Improve WS errors handling.

application/src/main/java/org/thingsboard/server/controller/plugin/TbWebSocketHandler.java

@@ -263,7 +263,7 @@ public class TbWebSocketHandler extends TextWebSocketHandler implements Telemetr
                     if (regularUserSessions.size() < maxSessionsPerRegularUser) {
                         regularUserSessions.add(sessionId);
                     } else {
-                        log.info("[{}][{}][{}] Failed to start session. Max user sessions limit reached"
+                        log.info("[{}][{}][{}] Failed to start session. Max regular user sessions limit reached"
                                 , sessionRef.getSecurityCtx().getTenantId(), sessionRef.getSecurityCtx().getId(), sessionId);
                         session.close(CloseStatus.POLICY_VIOLATION.withReason("Max regular user sessions limit reached"));
                         return false;
@@ -276,7 +276,7 @@ public class TbWebSocketHandler extends TextWebSocketHandler implements Telemetr
                     if (publicUserSessions.size() < maxSessionsPerPublicUser) {
                         publicUserSessions.add(sessionId);
                     } else {
-                        log.info("[{}][{}][{}] Failed to start session. Max user sessions limit reached"
+                        log.info("[{}][{}][{}] Failed to start session. Max public user sessions limit reached"
                                 , sessionRef.getSecurityCtx().getTenantId(), sessionRef.getSecurityCtx().getId(), sessionId);
                         session.close(CloseStatus.POLICY_VIOLATION.withReason("Max public user sessions limit reached"));
                         return false;

application/src/main/java/org/thingsboard/server/service/telemetry/DefaultTelemetryWebSocketService.java

@@ -266,7 +266,7 @@ public class DefaultTelemetryWebSocketService implements TelemetryWebSocketServi
                         } else if (customerSessions.size() < maxSubscriptionsPerCustomer) {
                             customerSessions.add(subId);
                         } else {
-                            log.info("[{}][{}][{}] Failed to start subscription. Max customer sessions limit reached"
+                            log.info("[{}][{}][{}] Failed to start subscription. Max customer subscriptions limit reached"
                                     , sessionRef.getSecurityCtx().getTenantId(), sessionRef.getSecurityCtx().getId(), subId);
                             msgEndpoint.close(sessionRef, CloseStatus.POLICY_VIOLATION.withReason("Max customer subscriptions limit reached"));
                             return false;
@@ -279,7 +279,7 @@ public class DefaultTelemetryWebSocketService implements TelemetryWebSocketServi
                         if (regularUserSessions.size() < maxSubscriptionsPerRegularUser) {
                             regularUserSessions.add(subId);
                         } else {
-                            log.info("[{}][{}][{}] Failed to start subscription. Max user sessions limit reached"
+                            log.info("[{}][{}][{}] Failed to start subscription. Max regular user subscriptions limit reached"
                                     , sessionRef.getSecurityCtx().getTenantId(), sessionRef.getSecurityCtx().getId(), subId);
                             msgEndpoint.close(sessionRef, CloseStatus.POLICY_VIOLATION.withReason("Max regular user subscriptions limit reached"));
                             return false;
@@ -292,7 +292,7 @@ public class DefaultTelemetryWebSocketService implements TelemetryWebSocketServi
                         if (publicUserSessions.size() < maxSubscriptionsPerPublicUser) {
                             publicUserSessions.add(subId);
                         } else {
-                            log.info("[{}][{}][{}] Failed to start subscription. Max user sessions limit reached"
+                            log.info("[{}][{}][{}] Failed to start subscription. Max public user subscriptions limit reached"
                                     , sessionRef.getSecurityCtx().getTenantId(), sessionRef.getSecurityCtx().getId(), subId);
                             msgEndpoint.close(sessionRef, CloseStatus.POLICY_VIOLATION.withReason("Max public user subscriptions limit reached"));
                             return false;

ui/src/app/api/telemetry-websocket.service.js

@@ -26,7 +26,7 @@ const WS_IDLE_TIMEOUT = 90000;
 const MAX_PUBLISH_COMMANDS = 10;
 
 /*@ngInject*/
-function TelemetryWebsocketService($rootScope, $websocket, $timeout, $window, toast, types, userService) {
+function TelemetryWebsocketService($rootScope, $websocket, $timeout, $window, $mdUtil, toast, types, userService) {
 
     var isOpening = false,
         isOpened = false,
@@ -111,7 +111,10 @@ function TelemetryWebsocketService($rootScope, $websocket, $timeout, $window, to
         }
     }
 
-    function onError (/*message*/) {
+    function onError (errorEvent) {
+        if (errorEvent) {
+            showWsError(0, errorEvent);
+        }
         isOpening = false;
     }
 
@@ -137,7 +140,10 @@ function TelemetryWebsocketService($rootScope, $websocket, $timeout, $window, to
         }
     }
 
-    function onClose () {
+    function onClose (closeEvent) {
+        if (closeEvent && closeEvent.code > 1000) {
+            showWsError(closeEvent.code, closeEvent.reason);
+        }
         isOpening = false;
         isOpened = false;
         if (isActive) {
@@ -191,7 +197,9 @@ function TelemetryWebsocketService($rootScope, $websocket, $timeout, $window, to
         } else {
             message += "error code - " + errorCode + ".";
         }
-        toast.showError(message);
+        $mdUtil.nextTick(function () {
+            toast.showError(message);
+        });
     }
 
     function fetchKeys(subscriptionId) {

ui/src/app/services/toast.scss

@@ -16,18 +16,21 @@
 
 md-toast.tb-info-toast .md-toast-content {
   height: 100%;
+  max-height: 100%;
   padding: 18px;
   font-size: 18px;
 }
 
 md-toast.tb-success-toast .md-toast-content {
   height: 100%;
+  max-height: 100%;
   font-size: 18px !important;
   background-color: #008000;
 }
 
 md-toast.tb-error-toast .md-toast-content {
   height: 100%;
+  max-height: 100%;
   font-size: 18px !important;
   background-color: #800000;
 }