diff --git a/dao/src/main/java/org/thingsboard/server/dao/sql/queue/InMemoryMsgQueue.java b/dao/src/main/java/org/thingsboard/server/dao/sql/queue/InMemoryMsgQueue.java
index ce579cd00c..2825331623 100644
--- a/dao/src/main/java/org/thingsboard/server/dao/sql/queue/InMemoryMsgQueue.java
+++ b/dao/src/main/java/org/thingsboard/server/dao/sql/queue/InMemoryMsgQueue.java
@@ -22,7 +22,6 @@ import com.google.common.util.concurrent.MoreExecutors;
 import lombok.Getter;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
-import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.stereotype.Component;
 import org.thingsboard.server.common.msg.TbMsg;
 import org.thingsboard.server.dao.queue.MsgQueue;
@@ -30,12 +29,7 @@ import org.thingsboard.server.dao.util.SqlDao;
 
 import javax.annotation.PostConstruct;
 import javax.annotation.PreDestroy;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.UUID;
+import java.util.*;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Executors;
 import java.util.concurrent.atomic.AtomicLong;
@@ -72,13 +66,13 @@ public class InMemoryMsgQueue implements MsgQueue {
 
     @Override
     public ListenableFuture<Void> put(TbMsg msg, UUID nodeId, long clusterPartition) {
-        if (pendingMsgCount.get() < maxSize) {
+        if (pendingMsgCount.incrementAndGet() < maxSize) {
             return queueExecutor.submit(() -> {
                 data.computeIfAbsent(new InMemoryMsgKey(nodeId, clusterPartition), key -> new HashMap<>()).put(msg.getId(), msg);
-                pendingMsgCount.incrementAndGet();
                 return null;
             });
         } else {
+            pendingMsgCount.decrementAndGet();
             return Futures.immediateFailedFuture(new RuntimeException("Message queue is full!"));
         }
     }
diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/action/TbLogNode.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/action/TbLogNode.java
index b6f53dba9c..595826f9ba 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/action/TbLogNode.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/action/TbLogNode.java
@@ -30,7 +30,7 @@ import static org.thingsboard.rule.engine.api.TbRelationTypes.SUCCESS;
         name = "log",
         configClazz = TbLogNodeConfiguration.class,
         nodeDescription = "Log incoming messages using JS script for transformation Message into String",
-        nodeDetails = "Transform incoming Message with configured JS condition to String and log final value. " +
+        nodeDetails = "Transform incoming Message with configured JS function to String and log final value into Thingsboard log file. " +
                 "Message payload can be accessed via <code>msg</code> property. For example <code>'temperature = ' + msg.temperature ;</code>" +
                 "Message metadata can be accessed via <code>metadata</code> property. For example <code>'name = ' + metadata.customerName;</code>",
         uiResources = {"static/rulenode/rulenode-core-config.js"},
diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/debug/TbMsgGeneratorNode.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/debug/TbMsgGeneratorNode.java
index f8bdc0394c..9ad08c1036 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/debug/TbMsgGeneratorNode.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/debug/TbMsgGeneratorNode.java
@@ -38,7 +38,7 @@ import static org.thingsboard.rule.engine.api.TbRelationTypes.SUCCESS;
         name = "generator",
         configClazz = TbMsgGeneratorNodeConfiguration.class,
         nodeDescription = "Periodically generates messages",
-        nodeDetails = "Generates messages with configurable period. ",
+        nodeDetails = "Generates messages with configurable period. Javascript function used fore message generation.",
         inEnabled = false,
         uiResources = {"static/rulenode/rulenode-core-config.js", "static/rulenode/rulenode-core-config.css"},
         configDirective = "tbActionNodeGeneratorConfig",
diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/metadata/TbEntityGetAttrNode.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/metadata/TbEntityGetAttrNode.java
index 480e9ebb72..82805eb339 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/metadata/TbEntityGetAttrNode.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/metadata/TbEntityGetAttrNode.java
@@ -1,12 +1,12 @@
 /**
  * Copyright © 2016-2018 The Thingsboard Authors
- * <p>
+ *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * <p>
- * http://www.apache.org/licenses/LICENSE-2.0
- * <p>
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbAbstractTransformNode.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbAbstractTransformNode.java
index 3bd72e1439..74579a8e01 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbAbstractTransformNode.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbAbstractTransformNode.java
@@ -1,12 +1,12 @@
 /**
  * Copyright © 2016-2018 The Thingsboard Authors
- * <p>
+ *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * <p>
- * http://www.apache.org/licenses/LICENSE-2.0
- * <p>
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbChangeOriginatorNode.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbChangeOriginatorNode.java
index ca0e8e22ed..220d871cf0 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbChangeOriginatorNode.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbChangeOriginatorNode.java
@@ -1,12 +1,12 @@
 /**
  * Copyright © 2016-2018 The Thingsboard Authors
- * <p>
+ *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * <p>
- * http://www.apache.org/licenses/LICENSE-2.0
- * <p>
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbTransformMsgNode.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbTransformMsgNode.java
index bf0c9feada..6edea6bb1b 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbTransformMsgNode.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbTransformMsgNode.java
@@ -26,7 +26,7 @@ import org.thingsboard.server.common.msg.TbMsg;
         name = "script",
         configClazz = TbTransformMsgNodeConfiguration.class,
         nodeDescription = "Change Message payload, Metadata or Message type using JavaScript",
-        nodeDetails = "JavaScript function receive 3 input parameters.<br/> " +
+        nodeDetails = "JavaScript function receive 3 input parameters <br/> " +
                 "<code>metadata</code> - is a Message metadata.<br/>" +
                 "<code>msg</code> - is a Message payload.<br/>" +
                 "<code>msgType</code> - is a Message type.<br/>" +
diff --git a/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/metadata/TbGetCustomerAttributeNodeTest.java b/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/metadata/TbGetCustomerAttributeNodeTest.java
index 555a3c35d6..997b68413a 100644
--- a/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/metadata/TbGetCustomerAttributeNodeTest.java
+++ b/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/metadata/TbGetCustomerAttributeNodeTest.java
@@ -1,12 +1,12 @@
 /**
  * Copyright © 2016-2018 The Thingsboard Authors
- * <p>
+ *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * <p>
- * http://www.apache.org/licenses/LICENSE-2.0
- * <p>
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.