diff --git a/common/data/src/main/java/org/thingsboard/server/common/data/alarm/AlarmCommentInfo.java b/common/data/src/main/java/org/thingsboard/server/common/data/alarm/AlarmCommentInfo.java
index 247e0e5236..dbf603fdbc 100644
--- a/common/data/src/main/java/org/thingsboard/server/common/data/alarm/AlarmCommentInfo.java
+++ b/common/data/src/main/java/org/thingsboard/server/common/data/alarm/AlarmCommentInfo.java
@@ -17,15 +17,19 @@ package org.thingsboard.server.common.data.alarm;
 
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
 
 @ApiModel
+@Data
+@EqualsAndHashCode(callSuper = true)
 public class AlarmCommentInfo extends AlarmComment {
     private static final long serialVersionUID = 2807343093519543377L;
 
-    @ApiModelProperty(position = 19, value = "User name", example = "John")
+    @ApiModelProperty(position = 19, value = "User first name", example = "John")
     private String firstName;
 
-    @ApiModelProperty(position = 19, value = "User name", example = "Brown")
+    @ApiModelProperty(position = 19, value = "User last name", example = "Brown")
     private String lastName;
 
     public AlarmCommentInfo() {
@@ -41,52 +45,4 @@ public class AlarmCommentInfo extends AlarmComment {
         this.firstName = firstName;
         this.lastName = lastName;
     }
-
-    public String getFirstName() {
-        return firstName;
-    }
-
-    public void setFirstName(String firstName) {
-        this.firstName = firstName;
-    }
-
-    public String getLastName() {
-        return lastName;
-    }
-
-    public void setLastName(String lastName) {
-        this.lastName = lastName;
-    }
-
-    @Override
-    public boolean equals(Object o) {
-        if (this == o) return true;
-        if (o == null || getClass() != o.getClass()) return false;
-        if (!super.equals(o)) return false;
-
-        AlarmCommentInfo alarmCommentInfo = (AlarmCommentInfo) o;
-
-        if (firstName == null) {
-            if (alarmCommentInfo.firstName != null)
-                return false;
-        } else if (!firstName.equals(alarmCommentInfo.firstName))
-            return false;
-
-        if (lastName == null) {
-            if (alarmCommentInfo.lastName != null)
-                return false;
-        } else if (!lastName.equals(alarmCommentInfo.lastName))
-            return false;
-
-        return true;
-
-    }
-
-    @Override
-    public int hashCode() {
-        int result = super.hashCode();
-        result = 31 * result + (firstName != null ? firstName.hashCode() : 0);
-        result = 31 * result + (lastName != null ? lastName.hashCode() : 0);
-        return result;
-    }
 }
diff --git a/common/data/src/main/java/org/thingsboard/server/common/data/id/AlarmCommentId.java b/common/data/src/main/java/org/thingsboard/server/common/data/id/AlarmCommentId.java
index b13b5837a0..3e0c415b0f 100644
--- a/common/data/src/main/java/org/thingsboard/server/common/data/id/AlarmCommentId.java
+++ b/common/data/src/main/java/org/thingsboard/server/common/data/id/AlarmCommentId.java
@@ -26,7 +26,7 @@ import java.util.UUID;
 @ApiModel
 public class AlarmCommentId extends UUIDBased implements EntityId{
 
-    private static final long serialVersionUID = 2L;
+    private static final long serialVersionUID = 1L;
 
     @JsonCreator
     public AlarmCommentId(@JsonProperty("id") UUID id) {
diff --git a/dao/src/main/java/org/thingsboard/server/dao/alarm/BaseAlarmCommentService.java b/dao/src/main/java/org/thingsboard/server/dao/alarm/BaseAlarmCommentService.java
index b7a1554d67..1de9080a00 100644
--- a/dao/src/main/java/org/thingsboard/server/dao/alarm/BaseAlarmCommentService.java
+++ b/dao/src/main/java/org/thingsboard/server/dao/alarm/BaseAlarmCommentService.java
@@ -63,7 +63,6 @@ public class BaseAlarmCommentService extends AbstractEntityService implements Al
     }
 
     @Override
-    @Transactional
     public AlarmCommentOperationResult deleteAlarmComment(TenantId tenantId, AlarmCommentId alarmCommentId) {
         log.debug("Deleting Alarm Comment with id: {}", alarmCommentId);
         AlarmCommentOperationResult result = new AlarmCommentOperationResult(new AlarmComment(), true);
@@ -73,13 +72,14 @@ public class BaseAlarmCommentService extends AbstractEntityService implements Al
 
     @Override
     public PageData<AlarmCommentInfo> findAlarmComments(TenantId tenantId, AlarmId alarmId, PageLink pageLink) {
+        log.trace("Executing findAlarmComments by alarmId [{}]", alarmId);
         return alarmCommentDao.findAlarmComments(tenantId, alarmId, pageLink);
     }
 
     @Override
     public ListenableFuture<AlarmComment> findAlarmCommentByIdAsync(TenantId tenantId, AlarmCommentId alarmCommentId) {
-        log.trace("Executing findAlarmCommentByIdAsync [{}]", alarmCommentId);
-        validateId(alarmCommentId, "Incorrect alarmId " + alarmCommentId);
+        log.trace("Executing findAlarmCommentByIdAsync by alarmCommentId [{}]", alarmCommentId);
+        validateId(alarmCommentId, "Incorrect alarmCommentId " + alarmCommentId);
         return alarmCommentDao.findAlarmCommentByIdAsync(tenantId, alarmCommentId.getId());
     }
 
diff --git a/dao/src/main/java/org/thingsboard/server/dao/sql/alarm/JpaAlarmCommentDao.java b/dao/src/main/java/org/thingsboard/server/dao/sql/alarm/JpaAlarmCommentDao.java
index 8b8b845b2e..f36405ce1c 100644
--- a/dao/src/main/java/org/thingsboard/server/dao/sql/alarm/JpaAlarmCommentDao.java
+++ b/dao/src/main/java/org/thingsboard/server/dao/sql/alarm/JpaAlarmCommentDao.java
@@ -69,18 +69,20 @@ public class JpaAlarmCommentDao extends JpaAbstractDao<AlarmCommentEntity, Alarm
 
     @Override
     public PageData<AlarmCommentInfo> findAlarmComments(TenantId tenantId, AlarmId id, PageLink pageLink){
-        log.trace("Try to find alarm comments by alard id using [{}]", id);
+        log.trace("Try to find alarm comments by alarm id using [{}]", id);
         return DaoUtil.toPageData(
                 alarmCommentRepository.findAllByAlarmId(id.getId(), DaoUtil.toPageable(pageLink)));
     }
 
     @Override
     public AlarmComment findAlarmCommentById(TenantId tenantId, UUID key) {
+        log.trace("Try to find alarm comment by id using [{}]", key);
         return DaoUtil.getData(alarmCommentRepository.findById(key));
     }
 
     @Override
     public ListenableFuture<AlarmComment> findAlarmCommentByIdAsync(TenantId tenantId, UUID key) {
+        log.trace("Try to find alarm comment by id using [{}]", key);
         return findByIdAsync(tenantId, key);
     }