId(rpcId, Operation.READ);
     }
 
     @ApiOperation(value = "Get persistent RPC requests", notes = "Allows to query RPC calls for specific device using pagination." + TENANT_OR_CUSTOMER_AUTHORITY_PARAGRAPH)
@@ -187,43 +183,39 @@ public class RpcV2Controller extends AbstractRpcController {
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
         checkParameter("DeviceId", strDeviceId);
-        try {
-            if (rpcStatus != null && rpcStatus.equals(RpcStatus.DELETED)) {
-                throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "RpcStatus: DELETED");
-            }
-
-            TenantId tenantId = getCurrentUser().getTenantId();
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            DeviceId deviceId = new DeviceId(UUID.fromString(strDeviceId));
-            final DeferredResult<ResponseEntity> response = new DeferredResult<>();
+        if (rpcStatus != null && rpcStatus.equals(RpcStatus.DELETED)) {
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "RpcStatus: DELETED");
+        }
 
-            accessValidator.validate(getCurrentUser(), Operation.RPC_CALL, deviceId, new HttpValidationCallback(response, new FutureCallback<>() {
-                @Override
-                public void onSuccess(@Nullable DeferredResult<ResponseEntity> result) {
-                    PageData<Rpc> rpcCalls;
-                    if (rpcStatus != null) {
-                        rpcCalls = rpcService.findAllByDeviceIdAndStatus(tenantId, deviceId, rpcStatus, pageLink);
-                    } else {
-                        rpcCalls = rpcService.findAllByDeviceId(tenantId, deviceId, pageLink);
-                    }
-                    response.setResult(new ResponseEntity<>(rpcCalls, HttpStatus.OK));
+        TenantId tenantId = getCurrentUser().getTenantId();
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        DeviceId deviceId = new DeviceId(UUID.fromString(strDeviceId));
+        final DeferredResult<ResponseEntity> response = new DeferredResult<>();
+
+        accessValidator.validate(getCurrentUser(), Operation.RPC_CALL, deviceId, new HttpValidationCallback(response, new FutureCallback<>() {
+            @Override
+            public void onSuccess(@Nullable DeferredResult<ResponseEntity> result) {
+                PageData<Rpc> rpcCalls;
+                if (rpcStatus != null) {
+                    rpcCalls = rpcService.findAllByDeviceIdAndStatus(tenantId, deviceId, rpcStatus, pageLink);
+                } else {
+                    rpcCalls = rpcService.findAllByDeviceId(tenantId, deviceId, pageLink);
                 }
+                response.setResult(new ResponseEntity<>(rpcCalls, HttpStatus.OK));
+            }
 
-                @Override
-                public void onFailure(Throwable e) {
-                    ResponseEntity entity;
-                    if (e instanceof ToErrorResponseEntity) {
-                        entity = ((ToErrorResponseEntity) e).toErrorResponseEntity();
-                    } else {
-                        entity = new ResponseEntity(HttpStatus.UNAUTHORIZED);
-                    }
-                    response.setResult(entity);
+            @Override
+            public void onFailure(Throwable e) {
+                ResponseEntity entity;
+                if (e instanceof ToErrorResponseEntity) {
+                    entity = ((ToErrorResponseEntity) e).toErrorResponseEntity();
+                } else {
+                    entity = new ResponseEntity(HttpStatus.UNAUTHORIZED);
                 }
-            }));
-            return response;
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+                response.setResult(entity);
+            }
+        }));
+        return response;
     }
 
     @ApiOperation(value = "Delete persistent RPC", notes = "Deletes the persistent RPC request." + TENANT_AUTHORITY_PARAGRAPH)
@@ -234,25 +226,21 @@ public class RpcV2Controller extends AbstractRpcController {
             @ApiParam(value = RPC_ID_PARAM_DESCRIPTION, required = true)
             @PathVariable(RPC_ID) String strRpc) throws ThingsboardException {
         checkParameter("RpcId", strRpc);
-        try {
-            RpcId rpcId = new RpcId(UUID.fromString(strRpc));
-            Rpc rpc = checkRpcId(rpcId, Operation.DELETE);
-
-            if (rpc != null) {
-                if (rpc.getStatus().equals(RpcStatus.QUEUED)) {
-                    RemoveRpcActorMsg removeMsg = new RemoveRpcActorMsg(getTenantId(), rpc.getDeviceId(), rpc.getUuidId());
-                    log.trace("[{}] Forwarding msg {} to queue actor!", rpc.getDeviceId(), rpc);
-                    tbClusterService.pushMsgToCore(removeMsg, null);
-                }
+        RpcId rpcId = new RpcId(UUID.fromString(strRpc));
+        Rpc rpc = checkRpcId(rpcId, Operation.DELETE);
+
+        if (rpc != null) {
+            if (rpc.getStatus().equals(RpcStatus.QUEUED)) {
+                RemoveRpcActorMsg removeMsg = new RemoveRpcActorMsg(getTenantId(), rpc.getDeviceId(), rpc.getUuidId());
+                log.trace("[{}] Forwarding msg {} to queue actor!", rpc.getDeviceId(), rpc);
+                tbClusterService.pushMsgToCore(removeMsg, null);
+            }
 
-                rpcService.deleteRpc(getTenantId(), rpcId);
-                rpc.setStatus(RpcStatus.DELETED);
+            rpcService.deleteRpc(getTenantId(), rpcId);
+            rpc.setStatus(RpcStatus.DELETED);
 
-                TbMsg msg = TbMsg.newMsg(RPC_DELETED, rpc.getDeviceId(), TbMsgMetaData.EMPTY, JacksonUtil.toString(rpc));
-                tbClusterService.pushMsgToRuleEngine(getTenantId(), rpc.getDeviceId(), msg, null);
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+            TbMsg msg = TbMsg.newMsg(RPC_DELETED, rpc.getDeviceId(), TbMsgMetaData.EMPTY, JacksonUtil.toString(rpc));
+            tbClusterService.pushMsgToRuleEngine(getTenantId(), rpc.getDeviceId(), msg, null);
         }
     }
 }
diff --git a/application/src/main/java/org/thingsboard/server/controller/RuleChainController.java b/application/src/main/java/org/thingsboard/server/controller/RuleChainController.java
index 16e15969f4..81cf8be9fa 100644
--- a/application/src/main/java/org/thingsboard/server/controller/RuleChainController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/RuleChainController.java
@@ -15,6 +15,7 @@
  */
 package org.thingsboard.server.controller;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
@@ -166,12 +167,8 @@ public class RuleChainController extends BaseController {
             @ApiParam(value = RULE_CHAIN_ID_PARAM_DESCRIPTION)
             @PathVariable(RULE_CHAIN_ID) String strRuleChainId) throws ThingsboardException {
         checkParameter(RULE_CHAIN_ID, strRuleChainId);
-        try {
-            RuleChainId ruleChainId = new RuleChainId(toUUID(strRuleChainId));
-            return checkRuleChain(ruleChainId, Operation.READ);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        RuleChainId ruleChainId = new RuleChainId(toUUID(strRuleChainId));
+        return checkRuleChain(ruleChainId, Operation.READ);
     }
 
     @ApiOperation(value = "Get Rule Chain output labels (getRuleChainOutputLabels)",
@@ -184,13 +181,9 @@ public class RuleChainController extends BaseController {
             @ApiParam(value = RULE_CHAIN_ID_PARAM_DESCRIPTION)
             @PathVariable(RULE_CHAIN_ID) String strRuleChainId) throws ThingsboardException {
         checkParameter(RULE_CHAIN_ID, strRuleChainId);
-        try {
-            RuleChainId ruleChainId = new RuleChainId(toUUID(strRuleChainId));
-            checkRuleChain(ruleChainId, Operation.READ);
-            return tbRuleChainService.getRuleChainOutputLabels(getTenantId(), ruleChainId);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        RuleChainId ruleChainId = new RuleChainId(toUUID(strRuleChainId));
+        checkRuleChain(ruleChainId, Operation.READ);
+        return tbRuleChainService.getRuleChainOutputLabels(getTenantId(), ruleChainId);
     }
 
     @ApiOperation(value = "Get output labels usage (getRuleChainOutputLabelsUsage)",
@@ -203,13 +196,9 @@ public class RuleChainController extends BaseController {
             @ApiParam(value = RULE_CHAIN_ID_PARAM_DESCRIPTION)
             @PathVariable(RULE_CHAIN_ID) String strRuleChainId) throws ThingsboardException {
         checkParameter(RULE_CHAIN_ID, strRuleChainId);
-        try {
-            RuleChainId ruleChainId = new RuleChainId(toUUID(strRuleChainId));
-            checkRuleChain(ruleChainId, Operation.READ);
-            return tbRuleChainService.getOutputLabelUsage(getCurrentUser().getTenantId(), ruleChainId);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        RuleChainId ruleChainId = new RuleChainId(toUUID(strRuleChainId));
+        checkRuleChain(ruleChainId, Operation.READ);
+        return tbRuleChainService.getOutputLabelUsage(getCurrentUser().getTenantId(), ruleChainId);
     }
 
     @ApiOperation(value = "Get Rule Chain (getRuleChainById)",
@@ -221,13 +210,9 @@ public class RuleChainController extends BaseController {
             @ApiParam(value = RULE_CHAIN_ID_PARAM_DESCRIPTION)
             @PathVariable(RULE_CHAIN_ID) String strRuleChainId) throws ThingsboardException {
         checkParameter(RULE_CHAIN_ID, strRuleChainId);
-        try {
-            RuleChainId ruleChainId = new RuleChainId(toUUID(strRuleChainId));
-            checkRuleChain(ruleChainId, Operation.READ);
-            return ruleChainService.loadRuleChainMetaData(getTenantId(), ruleChainId);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        RuleChainId ruleChainId = new RuleChainId(toUUID(strRuleChainId));
+        checkRuleChain(ruleChainId, Operation.READ);
+        return ruleChainService.loadRuleChainMetaData(getTenantId(), ruleChainId);
     }
 
     @ApiOperation(value = "Create Or Update Rule Chain (saveRuleChain)",
@@ -319,17 +304,13 @@ public class RuleChainController extends BaseController {
             @RequestParam(required = false) String sortProperty,
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            RuleChainType type = RuleChainType.CORE;
-            if (typeStr != null && typeStr.trim().length() > 0) {
-                type = RuleChainType.valueOf(typeStr);
-            }
-            return checkNotNull(ruleChainService.findTenantRuleChainsByType(tenantId, type, pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        RuleChainType type = RuleChainType.CORE;
+        if (typeStr != null && typeStr.trim().length() > 0) {
+            type = RuleChainType.valueOf(typeStr);
         }
+        return checkNotNull(ruleChainService.findTenantRuleChainsByType(tenantId, type, pageLink));
     }
 
     @ApiOperation(value = "Delete rule chain (deleteRuleChain)",
@@ -357,25 +338,21 @@ public class RuleChainController extends BaseController {
             @ApiParam(value = RULE_NODE_ID_PARAM_DESCRIPTION)
             @PathVariable(RULE_NODE_ID) String strRuleNodeId) throws ThingsboardException {
         checkParameter(RULE_NODE_ID, strRuleNodeId);
-        try {
-            RuleNodeId ruleNodeId = new RuleNodeId(toUUID(strRuleNodeId));
-            checkRuleNode(ruleNodeId, Operation.READ);
-            TenantId tenantId = getCurrentUser().getTenantId();
-            List<EventInfo> events = eventService.findLatestEvents(tenantId, ruleNodeId, EventType.DEBUG_RULE_NODE, 2);
-            JsonNode result = null;
-            if (events != null) {
-                for (EventInfo event : events) {
-                    JsonNode body = event.getBody();
-                    if (body.has("type") && body.get("type").asText().equals("IN")) {
-                        result = body;
-                        break;
-                    }
+        RuleNodeId ruleNodeId = new RuleNodeId(toUUID(strRuleNodeId));
+        checkRuleNode(ruleNodeId, Operation.READ);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        List<EventInfo> events = eventService.findLatestEvents(tenantId, ruleNodeId, EventType.DEBUG_RULE_NODE, 2);
+        JsonNode result = null;
+        if (events != null) {
+            for (EventInfo event : events) {
+                JsonNode body = event.getBody();
+                if (body.has("type") && body.get("type").asText().equals("IN")) {
+                    result = body;
+                    break;
                 }
             }
-            return result;
-        } catch (Exception e) {
-            throw handleException(e);
         }
+        return result;
     }
 
     @ApiOperation(value = "Is TBEL script executor enabled",
@@ -396,74 +373,70 @@ public class RuleChainController extends BaseController {
             @ApiParam(value = "Script language: JS or TBEL")
             @RequestParam(required = false) ScriptLanguage scriptLang,
             @ApiParam(value = "Test JS request. See API call description above.")
-            @RequestBody JsonNode inputParams) throws ThingsboardException {
+            @RequestBody JsonNode inputParams) throws ThingsboardException, JsonProcessingException {
+        String script = inputParams.get("script").asText();
+        String scriptType = inputParams.get("scriptType").asText();
+        JsonNode argNamesJson = inputParams.get("argNames");
+        String[] argNames = objectMapper.treeToValue(argNamesJson, String[].class);
+
+        String data = inputParams.get("msg").asText();
+        JsonNode metadataJson = inputParams.get("metadata");
+        Map<String, String> metadata = objectMapper.convertValue(metadataJson, new TypeReference<Map<String, String>>() {
+        });
+        String msgType = inputParams.get("msgType").asText();
+        String output = "";
+        String errorText = "";
+        ScriptEngine engine = null;
         try {
-            String script = inputParams.get("script").asText();
-            String scriptType = inputParams.get("scriptType").asText();
-            JsonNode argNamesJson = inputParams.get("argNames");
-            String[] argNames = objectMapper.treeToValue(argNamesJson, String[].class);
-
-            String data = inputParams.get("msg").asText();
-            JsonNode metadataJson = inputParams.get("metadata");
-            Map<String, String> metadata = objectMapper.convertValue(metadataJson, new TypeReference<Map<String, String>>() {
-            });
-            String msgType = inputParams.get("msgType").asText();
-            String output = "";
-            String errorText = "";
-            ScriptEngine engine = null;
-            try {
-                if (scriptLang == null) {
-                    scriptLang = ScriptLanguage.JS;
-                }
-                if (ScriptLanguage.JS.equals(scriptLang)) {
-                    engine = new RuleNodeJsScriptEngine(getTenantId(), jsInvokeService, script, argNames);
-                } else {
-                    if (tbelInvokeService == null) {
-                        throw new IllegalArgumentException("TBEL script engine is disabled!");
-                    }
-                    engine = new RuleNodeTbelScriptEngine(getTenantId(), tbelInvokeService, script, argNames);
-                }
-                TbMsg inMsg = TbMsg.newMsg(msgType, null, new TbMsgMetaData(metadata), TbMsgDataType.JSON, data);
-                switch (scriptType) {
-                    case "update":
-                        output = msgToOutput(engine.executeUpdateAsync(inMsg).get(TIMEOUT, TimeUnit.SECONDS));
-                        break;
-                    case "generate":
-                        output = msgToOutput(engine.executeGenerateAsync(inMsg).get(TIMEOUT, TimeUnit.SECONDS));
-                        break;
-                    case "filter":
-                        boolean result = engine.executeFilterAsync(inMsg).get(TIMEOUT, TimeUnit.SECONDS);
-                        output = Boolean.toString(result);
-                        break;
-                    case "switch":
-                        Set<String> states = engine.executeSwitchAsync(inMsg).get(TIMEOUT, TimeUnit.SECONDS);
-                        output = objectMapper.writeValueAsString(states);
-                        break;
-                    case "json":
-                        JsonNode json = engine.executeJsonAsync(inMsg).get(TIMEOUT, TimeUnit.SECONDS);
-                        output = objectMapper.writeValueAsString(json);
-                        break;
-                    case "string":
-                        output = engine.executeToStringAsync(inMsg).get(TIMEOUT, TimeUnit.SECONDS);
-                        break;
-                    default:
-                        throw new IllegalArgumentException("Unsupported script type: " + scriptType);
-                }
-            } catch (Exception e) {
-                log.error("Error evaluating JS function", e);
-                errorText = e.getMessage();
-            } finally {
-                if (engine != null) {
-                    engine.destroy();
+            if (scriptLang == null) {
+                scriptLang = ScriptLanguage.JS;
+            }
+            if (ScriptLanguage.JS.equals(scriptLang)) {
+                engine = new RuleNodeJsScriptEngine(getTenantId(), jsInvokeService, script, argNames);
+            } else {
+                if (tbelInvokeService == null) {
+                    throw new IllegalArgumentException("TBEL script engine is disabled!");
                 }
+                engine = new RuleNodeTbelScriptEngine(getTenantId(), tbelInvokeService, script, argNames);
+            }
+            TbMsg inMsg = TbMsg.newMsg(msgType, null, new TbMsgMetaData(metadata), TbMsgDataType.JSON, data);
+            switch (scriptType) {
+                case "update":
+                    output = msgToOutput(engine.executeUpdateAsync(inMsg).get(TIMEOUT, TimeUnit.SECONDS));
+                    break;
+                case "generate":
+                    output = msgToOutput(engine.executeGenerateAsync(inMsg).get(TIMEOUT, TimeUnit.SECONDS));
+                    break;
+                case "filter":
+                    boolean result = engine.executeFilterAsync(inMsg).get(TIMEOUT, TimeUnit.SECONDS);
+                    output = Boolean.toString(result);
+                    break;
+                case "switch":
+                    Set<String> states = engine.executeSwitchAsync(inMsg).get(TIMEOUT, TimeUnit.SECONDS);
+                    output = objectMapper.writeValueAsString(states);
+                    break;
+                case "json":
+                    JsonNode json = engine.executeJsonAsync(inMsg).get(TIMEOUT, TimeUnit.SECONDS);
+                    output = objectMapper.writeValueAsString(json);
+                    break;
+                case "string":
+                    output = engine.executeToStringAsync(inMsg).get(TIMEOUT, TimeUnit.SECONDS);
+                    break;
+                default:
+                    throw new IllegalArgumentException("Unsupported script type: " + scriptType);
             }
-            ObjectNode result = objectMapper.createObjectNode();
-            result.put("output", output);
-            result.put("error", errorText);
-            return result;
         } catch (Exception e) {
-            throw handleException(e);
+            log.error("Error evaluating JS function", e);
+            errorText = e.getMessage();
+        } finally {
+            if (engine != null) {
+                engine.destroy();
+            }
         }
+        ObjectNode result = objectMapper.createObjectNode();
+        result.put("output", output);
+        result.put("error", errorText);
+        return result;
     }
 
     @ApiOperation(value = "Export Rule Chains", notes = "Exports all tenant rule chains as one JSON." + TENANT_AUTHORITY_PARAGRAPH)
@@ -473,13 +446,9 @@ public class RuleChainController extends BaseController {
     public RuleChainData exportRuleChains(
             @ApiParam(value = "A limit of rule chains to export.", required = true)
             @RequestParam("limit") int limit) throws ThingsboardException {
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            PageLink pageLink = new PageLink(limit);
-            return checkNotNull(ruleChainService.exportTenantRuleChains(tenantId, pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        TenantId tenantId = getCurrentUser().getTenantId();
+        PageLink pageLink = new PageLink(limit);
+        return checkNotNull(ruleChainService.exportTenantRuleChains(tenantId, pageLink));
     }
 
     @ApiOperation(value = "Import Rule Chains", notes = "Imports all tenant rule chains as one JSON." + TENANT_AUTHORITY_PARAGRAPH)
@@ -491,19 +460,15 @@ public class RuleChainController extends BaseController {
             @RequestBody RuleChainData ruleChainData,
             @ApiParam(value = "Enables overwrite for existing rule chains with the same name.")
             @RequestParam(required = false, defaultValue = "false") boolean overwrite) throws ThingsboardException {
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            List<RuleChainImportResult> importResults = ruleChainService.importTenantRuleChains(tenantId, ruleChainData, overwrite);
-            for (RuleChainImportResult importResult : importResults) {
-                if (importResult.getError() == null) {
-                    tbClusterService.broadcastEntityStateChangeEvent(importResult.getTenantId(), importResult.getRuleChainId(),
-                            importResult.isUpdated() ? ComponentLifecycleEvent.UPDATED : ComponentLifecycleEvent.CREATED);
-                }
+        TenantId tenantId = getCurrentUser().getTenantId();
+        List<RuleChainImportResult> importResults = ruleChainService.importTenantRuleChains(tenantId, ruleChainData, overwrite);
+        for (RuleChainImportResult importResult : importResults) {
+            if (importResult.getError() == null) {
+                tbClusterService.broadcastEntityStateChangeEvent(importResult.getTenantId(), importResult.getRuleChainId(),
+                        importResult.isUpdated() ? ComponentLifecycleEvent.UPDATED : ComponentLifecycleEvent.CREATED);
             }
-            return importResults;
-        } catch (Exception e) {
-            throw handleException(e);
         }
+        return importResults;
     }
 
     private String msgToOutput(TbMsg msg) throws Exception {
@@ -601,15 +566,11 @@ public class RuleChainController extends BaseController {
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
         checkParameter(EDGE_ID, strEdgeId);
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
-            checkEdgeId(edgeId, Operation.READ);
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            return checkNotNull(ruleChainService.findRuleChainsByTenantIdAndEdgeId(tenantId, edgeId, pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        TenantId tenantId = getCurrentUser().getTenantId();
+        EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
+        checkEdgeId(edgeId, Operation.READ);
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        return checkNotNull(ruleChainService.findRuleChainsByTenantIdAndEdgeId(tenantId, edgeId, pageLink));
     }
 
     @ApiOperation(value = "Set Edge Template Root Rule Chain (setEdgeTemplateRootRuleChain)",
@@ -661,17 +622,13 @@ public class RuleChainController extends BaseController {
     @RequestMapping(value = "/ruleChain/autoAssignToEdgeRuleChains", method = RequestMethod.GET)
     @ResponseBody
     public List<RuleChain> getAutoAssignToEdgeRuleChains() throws ThingsboardException {
-        try {
-            TenantId tenantId = getCurrentUser().getTenantId();
-            List<RuleChain> result = new ArrayList<>();
-            PageDataIterableByTenant<RuleChain> autoAssignRuleChainsIterator =
-                    new PageDataIterableByTenant<>(ruleChainService::findAutoAssignToEdgeRuleChainsByTenantId, tenantId, DEFAULT_PAGE_SIZE);
-            for (RuleChain ruleChain : autoAssignRuleChainsIterator) {
-                result.add(ruleChain);
-            }
-            return checkNotNull(result);
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        List<RuleChain> result = new ArrayList<>();
+        PageDataIterableByTenant<RuleChain> autoAssignRuleChainsIterator =
+                new PageDataIterableByTenant<>(ruleChainService::findAutoAssignToEdgeRuleChainsByTenantId, tenantId, DEFAULT_PAGE_SIZE);
+        for (RuleChain ruleChain : autoAssignRuleChainsIterator) {
+            result.add(ruleChain);
         }
+        return checkNotNull(result);
     }
 }
diff --git a/application/src/main/java/org/thingsboard/server/controller/TbResourceController.java b/application/src/main/java/org/thingsboard/server/controller/TbResourceController.java
index 2485e96bd2..d94dc31fa1 100644
--- a/application/src/main/java/org/thingsboard/server/controller/TbResourceController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/TbResourceController.java
@@ -82,20 +82,16 @@ public class TbResourceController extends BaseController {
     public ResponseEntity<org.springframework.core.io.Resource> downloadResource(@ApiParam(value = RESOURCE_ID_PARAM_DESCRIPTION)
                                                                                  @PathVariable(RESOURCE_ID) String strResourceId) throws ThingsboardException {
         checkParameter(RESOURCE_ID, strResourceId);
-        try {
-            TbResourceId resourceId = new TbResourceId(toUUID(strResourceId));
-            TbResource tbResource = checkResourceId(resourceId, Operation.READ);
+        TbResourceId resourceId = new TbResourceId(toUUID(strResourceId));
+        TbResource tbResource = checkResourceId(resourceId, Operation.READ);
 
-            ByteArrayResource resource = new ByteArrayResource(Base64.getDecoder().decode(tbResource.getData().getBytes()));
-            return ResponseEntity.ok()
-                    .header(HttpHeaders.CONTENT_DISPOSITION, "attachment;filename=" + tbResource.getFileName())
-                    .header("x-filename", tbResource.getFileName())
-                    .contentLength(resource.contentLength())
-                    .contentType(MediaType.APPLICATION_OCTET_STREAM)
-                    .body(resource);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        ByteArrayResource resource = new ByteArrayResource(Base64.getDecoder().decode(tbResource.getData().getBytes()));
+        return ResponseEntity.ok()
+                .header(HttpHeaders.CONTENT_DISPOSITION, "attachment;filename=" + tbResource.getFileName())
+                .header("x-filename", tbResource.getFileName())
+                .contentLength(resource.contentLength())
+                .contentType(MediaType.APPLICATION_OCTET_STREAM)
+                .body(resource);
     }
 
     @ApiOperation(value = "Get Resource Info (getResourceInfoById)",
@@ -108,12 +104,8 @@ public class TbResourceController extends BaseController {
     public TbResourceInfo getResourceInfoById(@ApiParam(value = RESOURCE_ID_PARAM_DESCRIPTION)
                                               @PathVariable(RESOURCE_ID) String strResourceId) throws ThingsboardException {
         checkParameter(RESOURCE_ID, strResourceId);
-        try {
-            TbResourceId resourceId = new TbResourceId(toUUID(strResourceId));
-            return checkResourceInfoId(resourceId, Operation.READ);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        TbResourceId resourceId = new TbResourceId(toUUID(strResourceId));
+        return checkResourceInfoId(resourceId, Operation.READ);
     }
 
     @ApiOperation(value = "Get Resource (getResourceById)",
@@ -126,12 +118,8 @@ public class TbResourceController extends BaseController {
     public TbResource getResourceById(@ApiParam(value = RESOURCE_ID_PARAM_DESCRIPTION)
                                       @PathVariable(RESOURCE_ID) String strResourceId) throws ThingsboardException {
         checkParameter(RESOURCE_ID, strResourceId);
-        try {
-            TbResourceId resourceId = new TbResourceId(toUUID(strResourceId));
-            return checkResourceId(resourceId, Operation.READ);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        TbResourceId resourceId = new TbResourceId(toUUID(strResourceId));
+        return checkResourceId(resourceId, Operation.READ);
     }
 
     @ApiOperation(value = "Create Or Update Resource (saveResource)",
@@ -171,15 +159,11 @@ public class TbResourceController extends BaseController {
                                                  @RequestParam(required = false) String sortProperty,
                                                  @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
                                                  @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            if (Authority.SYS_ADMIN.equals(getCurrentUser().getAuthority())) {
-                return checkNotNull(resourceService.findTenantResourcesByTenantId(getTenantId(), pageLink));
-            } else {
-                return checkNotNull(resourceService.findAllTenantResourcesByTenantId(getTenantId(), pageLink));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        if (Authority.SYS_ADMIN.equals(getCurrentUser().getAuthority())) {
+            return checkNotNull(resourceService.findTenantResourcesByTenantId(getTenantId(), pageLink));
+        } else {
+            return checkNotNull(resourceService.findAllTenantResourcesByTenantId(getTenantId(), pageLink));
         }
     }
 
@@ -200,12 +184,8 @@ public class TbResourceController extends BaseController {
                                                      @RequestParam(required = false) String sortProperty,
                                                      @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
                                                      @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            PageLink pageLink = new PageLink(pageSize, page, textSearch);
-            return checkNotNull(resourceService.findLwM2mObjectPage(getTenantId(), sortProperty, sortOrder, pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        PageLink pageLink = new PageLink(pageSize, page, textSearch);
+        return checkNotNull(resourceService.findLwM2mObjectPage(getTenantId(), sortProperty, sortOrder, pageLink));
     }
 
     @ApiOperation(value = "Get LwM2M Objects (getLwm2mListObjects)",
@@ -221,11 +201,7 @@ public class TbResourceController extends BaseController {
                                                  @RequestParam String sortProperty,
                                                  @ApiParam(value = "LwM2M Object ids.", required = true)
                                                  @RequestParam(required = false) String[] objectIds) throws ThingsboardException {
-        try {
-            return checkNotNull(resourceService.findLwM2mObject(getTenantId(), sortOrder, sortProperty, objectIds));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return checkNotNull(resourceService.findLwM2mObject(getTenantId(), sortOrder, sortProperty, objectIds));
     }
 
     @ApiOperation(value = "Delete Resource (deleteResource)",
diff --git a/application/src/main/java/org/thingsboard/server/controller/TelemetryController.java b/application/src/main/java/org/thingsboard/server/controller/TelemetryController.java
index ac3277a5a8..ce6537fd3f 100644
--- a/application/src/main/java/org/thingsboard/server/controller/TelemetryController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/TelemetryController.java
@@ -184,11 +184,7 @@ public class TelemetryController extends BaseController {
     public DeferredResult<ResponseEntity> getAttributeKeys(
             @ApiParam(value = ENTITY_TYPE_PARAM_DESCRIPTION, required = true, defaultValue = "DEVICE") @PathVariable("entityType") String entityType,
             @ApiParam(value = ENTITY_ID_PARAM_DESCRIPTION, required = true) @PathVariable("entityId") String entityIdStr) throws ThingsboardException {
-        try {
-            return accessValidator.validateEntityAndCallback(getCurrentUser(), Operation.READ_ATTRIBUTES, entityType, entityIdStr, this::getAttributeKeysCallback);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return accessValidator.validateEntityAndCallback(getCurrentUser(), Operation.READ_ATTRIBUTES, entityType, entityIdStr, this::getAttributeKeysCallback);
     }
 
     @ApiOperation(value = "Get all attribute keys by scope (getAttributeKeysByScope)",
@@ -205,12 +201,8 @@ public class TelemetryController extends BaseController {
             @ApiParam(value = ENTITY_TYPE_PARAM_DESCRIPTION, required = true, defaultValue = "DEVICE") @PathVariable("entityType") String entityType,
             @ApiParam(value = ENTITY_ID_PARAM_DESCRIPTION, required = true) @PathVariable("entityId") String entityIdStr,
             @ApiParam(value = ATTRIBUTES_SCOPE_DESCRIPTION, required = true, allowableValues = ATTRIBUTES_SCOPE_ALLOWED_VALUES) @PathVariable("scope") String scope) throws ThingsboardException {
-        try {
-            return accessValidator.validateEntityAndCallback(getCurrentUser(), Operation.READ_ATTRIBUTES, entityType, entityIdStr,
+        return accessValidator.validateEntityAndCallback(getCurrentUser(), Operation.READ_ATTRIBUTES, entityType, entityIdStr,
                     (result, tenantId, entityId) -> getAttributeKeysCallback(result, tenantId, entityId, scope));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
     }
 
     @ApiOperation(value = "Get attributes (getAttributes)",
@@ -228,13 +220,9 @@ public class TelemetryController extends BaseController {
             @ApiParam(value = ENTITY_TYPE_PARAM_DESCRIPTION, required = true, defaultValue = "DEVICE") @PathVariable("entityType") String entityType,
             @ApiParam(value = ENTITY_ID_PARAM_DESCRIPTION, required = true) @PathVariable("entityId") String entityIdStr,
             @ApiParam(value = ATTRIBUTES_KEYS_DESCRIPTION) @RequestParam(name = "keys", required = false) String keysStr) throws ThingsboardException {
-        try {
             SecurityUser user = getCurrentUser();
-            return accessValidator.validateEntityAndCallback(getCurrentUser(), Operation.READ_ATTRIBUTES, entityType, entityIdStr,
+        return accessValidator.validateEntityAndCallback(getCurrentUser(), Operation.READ_ATTRIBUTES, entityType, entityIdStr,
                     (result, tenantId, entityId) -> getAttributeValuesCallback(result, user, entityId, null, keysStr));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
     }
 
 
@@ -256,13 +244,9 @@ public class TelemetryController extends BaseController {
             @ApiParam(value = ENTITY_ID_PARAM_DESCRIPTION, required = true) @PathVariable("entityId") String entityIdStr,
             @ApiParam(value = ATTRIBUTES_SCOPE_DESCRIPTION, allowableValues = ATTRIBUTES_SCOPE_ALLOWED_VALUES, required = true) @PathVariable("scope") String scope,
             @ApiParam(value = ATTRIBUTES_KEYS_DESCRIPTION) @RequestParam(name = "keys", required = false) String keysStr) throws ThingsboardException {
-        try {
-            SecurityUser user = getCurrentUser();
-            return accessValidator.validateEntityAndCallback(getCurrentUser(), Operation.READ_ATTRIBUTES, entityType, entityIdStr,
+        SecurityUser user = getCurrentUser();
+        return accessValidator.validateEntityAndCallback(getCurrentUser(), Operation.READ_ATTRIBUTES, entityType, entityIdStr,
                     (result, tenantId, entityId) -> getAttributeValuesCallback(result, user, entityId, scope, keysStr));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
     }
 
     @ApiOperation(value = "Get time-series keys (getTimeseriesKeys)",
@@ -275,12 +259,8 @@ public class TelemetryController extends BaseController {
     public DeferredResult<ResponseEntity> getTimeseriesKeys(
             @ApiParam(value = ENTITY_TYPE_PARAM_DESCRIPTION, required = true, defaultValue = "DEVICE") @PathVariable("entityType") String entityType,
             @ApiParam(value = ENTITY_ID_PARAM_DESCRIPTION, required = true) @PathVariable("entityId") String entityIdStr) throws ThingsboardException {
-        try {
-            return accessValidator.validateEntityAndCallback(getCurrentUser(), Operation.READ_TELEMETRY, entityType, entityIdStr,
+        return accessValidator.validateEntityAndCallback(getCurrentUser(), Operation.READ_TELEMETRY, entityType, entityIdStr,
                     (result, tenantId, entityId) -> Futures.addCallback(tsService.findAllLatest(tenantId, entityId), getTsKeysToResponseCallback(result), MoreExecutors.directExecutor()));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
     }
 
     @ApiOperation(value = "Get latest time-series value (getLatestTimeseries)",
@@ -305,13 +285,9 @@ public class TelemetryController extends BaseController {
             @ApiParam(value = TELEMETRY_KEYS_DESCRIPTION) @RequestParam(name = "keys", required = false) String keysStr,
             @ApiParam(value = STRICT_DATA_TYPES_DESCRIPTION)
             @RequestParam(name = "useStrictDataTypes", required = false, defaultValue = "false") Boolean useStrictDataTypes) throws ThingsboardException {
-        try {
-            SecurityUser user = getCurrentUser();
-            return accessValidator.validateEntityAndCallback(getCurrentUser(), Operation.READ_TELEMETRY, entityType, entityIdStr,
-                    (result, tenantId, entityId) -> getLatestTimeseriesValuesCallback(result, user, entityId, keysStr, useStrictDataTypes));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        SecurityUser user = getCurrentUser();
+        return accessValidator.validateEntityAndCallback(getCurrentUser(), Operation.READ_TELEMETRY, entityType, entityIdStr,
+                (result, tenantId, entityId) -> getLatestTimeseriesValuesCallback(result, user, entityId, keysStr, useStrictDataTypes));
     }
 
     @ApiOperation(value = "Get time-series data (getTimeseries)",
@@ -348,19 +324,15 @@ public class TelemetryController extends BaseController {
             @RequestParam(name = "orderBy", defaultValue = "DESC") String orderBy,
             @ApiParam(value = STRICT_DATA_TYPES_DESCRIPTION)
             @RequestParam(name = "useStrictDataTypes", required = false, defaultValue = "false") Boolean useStrictDataTypes) throws ThingsboardException {
-        try {
-            return accessValidator.validateEntityAndCallback(getCurrentUser(), Operation.READ_TELEMETRY, entityType, entityIdStr,
-                    (result, tenantId, entityId) -> {
-                        // If interval is 0, convert this to a NONE aggregation, which is probably what the user really wanted
-                        Aggregation agg = interval == 0L ? Aggregation.valueOf(Aggregation.NONE.name()) : Aggregation.valueOf(aggStr);
-                        List<ReadTsKvQuery> queries = toKeysList(keys).stream().map(key -> new BaseReadTsKvQuery(key, startTs, endTs, interval, limit, agg, orderBy))
-                                .collect(Collectors.toList());
-
-                        Futures.addCallback(tsService.findAll(tenantId, entityId, queries), getTsKvListCallback(result, useStrictDataTypes), MoreExecutors.directExecutor());
-                    });
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return accessValidator.validateEntityAndCallback(getCurrentUser(), Operation.READ_TELEMETRY, entityType, entityIdStr,
+                (result, tenantId, entityId) -> {
+                    // If interval is 0, convert this to a NONE aggregation, which is probably what the user really wanted
+                    Aggregation agg = interval == 0L ? Aggregation.valueOf(Aggregation.NONE.name()) : Aggregation.valueOf(aggStr);
+                    List<ReadTsKvQuery> queries = toKeysList(keys).stream().map(key -> new BaseReadTsKvQuery(key, startTs, endTs, interval, limit, agg, orderBy))
+                            .collect(Collectors.toList());
+
+                    Futures.addCallback(tsService.findAll(tenantId, entityId, queries), getTsKvListCallback(result, useStrictDataTypes), MoreExecutors.directExecutor());
+                });
     }
 
     @ApiOperation(value = "Save device attributes (saveDeviceAttributes)",
@@ -384,12 +356,8 @@ public class TelemetryController extends BaseController {
             @ApiParam(value = DEVICE_ID_PARAM_DESCRIPTION, required = true) @PathVariable("deviceId") String deviceIdStr,
             @ApiParam(value = ATTRIBUTES_SCOPE_DESCRIPTION, allowableValues = ATTRIBUTES_SAVE_SCOPE_ALLOWED_VALUES, required = true) @PathVariable("scope") String scope,
             @ApiParam(value = ATTRIBUTES_JSON_REQUEST_DESCRIPTION, required = true) @RequestBody JsonNode request) throws ThingsboardException {
-        try {
-            EntityId entityId = EntityIdFactory.getByTypeAndUuid(EntityType.DEVICE, deviceIdStr);
-            return saveAttributes(getTenantId(), entityId, scope, request);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        EntityId entityId = EntityIdFactory.getByTypeAndUuid(EntityType.DEVICE, deviceIdStr);
+        return saveAttributes(getTenantId(), entityId, scope, request);
     }
 
     @ApiOperation(value = "Save entity attributes (saveEntityAttributesV1)",
@@ -412,12 +380,8 @@ public class TelemetryController extends BaseController {
             @ApiParam(value = ENTITY_ID_PARAM_DESCRIPTION, required = true) @PathVariable("entityId") String entityIdStr,
             @ApiParam(value = ATTRIBUTES_SCOPE_DESCRIPTION, allowableValues = ATTRIBUTES_SAVE_SCOPE_ALLOWED_VALUES) @PathVariable("scope") String scope,
             @ApiParam(value = ATTRIBUTES_JSON_REQUEST_DESCRIPTION, required = true) @RequestBody JsonNode request) throws ThingsboardException {
-        try {
-            EntityId entityId = EntityIdFactory.getByTypeAndId(entityType, entityIdStr);
-            return saveAttributes(getTenantId(), entityId, scope, request);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        EntityId entityId = EntityIdFactory.getByTypeAndId(entityType, entityIdStr);
+        return saveAttributes(getTenantId(), entityId, scope, request);
     }
 
     @ApiOperation(value = "Save entity attributes (saveEntityAttributesV2)",
@@ -440,12 +404,8 @@ public class TelemetryController extends BaseController {
             @ApiParam(value = ENTITY_ID_PARAM_DESCRIPTION, required = true) @PathVariable("entityId") String entityIdStr,
             @ApiParam(value = ATTRIBUTES_SCOPE_DESCRIPTION, allowableValues = ATTRIBUTES_SAVE_SCOPE_ALLOWED_VALUES, required = true) @PathVariable("scope") String scope,
             @ApiParam(value = ATTRIBUTES_JSON_REQUEST_DESCRIPTION, required = true) @RequestBody JsonNode request) throws ThingsboardException {
-        try {
-            EntityId entityId = EntityIdFactory.getByTypeAndId(entityType, entityIdStr);
-            return saveAttributes(getTenantId(), entityId, scope, request);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        EntityId entityId = EntityIdFactory.getByTypeAndId(entityType, entityIdStr);
+        return saveAttributes(getTenantId(), entityId, scope, request);
     }
 
 
@@ -469,12 +429,8 @@ public class TelemetryController extends BaseController {
             @ApiParam(value = ENTITY_ID_PARAM_DESCRIPTION, required = true) @PathVariable("entityId") String entityIdStr,
             @ApiParam(value = TELEMETRY_SCOPE_DESCRIPTION, required = true, allowableValues = "ANY") @PathVariable("scope") String scope,
             @ApiParam(value = TELEMETRY_JSON_REQUEST_DESCRIPTION, required = true) @RequestBody String requestBody) throws ThingsboardException {
-        try {
-            EntityId entityId = EntityIdFactory.getByTypeAndId(entityType, entityIdStr);
-            return saveTelemetry(getTenantId(), entityId, requestBody, 0L);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        EntityId entityId = EntityIdFactory.getByTypeAndId(entityType, entityIdStr);
+        return saveTelemetry(getTenantId(), entityId, requestBody, 0L);
     }
 
     @ApiOperation(value = "Save or update time-series data with TTL (saveEntityTelemetryWithTTL)",
@@ -499,12 +455,8 @@ public class TelemetryController extends BaseController {
             @ApiParam(value = TELEMETRY_SCOPE_DESCRIPTION, required = true, allowableValues = "ANY") @PathVariable("scope") String scope,
             @ApiParam(value = "A long value representing TTL (Time to Live) parameter.", required = true) @PathVariable("ttl") Long ttl,
             @ApiParam(value = TELEMETRY_JSON_REQUEST_DESCRIPTION, required = true) @RequestBody String requestBody) throws ThingsboardException {
-        try {
-            EntityId entityId = EntityIdFactory.getByTypeAndId(entityType, entityIdStr);
-            return saveTelemetry(getTenantId(), entityId, requestBody, ttl);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        EntityId entityId = EntityIdFactory.getByTypeAndId(entityType, entityIdStr);
+        return saveTelemetry(getTenantId(), entityId, requestBody, ttl);
     }
 
     @ApiOperation(value = "Delete entity time-series data (deleteEntityTimeseries)",
@@ -537,12 +489,8 @@ public class TelemetryController extends BaseController {
             @RequestParam(name = "endTs", required = false) Long endTs,
             @ApiParam(value = "If the parameter is set to true, the latest telemetry will be rewritten in case that current latest value was removed, otherwise, in case that parameter is set to false the new latest value will not set.")
             @RequestParam(name = "rewriteLatestIfDeleted", defaultValue = "false") boolean rewriteLatestIfDeleted) throws ThingsboardException {
-        try {
-            EntityId entityId = EntityIdFactory.getByTypeAndId(entityType, entityIdStr);
-            return deleteTimeseries(entityId, keysStr, deleteAllDataForKeys, startTs, endTs, rewriteLatestIfDeleted);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        EntityId entityId = EntityIdFactory.getByTypeAndId(entityType, entityIdStr);
+        return deleteTimeseries(entityId, keysStr, deleteAllDataForKeys, startTs, endTs, rewriteLatestIfDeleted);
     }
 
     private DeferredResult<ResponseEntity> deleteTimeseries(EntityId entityIdStr, String keysStr, boolean deleteAllDataForKeys,
@@ -607,12 +555,8 @@ public class TelemetryController extends BaseController {
             @ApiParam(value = DEVICE_ID_PARAM_DESCRIPTION, required = true) @PathVariable(DEVICE_ID) String deviceIdStr,
             @ApiParam(value = ATTRIBUTES_SCOPE_DESCRIPTION, allowableValues = ATTRIBUTES_SCOPE_ALLOWED_VALUES, required = true) @PathVariable("scope") String scope,
             @ApiParam(value = ATTRIBUTES_KEYS_DESCRIPTION, required = true) @RequestParam(name = "keys") String keysStr) throws ThingsboardException {
-        try {
-            EntityId entityId = EntityIdFactory.getByTypeAndUuid(EntityType.DEVICE, deviceIdStr);
-            return deleteAttributes(entityId, scope, keysStr);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        EntityId entityId = EntityIdFactory.getByTypeAndUuid(EntityType.DEVICE, deviceIdStr);
+        return deleteAttributes(entityId, scope, keysStr);
     }
 
     @ApiOperation(value = "Delete entity attributes (deleteEntityAttributes)",
@@ -635,12 +579,8 @@ public class TelemetryController extends BaseController {
             @ApiParam(value = ENTITY_ID_PARAM_DESCRIPTION, required = true) @PathVariable("entityId") String entityIdStr,
             @ApiParam(value = ATTRIBUTES_SCOPE_DESCRIPTION, required = true, allowableValues = ATTRIBUTES_SCOPE_ALLOWED_VALUES) @PathVariable("scope") String scope,
             @ApiParam(value = ATTRIBUTES_KEYS_DESCRIPTION, required = true) @RequestParam(name = "keys") String keysStr) throws ThingsboardException {
-        try {
-            EntityId entityId = EntityIdFactory.getByTypeAndId(entityType, entityIdStr);
-            return deleteAttributes(entityId, scope, keysStr);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        EntityId entityId = EntityIdFactory.getByTypeAndId(entityType, entityIdStr);
+        return deleteAttributes(entityId, scope, keysStr);
     }
 
     private DeferredResult<ResponseEntity> deleteAttributes(EntityId entityIdSrc, String scope, String keysStr) throws ThingsboardException {
diff --git a/application/src/main/java/org/thingsboard/server/controller/TenantController.java b/application/src/main/java/org/thingsboard/server/controller/TenantController.java
index d12a692127..6574969e15 100644
--- a/application/src/main/java/org/thingsboard/server/controller/TenantController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/TenantController.java
@@ -79,16 +79,12 @@ public class TenantController extends BaseController {
             @ApiParam(value = TENANT_ID_PARAM_DESCRIPTION)
             @PathVariable(TENANT_ID) String strTenantId) throws ThingsboardException {
         checkParameter(TENANT_ID, strTenantId);
-        try {
-            TenantId tenantId = TenantId.fromUUID(toUUID(strTenantId));
-            Tenant tenant = checkTenantId(tenantId, Operation.READ);
-            if (!tenant.getAdditionalInfo().isNull()) {
-                processDashboardIdFromAdditionalInfo((ObjectNode) tenant.getAdditionalInfo(), HOME_DASHBOARD);
-            }
-            return tenant;
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId = TenantId.fromUUID(toUUID(strTenantId));
+        Tenant tenant = checkTenantId(tenantId, Operation.READ);
+        if (!tenant.getAdditionalInfo().isNull()) {
+            processDashboardIdFromAdditionalInfo((ObjectNode) tenant.getAdditionalInfo(), HOME_DASHBOARD);
         }
+        return tenant;
     }
 
     @ApiOperation(value = "Get Tenant Info (getTenantInfoById)",
@@ -101,12 +97,8 @@ public class TenantController extends BaseController {
             @ApiParam(value = TENANT_ID_PARAM_DESCRIPTION)
             @PathVariable(TENANT_ID) String strTenantId) throws ThingsboardException {
         checkParameter(TENANT_ID, strTenantId);
-        try {
-            TenantId tenantId = TenantId.fromUUID(toUUID(strTenantId));
-            return checkTenantInfoId(tenantId, Operation.READ);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        TenantId tenantId = TenantId.fromUUID(toUUID(strTenantId));
+        return checkTenantInfoId(tenantId, Operation.READ);
     }
 
     @ApiOperation(value = "Create Or update Tenant (saveTenant)",
@@ -154,12 +146,8 @@ public class TenantController extends BaseController {
             @RequestParam(required = false) String sortProperty,
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            return checkNotNull(tenantService.findTenants(pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        return checkNotNull(tenantService.findTenants(pageLink));
     }
 
     @ApiOperation(value = "Get Tenants Info (getTenants)", notes = "Returns a page of tenant info objects registered in the platform. "
@@ -179,12 +167,8 @@ public class TenantController extends BaseController {
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder
     ) throws ThingsboardException {
-        try {
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            return checkNotNull(tenantService.findTenantInfos(pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        return checkNotNull(tenantService.findTenantInfos(pageLink));
     }
 
 }
diff --git a/application/src/main/java/org/thingsboard/server/controller/TenantProfileController.java b/application/src/main/java/org/thingsboard/server/controller/TenantProfileController.java
index a28842a6ee..15c0e46836 100644
--- a/application/src/main/java/org/thingsboard/server/controller/TenantProfileController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/TenantProfileController.java
@@ -82,12 +82,8 @@ public class TenantProfileController extends BaseController {
             @ApiParam(value = TENANT_PROFILE_ID_PARAM_DESCRIPTION)
             @PathVariable("tenantProfileId") String strTenantProfileId) throws ThingsboardException {
         checkParameter("tenantProfileId", strTenantProfileId);
-        try {
-            TenantProfileId tenantProfileId = new TenantProfileId(toUUID(strTenantProfileId));
-            return checkTenantProfileId(tenantProfileId, Operation.READ);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        TenantProfileId tenantProfileId = new TenantProfileId(toUUID(strTenantProfileId));
+        return checkTenantProfileId(tenantProfileId, Operation.READ);
     }
 
     @ApiOperation(value = "Get Tenant Profile Info (getTenantProfileInfoById)",
@@ -99,12 +95,8 @@ public class TenantProfileController extends BaseController {
             @ApiParam(value = TENANT_PROFILE_ID_PARAM_DESCRIPTION)
             @PathVariable("tenantProfileId") String strTenantProfileId) throws ThingsboardException {
         checkParameter("tenantProfileId", strTenantProfileId);
-        try {
-            TenantProfileId tenantProfileId = new TenantProfileId(toUUID(strTenantProfileId));
-            return checkNotNull(tenantProfileService.findTenantProfileInfoById(getTenantId(), tenantProfileId));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        TenantProfileId tenantProfileId = new TenantProfileId(toUUID(strTenantProfileId));
+        return checkNotNull(tenantProfileService.findTenantProfileInfoById(getTenantId(), tenantProfileId));
     }
 
     @ApiOperation(value = "Get default Tenant Profile Info (getDefaultTenantProfileInfo)",
@@ -113,11 +105,7 @@ public class TenantProfileController extends BaseController {
     @RequestMapping(value = "/tenantProfileInfo/default", method = RequestMethod.GET)
     @ResponseBody
     public EntityInfo getDefaultTenantProfileInfo() throws ThingsboardException {
-        try {
-            return checkNotNull(tenantProfileService.findDefaultTenantProfileInfo(getTenantId()));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return checkNotNull(tenantProfileService.findDefaultTenantProfileInfo(getTenantId()));
     }
 
     @ApiOperation(value = "Create Or update Tenant Profile (saveTenantProfile)",
@@ -178,19 +166,15 @@ public class TenantProfileController extends BaseController {
     @ResponseBody
     public TenantProfile saveTenantProfile(@ApiParam(value = "A JSON value representing the tenant profile.")
                                            @RequestBody TenantProfile tenantProfile) throws ThingsboardException {
-        try {
-            TenantProfile oldProfile;
-            if (tenantProfile.getId() == null) {
-                accessControlService.checkPermission(getCurrentUser(), Resource.TENANT_PROFILE, Operation.CREATE);
-                oldProfile = null;
-            } else {
-                oldProfile = checkTenantProfileId(tenantProfile.getId(), Operation.WRITE);
-            }
-
-            return tbTenantProfileService.save(getTenantId(), tenantProfile, oldProfile);
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantProfile oldProfile;
+        if (tenantProfile.getId() == null) {
+            accessControlService.checkPermission(getCurrentUser(), Resource.TENANT_PROFILE, Operation.CREATE);
+            oldProfile = null;
+        } else {
+            oldProfile = checkTenantProfileId(tenantProfile.getId(), Operation.WRITE);
         }
+
+        return tbTenantProfileService.save(getTenantId(), tenantProfile, oldProfile);
     }
 
     @ApiOperation(value = "Delete Tenant Profile (deleteTenantProfile)",
@@ -200,14 +184,10 @@ public class TenantProfileController extends BaseController {
     @ResponseStatus(value = HttpStatus.OK)
     public void deleteTenantProfile(@ApiParam(value = TENANT_PROFILE_ID_PARAM_DESCRIPTION)
                                     @PathVariable("tenantProfileId") String strTenantProfileId) throws ThingsboardException {
-        try {
-            checkParameter("tenantProfileId", strTenantProfileId);
-            TenantProfileId tenantProfileId = new TenantProfileId(toUUID(strTenantProfileId));
-            TenantProfile profile = checkTenantProfileId(tenantProfileId, Operation.DELETE);
-            tbTenantProfileService.delete(getTenantId(), profile);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        checkParameter("tenantProfileId", strTenantProfileId);
+        TenantProfileId tenantProfileId = new TenantProfileId(toUUID(strTenantProfileId));
+        TenantProfile profile = checkTenantProfileId(tenantProfileId, Operation.DELETE);
+        tbTenantProfileService.delete(getTenantId(), profile);
     }
 
     @ApiOperation(value = "Make tenant profile default (setDefaultTenantProfile)",
@@ -219,14 +199,10 @@ public class TenantProfileController extends BaseController {
             @ApiParam(value = TENANT_PROFILE_ID_PARAM_DESCRIPTION)
             @PathVariable("tenantProfileId") String strTenantProfileId) throws ThingsboardException {
         checkParameter("tenantProfileId", strTenantProfileId);
-        try {
-            TenantProfileId tenantProfileId = new TenantProfileId(toUUID(strTenantProfileId));
-            TenantProfile tenantProfile = checkTenantProfileId(tenantProfileId, Operation.WRITE);
-            tenantProfileService.setDefaultTenantProfile(getTenantId(), tenantProfileId);
-            return tenantProfile;
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        TenantProfileId tenantProfileId = new TenantProfileId(toUUID(strTenantProfileId));
+        TenantProfile tenantProfile = checkTenantProfileId(tenantProfileId, Operation.WRITE);
+        tenantProfileService.setDefaultTenantProfile(getTenantId(), tenantProfileId);
+        return tenantProfile;
     }
 
     @ApiOperation(value = "Get Tenant Profiles (getTenantProfiles)", notes = "Returns a page of tenant profiles registered in the platform. " + PAGE_DATA_PARAMETERS + SYSTEM_AUTHORITY_PARAGRAPH)
@@ -244,12 +220,8 @@ public class TenantProfileController extends BaseController {
             @RequestParam(required = false) String sortProperty,
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            return checkNotNull(tenantProfileService.findTenantProfiles(getTenantId(), pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        return checkNotNull(tenantProfileService.findTenantProfiles(getTenantId(), pageLink));
     }
 
     @ApiOperation(value = "Get Tenant Profiles Info (getTenantProfileInfos)", notes = "Returns a page of tenant profile info objects registered in the platform. "
@@ -268,12 +240,8 @@ public class TenantProfileController extends BaseController {
             @RequestParam(required = false) String sortProperty,
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            return checkNotNull(tenantProfileService.findTenantProfileInfos(getTenantId(), pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        return checkNotNull(tenantProfileService.findTenantProfileInfos(getTenantId(), pageLink));
     }
 
     @GetMapping(value = "/tenantProfiles", params = {"ids"})
diff --git a/application/src/main/java/org/thingsboard/server/controller/UserController.java b/application/src/main/java/org/thingsboard/server/controller/UserController.java
index fadb920938..8ff6f850b1 100644
--- a/application/src/main/java/org/thingsboard/server/controller/UserController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/UserController.java
@@ -137,22 +137,18 @@ public class UserController extends BaseController {
             @ApiParam(value = USER_ID_PARAM_DESCRIPTION)
             @PathVariable(USER_ID) String strUserId) throws ThingsboardException {
         checkParameter(USER_ID, strUserId);
-        try {
-            UserId userId = new UserId(toUUID(strUserId));
-            User user = checkUserId(userId, Operation.READ);
-            if (user.getAdditionalInfo().isObject()) {
-                ObjectNode additionalInfo = (ObjectNode) user.getAdditionalInfo();
-                processDashboardIdFromAdditionalInfo(additionalInfo, DEFAULT_DASHBOARD);
-                processDashboardIdFromAdditionalInfo(additionalInfo, HOME_DASHBOARD);
-                UserCredentials userCredentials = userService.findUserCredentialsByUserId(user.getTenantId(), user.getId());
-                if (userCredentials.isEnabled() && !additionalInfo.has("userCredentialsEnabled")) {
-                    additionalInfo.put("userCredentialsEnabled", true);
-                }
+        UserId userId = new UserId(toUUID(strUserId));
+        User user = checkUserId(userId, Operation.READ);
+        if (user.getAdditionalInfo().isObject()) {
+            ObjectNode additionalInfo = (ObjectNode) user.getAdditionalInfo();
+            processDashboardIdFromAdditionalInfo(additionalInfo, DEFAULT_DASHBOARD);
+            processDashboardIdFromAdditionalInfo(additionalInfo, HOME_DASHBOARD);
+            UserCredentials userCredentials = userService.findUserCredentialsByUserId(user.getTenantId(), user.getId());
+            if (userCredentials.isEnabled() && !additionalInfo.has("userCredentialsEnabled")) {
+                additionalInfo.put("userCredentialsEnabled", true);
             }
-            return user;
-        } catch (Exception e) {
-            throw handleException(e);
         }
+        return user;
     }
 
     @ApiOperation(value = "Check Token Access Enabled (isUserTokenAccessEnabled)",
@@ -177,21 +173,17 @@ public class UserController extends BaseController {
             @ApiParam(value = USER_ID_PARAM_DESCRIPTION)
             @PathVariable(USER_ID) String strUserId) throws ThingsboardException {
         checkParameter(USER_ID, strUserId);
-        try {
-            if (!userTokenAccessEnabled) {
-                throw new ThingsboardException(YOU_DON_T_HAVE_PERMISSION_TO_PERFORM_THIS_OPERATION,
-                        ThingsboardErrorCode.PERMISSION_DENIED);
-            }
-            UserId userId = new UserId(toUUID(strUserId));
-            SecurityUser authUser = getCurrentUser();
-            User user = checkUserId(userId, Operation.READ);
-            UserPrincipal principal = new UserPrincipal(UserPrincipal.Type.USER_NAME, user.getEmail());
-            UserCredentials credentials = userService.findUserCredentialsByUserId(authUser.getTenantId(), userId);
-            SecurityUser securityUser = new SecurityUser(user, credentials.isEnabled(), principal);
-            return tokenFactory.createTokenPair(securityUser);
-        } catch (Exception e) {
-            throw handleException(e);
+        if (!userTokenAccessEnabled) {
+            throw new ThingsboardException(YOU_DON_T_HAVE_PERMISSION_TO_PERFORM_THIS_OPERATION,
+                    ThingsboardErrorCode.PERMISSION_DENIED);
         }
+        UserId userId = new UserId(toUUID(strUserId));
+        SecurityUser authUser = getCurrentUser();
+        User user = checkUserId(userId, Operation.READ);
+        UserPrincipal principal = new UserPrincipal(UserPrincipal.Type.USER_NAME, user.getEmail());
+        UserCredentials credentials = userService.findUserCredentialsByUserId(authUser.getTenantId(), userId);
+        SecurityUser securityUser = new SecurityUser(user, credentials.isEnabled(), principal);
+        return tokenFactory.createTokenPair(securityUser);
     }
 
     @ApiOperation(value = "Save Or update User (saveUser)",
@@ -226,23 +218,19 @@ public class UserController extends BaseController {
             @ApiParam(value = "Email of the user", required = true)
             @RequestParam(value = "email") String email,
             HttpServletRequest request) throws ThingsboardException {
-        try {
-            User user = checkNotNull(userService.findUserByEmail(getCurrentUser().getTenantId(), email));
-
-            accessControlService.checkPermission(getCurrentUser(), Resource.USER, Operation.READ,
-                    user.getId(), user);
-
-            UserCredentials userCredentials = userService.findUserCredentialsByUserId(getCurrentUser().getTenantId(), user.getId());
-            if (!userCredentials.isEnabled() && userCredentials.getActivateToken() != null) {
-                String baseUrl = systemSecurityService.getBaseUrl(getTenantId(), getCurrentUser().getCustomerId(), request);
-                String activateUrl = String.format(ACTIVATE_URL_PATTERN, baseUrl,
-                        userCredentials.getActivateToken());
-                mailService.sendActivationEmail(activateUrl, email);
-            } else {
-                throw new ThingsboardException("User is already activated!", ThingsboardErrorCode.BAD_REQUEST_PARAMS);
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        User user = checkNotNull(userService.findUserByEmail(getCurrentUser().getTenantId(), email));
+
+        accessControlService.checkPermission(getCurrentUser(), Resource.USER, Operation.READ,
+                user.getId(), user);
+
+        UserCredentials userCredentials = userService.findUserCredentialsByUserId(getCurrentUser().getTenantId(), user.getId());
+        if (!userCredentials.isEnabled() && userCredentials.getActivateToken() != null) {
+            String baseUrl = systemSecurityService.getBaseUrl(getTenantId(), getCurrentUser().getCustomerId(), request);
+            String activateUrl = String.format(ACTIVATE_URL_PATTERN, baseUrl,
+                    userCredentials.getActivateToken());
+            mailService.sendActivationEmail(activateUrl, email);
+        } else {
+            throw new ThingsboardException("User is already activated!", ThingsboardErrorCode.BAD_REQUEST_PARAMS);
         }
     }
 
@@ -257,21 +245,17 @@ public class UserController extends BaseController {
             @PathVariable(USER_ID) String strUserId,
             HttpServletRequest request) throws ThingsboardException {
         checkParameter(USER_ID, strUserId);
-        try {
-            UserId userId = new UserId(toUUID(strUserId));
-            User user = checkUserId(userId, Operation.READ);
-            SecurityUser authUser = getCurrentUser();
-            UserCredentials userCredentials = userService.findUserCredentialsByUserId(authUser.getTenantId(), user.getId());
-            if (!userCredentials.isEnabled() && userCredentials.getActivateToken() != null) {
-                String baseUrl = systemSecurityService.getBaseUrl(getTenantId(), getCurrentUser().getCustomerId(), request);
-                String activateUrl = String.format(ACTIVATE_URL_PATTERN, baseUrl,
-                        userCredentials.getActivateToken());
-                return activateUrl;
-            } else {
-                throw new ThingsboardException("User is already activated!", ThingsboardErrorCode.BAD_REQUEST_PARAMS);
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        UserId userId = new UserId(toUUID(strUserId));
+        User user = checkUserId(userId, Operation.READ);
+        SecurityUser authUser = getCurrentUser();
+        UserCredentials userCredentials = userService.findUserCredentialsByUserId(authUser.getTenantId(), user.getId());
+        if (!userCredentials.isEnabled() && userCredentials.getActivateToken() != null) {
+            String baseUrl = systemSecurityService.getBaseUrl(getTenantId(), getCurrentUser().getCustomerId(), request);
+            String activateUrl = String.format(ACTIVATE_URL_PATTERN, baseUrl,
+                    userCredentials.getActivateToken());
+            return activateUrl;
+        } else {
+            throw new ThingsboardException("User is already activated!", ThingsboardErrorCode.BAD_REQUEST_PARAMS);
         }
     }
 
@@ -310,16 +294,12 @@ public class UserController extends BaseController {
             @RequestParam(required = false) String sortProperty,
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            SecurityUser currentUser = getCurrentUser();
-            if (Authority.TENANT_ADMIN.equals(currentUser.getAuthority())) {
-                return checkNotNull(userService.findUsersByTenantId(currentUser.getTenantId(), pageLink));
-            } else {
-                return checkNotNull(userService.findCustomerUsers(currentUser.getTenantId(), currentUser.getCustomerId(), pageLink));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        SecurityUser currentUser = getCurrentUser();
+        if (Authority.TENANT_ADMIN.equals(currentUser.getAuthority())) {
+            return checkNotNull(userService.findUsersByTenantId(currentUser.getTenantId(), pageLink));
+        } else {
+            return checkNotNull(userService.findCustomerUsers(currentUser.getTenantId(), currentUser.getCustomerId(), pageLink));
         }
     }
 
@@ -380,13 +360,9 @@ public class UserController extends BaseController {
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
         checkParameter("tenantId", strTenantId);
-        try {
-            TenantId tenantId = TenantId.fromUUID(toUUID(strTenantId));
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            return checkNotNull(userService.findTenantAdmins(tenantId, pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        TenantId tenantId = TenantId.fromUUID(toUUID(strTenantId));
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        return checkNotNull(userService.findTenantAdmins(tenantId, pageLink));
     }
 
     @ApiOperation(value = "Get Customer Users (getCustomerUsers)",
@@ -408,15 +384,11 @@ public class UserController extends BaseController {
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
         checkParameter("customerId", strCustomerId);
-        try {
-            CustomerId customerId = new CustomerId(toUUID(strCustomerId));
-            checkCustomerId(customerId, Operation.READ);
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            TenantId tenantId = getCurrentUser().getTenantId();
-            return checkNotNull(userService.findCustomerUsers(tenantId, customerId, pageLink));
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        CustomerId customerId = new CustomerId(toUUID(strCustomerId));
+        checkCustomerId(customerId, Operation.READ);
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        return checkNotNull(userService.findCustomerUsers(tenantId, customerId, pageLink));
     }
 
     @ApiOperation(value = "Enable/Disable User credentials (setUserCredentialsEnabled)",
@@ -430,17 +402,13 @@ public class UserController extends BaseController {
             @ApiParam(value = "Disable (\"true\") or enable (\"false\") the credentials.", defaultValue = "true")
             @RequestParam(required = false, defaultValue = "true") boolean userCredentialsEnabled) throws ThingsboardException {
         checkParameter(USER_ID, strUserId);
-        try {
-            UserId userId = new UserId(toUUID(strUserId));
-            User user = checkUserId(userId, Operation.WRITE);
-            TenantId tenantId = getCurrentUser().getTenantId();
-            userService.setUserCredentialsEnabled(tenantId, userId, userCredentialsEnabled);
-
-            if (!userCredentialsEnabled) {
-                eventPublisher.publishEvent(new UserCredentialsInvalidationEvent(userId));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        UserId userId = new UserId(toUUID(strUserId));
+        User user = checkUserId(userId, Operation.WRITE);
+        TenantId tenantId = getCurrentUser().getTenantId();
+        userService.setUserCredentialsEnabled(tenantId, userId, userCredentialsEnabled);
+
+        if (!userCredentialsEnabled) {
+            eventPublisher.publishEvent(new UserCredentialsInvalidationEvent(userId));
         }
     }
 
diff --git a/application/src/main/java/org/thingsboard/server/controller/WidgetTypeController.java b/application/src/main/java/org/thingsboard/server/controller/WidgetTypeController.java
index e4770de95b..d1ecd0441a 100644
--- a/application/src/main/java/org/thingsboard/server/controller/WidgetTypeController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/WidgetTypeController.java
@@ -70,12 +70,8 @@ public class WidgetTypeController extends AutoCommitController {
             @ApiParam(value = WIDGET_TYPE_ID_PARAM_DESCRIPTION, required = true)
             @PathVariable("widgetTypeId") String strWidgetTypeId) throws ThingsboardException {
         checkParameter("widgetTypeId", strWidgetTypeId);
-        try {
-            WidgetTypeId widgetTypeId = new WidgetTypeId(toUUID(strWidgetTypeId));
-            return checkWidgetTypeId(widgetTypeId, Operation.READ);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        WidgetTypeId widgetTypeId = new WidgetTypeId(toUUID(strWidgetTypeId));
+        return checkWidgetTypeId(widgetTypeId, Operation.READ);
     }
 
     @ApiOperation(value = "Create Or Update Widget Type (saveWidgetType)",
@@ -93,32 +89,28 @@ public class WidgetTypeController extends AutoCommitController {
     @ResponseBody
     public WidgetTypeDetails saveWidgetType(
             @ApiParam(value = "A JSON value representing the Widget Type Details.", required = true)
-            @RequestBody WidgetTypeDetails widgetTypeDetails) throws ThingsboardException {
-        try {
-            var currentUser = getCurrentUser();
-            if (Authority.SYS_ADMIN.equals(currentUser.getAuthority())) {
-                widgetTypeDetails.setTenantId(TenantId.SYS_TENANT_ID);
-            } else {
-                widgetTypeDetails.setTenantId(currentUser.getTenantId());
-            }
+            @RequestBody WidgetTypeDetails widgetTypeDetails) throws Exception {
+        var currentUser = getCurrentUser();
+        if (Authority.SYS_ADMIN.equals(currentUser.getAuthority())) {
+            widgetTypeDetails.setTenantId(TenantId.SYS_TENANT_ID);
+        } else {
+            widgetTypeDetails.setTenantId(currentUser.getTenantId());
+        }
 
-            checkEntity(widgetTypeDetails.getId(), widgetTypeDetails, Resource.WIDGET_TYPE);
-            WidgetTypeDetails savedWidgetTypeDetails = widgetTypeService.saveWidgetType(widgetTypeDetails);
+        checkEntity(widgetTypeDetails.getId(), widgetTypeDetails, Resource.WIDGET_TYPE);
+        WidgetTypeDetails savedWidgetTypeDetails = widgetTypeService.saveWidgetType(widgetTypeDetails);
 
-            if (!Authority.SYS_ADMIN.equals(currentUser.getAuthority())) {
-                WidgetsBundle widgetsBundle = widgetsBundleService.findWidgetsBundleByTenantIdAndAlias(widgetTypeDetails.getTenantId(), widgetTypeDetails.getBundleAlias());
-                if (widgetsBundle != null) {
-                    autoCommit(currentUser, widgetsBundle.getId());
-                }
+        if (!Authority.SYS_ADMIN.equals(currentUser.getAuthority())) {
+            WidgetsBundle widgetsBundle = widgetsBundleService.findWidgetsBundleByTenantIdAndAlias(widgetTypeDetails.getTenantId(), widgetTypeDetails.getBundleAlias());
+            if (widgetsBundle != null) {
+                autoCommit(currentUser, widgetsBundle.getId());
             }
+        }
 
-            sendEntityNotificationMsg(getTenantId(), savedWidgetTypeDetails.getId(),
-                    widgetTypeDetails.getId() == null ? EdgeEventActionType.ADDED : EdgeEventActionType.UPDATED);
+        sendEntityNotificationMsg(getTenantId(), savedWidgetTypeDetails.getId(),
+                widgetTypeDetails.getId() == null ? EdgeEventActionType.ADDED : EdgeEventActionType.UPDATED);
 
-            return checkNotNull(savedWidgetTypeDetails);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return checkNotNull(savedWidgetTypeDetails);
     }
 
     @ApiOperation(value = "Delete widget type (deleteWidgetType)",
@@ -128,26 +120,21 @@ public class WidgetTypeController extends AutoCommitController {
     @ResponseStatus(value = HttpStatus.OK)
     public void deleteWidgetType(
             @ApiParam(value = WIDGET_TYPE_ID_PARAM_DESCRIPTION, required = true)
-            @PathVariable("widgetTypeId") String strWidgetTypeId) throws ThingsboardException {
+            @PathVariable("widgetTypeId") String strWidgetTypeId) throws Exception {
         checkParameter("widgetTypeId", strWidgetTypeId);
-        try {
-            var currentUser = getCurrentUser();
-            WidgetTypeId widgetTypeId = new WidgetTypeId(toUUID(strWidgetTypeId));
-            WidgetTypeDetails wtd = checkWidgetTypeId(widgetTypeId, Operation.DELETE);
-            widgetTypeService.deleteWidgetType(currentUser.getTenantId(), widgetTypeId);
-
-            if (wtd != null && !Authority.SYS_ADMIN.equals(currentUser.getAuthority())) {
-                WidgetsBundle widgetsBundle = widgetsBundleService.findWidgetsBundleByTenantIdAndAlias(wtd.getTenantId(), wtd.getBundleAlias());
-                if (widgetsBundle != null) {
-                    autoCommit(currentUser, widgetsBundle.getId());
-                }
+        var currentUser = getCurrentUser();
+        WidgetTypeId widgetTypeId = new WidgetTypeId(toUUID(strWidgetTypeId));
+        WidgetTypeDetails wtd = checkWidgetTypeId(widgetTypeId, Operation.DELETE);
+        widgetTypeService.deleteWidgetType(currentUser.getTenantId(), widgetTypeId);
+
+        if (wtd != null && !Authority.SYS_ADMIN.equals(currentUser.getAuthority())) {
+            WidgetsBundle widgetsBundle = widgetsBundleService.findWidgetsBundleByTenantIdAndAlias(wtd.getTenantId(), wtd.getBundleAlias());
+            if (widgetsBundle != null) {
+                autoCommit(currentUser, widgetsBundle.getId());
             }
-
-            sendEntityNotificationMsg(getTenantId(), widgetTypeId, EdgeEventActionType.DELETED);
-
-        } catch (Exception e) {
-            throw handleException(e);
         }
+
+        sendEntityNotificationMsg(getTenantId(), widgetTypeId, EdgeEventActionType.DELETED);
     }
 
     @ApiOperation(value = "Get all Widget types for specified Bundle (getBundleWidgetTypes)",
@@ -160,17 +147,13 @@ public class WidgetTypeController extends AutoCommitController {
             @RequestParam boolean isSystem,
             @ApiParam(value = "Widget Bundle alias", required = true)
             @RequestParam String bundleAlias) throws ThingsboardException {
-        try {
-            TenantId tenantId;
-            if (isSystem) {
-                tenantId = TenantId.SYS_TENANT_ID;
-            } else {
-                tenantId = getCurrentUser().getTenantId();
-            }
-            return checkNotNull(widgetTypeService.findWidgetTypesByTenantIdAndBundleAlias(tenantId, bundleAlias));
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId;
+        if (isSystem) {
+            tenantId = TenantId.SYS_TENANT_ID;
+        } else {
+            tenantId = getCurrentUser().getTenantId();
         }
+        return checkNotNull(widgetTypeService.findWidgetTypesByTenantIdAndBundleAlias(tenantId, bundleAlias));
     }
 
     @ApiOperation(value = "Get all Widget types details for specified Bundle (getBundleWidgetTypes)",
@@ -183,17 +166,13 @@ public class WidgetTypeController extends AutoCommitController {
             @RequestParam boolean isSystem,
             @ApiParam(value = "Widget Bundle alias", required = true)
             @RequestParam String bundleAlias) throws ThingsboardException {
-        try {
-            TenantId tenantId;
-            if (isSystem) {
-                tenantId = TenantId.SYS_TENANT_ID;
-            } else {
-                tenantId = getCurrentUser().getTenantId();
-            }
-            return checkNotNull(widgetTypeService.findWidgetTypesDetailsByTenantIdAndBundleAlias(tenantId, bundleAlias));
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId;
+        if (isSystem) {
+            tenantId = TenantId.SYS_TENANT_ID;
+        } else {
+            tenantId = getCurrentUser().getTenantId();
         }
+        return checkNotNull(widgetTypeService.findWidgetTypesDetailsByTenantIdAndBundleAlias(tenantId, bundleAlias));
     }
 
     @ApiOperation(value = "Get Widget Type Info objects (getBundleWidgetTypesInfos)",
@@ -206,17 +185,13 @@ public class WidgetTypeController extends AutoCommitController {
             @RequestParam boolean isSystem,
             @ApiParam(value = "Widget Bundle alias", required = true)
             @RequestParam String bundleAlias) throws ThingsboardException {
-        try {
-            TenantId tenantId;
-            if (isSystem) {
-                tenantId = TenantId.SYS_TENANT_ID;
-            } else {
-                tenantId = getCurrentUser().getTenantId();
-            }
-            return checkNotNull(widgetTypeService.findWidgetTypesInfosByTenantIdAndBundleAlias(tenantId, bundleAlias));
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId;
+        if (isSystem) {
+            tenantId = TenantId.SYS_TENANT_ID;
+        } else {
+            tenantId = getCurrentUser().getTenantId();
         }
+        return checkNotNull(widgetTypeService.findWidgetTypesInfosByTenantIdAndBundleAlias(tenantId, bundleAlias));
     }
 
     @ApiOperation(value = "Get Widget Type (getWidgetType)",
@@ -231,20 +206,16 @@ public class WidgetTypeController extends AutoCommitController {
             @RequestParam String bundleAlias,
             @ApiParam(value = "Widget Type alias", required = true)
             @RequestParam String alias) throws ThingsboardException {
-        try {
-            TenantId tenantId;
-            if (isSystem) {
-                tenantId = TenantId.fromUUID(ModelConstants.NULL_UUID);
-            } else {
-                tenantId = getCurrentUser().getTenantId();
-            }
-            WidgetType widgetType = widgetTypeService.findWidgetTypeByTenantIdBundleAliasAndAlias(tenantId, bundleAlias, alias);
-            checkNotNull(widgetType);
-            accessControlService.checkPermission(getCurrentUser(), Resource.WIDGET_TYPE, Operation.READ, widgetType.getId(), widgetType);
-            return widgetType;
-        } catch (Exception e) {
-            throw handleException(e);
+        TenantId tenantId;
+        if (isSystem) {
+            tenantId = TenantId.fromUUID(ModelConstants.NULL_UUID);
+        } else {
+            tenantId = getCurrentUser().getTenantId();
         }
+        WidgetType widgetType = widgetTypeService.findWidgetTypeByTenantIdBundleAliasAndAlias(tenantId, bundleAlias, alias);
+        checkNotNull(widgetType);
+        accessControlService.checkPermission(getCurrentUser(), Resource.WIDGET_TYPE, Operation.READ, widgetType.getId(), widgetType);
+        return widgetType;
     }
 
 }
diff --git a/application/src/main/java/org/thingsboard/server/controller/WidgetsBundleController.java b/application/src/main/java/org/thingsboard/server/controller/WidgetsBundleController.java
index f142b2e4b7..23331d95f4 100644
--- a/application/src/main/java/org/thingsboard/server/controller/WidgetsBundleController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/WidgetsBundleController.java
@@ -74,12 +74,8 @@ public class WidgetsBundleController extends BaseController {
             @ApiParam(value = WIDGET_BUNDLE_ID_PARAM_DESCRIPTION, required = true)
             @PathVariable("widgetsBundleId") String strWidgetsBundleId) throws ThingsboardException {
         checkParameter("widgetsBundleId", strWidgetsBundleId);
-        try {
-            WidgetsBundleId widgetsBundleId = new WidgetsBundleId(toUUID(strWidgetsBundleId));
-            return checkWidgetsBundleId(widgetsBundleId, Operation.READ);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        WidgetsBundleId widgetsBundleId = new WidgetsBundleId(toUUID(strWidgetsBundleId));
+        return checkWidgetsBundleId(widgetsBundleId, Operation.READ);
     }
 
     @ApiOperation(value = "Create Or Update Widget Bundle (saveWidgetsBundle)",
@@ -141,16 +137,12 @@ public class WidgetsBundleController extends BaseController {
             @RequestParam(required = false) String sortProperty,
             @ApiParam(value = SORT_ORDER_DESCRIPTION, allowableValues = SORT_ORDER_ALLOWABLE_VALUES)
             @RequestParam(required = false) String sortOrder) throws ThingsboardException {
-        try {
-            PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
-            if (Authority.SYS_ADMIN.equals(getCurrentUser().getAuthority())) {
-                return checkNotNull(widgetsBundleService.findSystemWidgetsBundlesByPageLink(getTenantId(), pageLink));
-            } else {
-                TenantId tenantId = getCurrentUser().getTenantId();
-                return checkNotNull(widgetsBundleService.findAllTenantWidgetsBundlesByTenantIdAndPageLink(tenantId, pageLink));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        PageLink pageLink = createPageLink(pageSize, page, textSearch, sortProperty, sortOrder);
+        if (Authority.SYS_ADMIN.equals(getCurrentUser().getAuthority())) {
+            return checkNotNull(widgetsBundleService.findSystemWidgetsBundlesByPageLink(getTenantId(), pageLink));
+        } else {
+            TenantId tenantId = getCurrentUser().getTenantId();
+            return checkNotNull(widgetsBundleService.findAllTenantWidgetsBundlesByTenantIdAndPageLink(tenantId, pageLink));
         }
     }
 
@@ -160,15 +152,11 @@ public class WidgetsBundleController extends BaseController {
     @RequestMapping(value = "/widgetsBundles", method = RequestMethod.GET)
     @ResponseBody
     public List<WidgetsBundle> getWidgetsBundles() throws ThingsboardException {
-        try {
-            if (Authority.SYS_ADMIN.equals(getCurrentUser().getAuthority())) {
-                return checkNotNull(widgetsBundleService.findSystemWidgetsBundles(getTenantId()));
-            } else {
-                TenantId tenantId = getCurrentUser().getTenantId();
-                return checkNotNull(widgetsBundleService.findAllTenantWidgetsBundlesByTenantId(tenantId));
-            }
-        } catch (Exception e) {
-            throw handleException(e);
+        if (Authority.SYS_ADMIN.equals(getCurrentUser().getAuthority())) {
+            return checkNotNull(widgetsBundleService.findSystemWidgetsBundles(getTenantId()));
+        } else {
+            TenantId tenantId = getCurrentUser().getTenantId();
+            return checkNotNull(widgetsBundleService.findAllTenantWidgetsBundlesByTenantId(tenantId));
         }
     }
 
diff --git a/application/src/main/java/org/thingsboard/server/service/sms/DefaultSmsService.java b/application/src/main/java/org/thingsboard/server/service/sms/DefaultSmsService.java
index 7cd4998b5d..a16b2df3f8 100644
--- a/application/src/main/java/org/thingsboard/server/service/sms/DefaultSmsService.java
+++ b/application/src/main/java/org/thingsboard/server/service/sms/DefaultSmsService.java
@@ -114,11 +114,7 @@ public class DefaultSmsService implements SmsService {
     @Override
     public void sendTestSms(TestSmsRequest testSmsRequest) throws ThingsboardException {
         SmsSender testSmsSender;
-        try {
-            testSmsSender = this.smsSenderFactory.createSmsSender(testSmsRequest.getProviderConfiguration());
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        testSmsSender = this.smsSenderFactory.createSmsSender(testSmsRequest.getProviderConfiguration());
         this.sendSms(testSmsSender, testSmsRequest.getNumberTo(), testSmsRequest.getMessage());
         testSmsSender.destroy();
     }
@@ -129,11 +125,7 @@ public class DefaultSmsService implements SmsService {
     }
 
     private int sendSms(SmsSender smsSender, String numberTo, String message) throws ThingsboardException {
-        try {
-            return smsSender.sendSms(numberTo, message);
-        } catch (Exception e) {
-            throw handleException(e);
-        }
+        return smsSender.sendSms(numberTo, message);
     }
 
     private ThingsboardException handleException(Exception exception) {