diff --git a/redisson/src/main/java/org/redisson/RedissonExecutorService.java b/redisson/src/main/java/org/redisson/RedissonExecutorService.java
index 6a4f95e72..4812f1dbe 100644
--- a/redisson/src/main/java/org/redisson/RedissonExecutorService.java
+++ b/redisson/src/main/java/org/redisson/RedissonExecutorService.java
@@ -18,7 +18,6 @@ package org.redisson;
 import java.io.DataInputStream;
 import java.io.IOException;
 import java.io.InputStream;
-import java.io.Serializable;
 import java.lang.reflect.Field;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -37,11 +36,8 @@ import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
 import java.util.concurrent.atomic.AtomicReference;
 
-import org.redisson.api.RAtomicLong;
-import org.redisson.api.RBucket;
 import org.redisson.api.RExecutorService;
 import org.redisson.api.RFuture;
-import org.redisson.api.RKeys;
 import org.redisson.api.RTopic;
 import org.redisson.api.RemoteInvocationOptions;
 import org.redisson.api.annotation.RInject;
@@ -76,10 +72,9 @@ public class RedissonExecutorService implements RExecutorService {
     private final Codec codec;
     private final Redisson redisson;
     
-    private final RAtomicLong tasksCounter;
-    private final RBucket<Integer> status;
+    private final String tasksCounterName;
+    private final String statusName;
     private final RTopic<Integer> topic;
-    private final RKeys keys;
 
     private final RemoteExecutorServiceAsync asyncService;
     private final RemoteExecutorServiceAsync asyncServiceWithoutResult;
@@ -99,14 +94,13 @@ public class RedissonExecutorService implements RExecutorService {
         
         requestQueueName = "{" + name + ":"+ RemoteExecutorService.class.getName() + "}";
         String objectName = requestQueueName;
-        tasksCounter = redisson.getAtomicLong(objectName + ":counter");
-        status = redisson.getBucket(objectName + ":status", codec);
+        tasksCounterName = objectName + ":counter";
+        statusName = objectName + ":status";
         topic = redisson.getTopic(objectName + ":topic", codec);
-        keys = redisson.getKeys();
         
         ExecutorRemoteService remoteService = new ExecutorRemoteService(codec, redisson, name, commandExecutor);
-        remoteService.setTasksCounterName(tasksCounter.getName());
-        remoteService.setStatusName(status.getName());
+        remoteService.setTasksCounterName(tasksCounterName);
+        remoteService.setStatusName(statusName);
         
         asyncService = remoteService.get(RemoteExecutorServiceAsync.class, RemoteInvocationOptions.defaults().noAck().expectResultWithin(Integer.MAX_VALUE * 2));
         asyncServiceWithoutResult = remoteService.get(RemoteExecutorServiceAsync.class, RemoteInvocationOptions.defaults().noAck().noResult());
@@ -120,8 +114,8 @@ public class RedissonExecutorService implements RExecutorService {
     @Override
     public void registerWorkers(int executors, ExecutorService executor) {
         RemoteExecutorServiceImpl service = new RemoteExecutorServiceImpl(commandExecutor, redisson, codec, requestQueueName);
-        service.setStatusName(status.getName());
-        service.setTasksCounterName(tasksCounter.getName());
+        service.setStatusName(statusName);
+        service.setTasksCounterName(tasksCounterName);
         service.setTopicName(topic.getChannelNames().get(0));
         
         redisson.getRemoteSerivce(name, codec).register(RemoteExecutorService.class, service, executors, executor);
@@ -190,7 +184,7 @@ public class RedissonExecutorService implements RExecutorService {
                         + "redis.call('set', KEYS[2], ARGV[1]);"
                      + "end;"
                 + "end;", 
-                Arrays.<Object>asList(tasksCounter.getName(), status.getName(), topic.getChannelNames().get(0)),
+                Arrays.<Object>asList(tasksCounterName, statusName, topic.getChannelNames().get(0)),
                 SHUTDOWN_STATE, TERMINATED_STATE);
     }
 
@@ -207,7 +201,7 @@ public class RedissonExecutorService implements RExecutorService {
     @Override
     public RFuture<Boolean> deleteAsync() {
         final RPromise<Boolean> result = connectionManager.newPromise();
-        RFuture<Long> deleteFuture = keys.deleteAsync(requestQueueName, status.getName(), tasksCounter.getName());
+        RFuture<Long> deleteFuture = redisson.getKeys().deleteAsync(requestQueueName, statusName, tasksCounterName);
         deleteFuture.addListener(new FutureListener<Long>() {
             @Override
             public void operationComplete(io.netty.util.concurrent.Future<Long> future) throws Exception {
@@ -229,12 +223,22 @@ public class RedissonExecutorService implements RExecutorService {
 
     @Override
     public boolean isShutdown() {
-        return status.isExists() && status.get() >= SHUTDOWN_STATE;
+        return checkState(SHUTDOWN_STATE);
+    }
+
+    private boolean checkState(int state) {
+        return commandExecutor.evalWrite(getName(), codec, RedisCommands.EVAL_BOOLEAN_WITH_VALUES,
+                "if redis.call('exists', KEYS[1]) == 1 and tonumber(redis.call('get', KEYS[1])) >= tonumber(ARGV[1]) then "
+                + "return 1;"
+            + "end;"
+            + "return 0;", 
+                Arrays.<Object>asList(statusName),
+                SHUTDOWN_STATE);
     }
 
     @Override
     public boolean isTerminated() {
-        return status.isExists() && status.get() == TERMINATED_STATE;
+        return checkState(TERMINATED_STATE);
     }
 
     @Override
@@ -302,9 +306,6 @@ public class RedissonExecutorService implements RExecutorService {
         if (task.getClass().isAnonymousClass()) {
             throw new IllegalArgumentException("Task can't be created using anonymous class");
         }
-        if (!Serializable.class.isAssignableFrom(task.getClass())) {
-            throw new IllegalArgumentException("Task class should implement Serializable interface");
-        }
     }
 
     private <T> void execute(RemotePromise<T> promise) {
diff --git a/redisson/src/test/java/org/redisson/executor/CallableTask.java b/redisson/src/test/java/org/redisson/executor/CallableTask.java
index e230d4edd..d0c25ce42 100644
--- a/redisson/src/test/java/org/redisson/executor/CallableTask.java
+++ b/redisson/src/test/java/org/redisson/executor/CallableTask.java
@@ -3,7 +3,7 @@ package org.redisson.executor;
 import java.io.Serializable;
 import java.util.concurrent.Callable;
 
-public class CallableTask implements Callable<String>, Serializable {
+public class CallableTask implements Callable<String> {
 
     public static final String RESULT = "callable";
     
diff --git a/redisson/src/test/java/org/redisson/executor/RunnableTask.java b/redisson/src/test/java/org/redisson/executor/RunnableTask.java
index 773da2372..5ebbf0a49 100644
--- a/redisson/src/test/java/org/redisson/executor/RunnableTask.java
+++ b/redisson/src/test/java/org/redisson/executor/RunnableTask.java
@@ -2,7 +2,7 @@ package org.redisson.executor;
 
 import java.io.Serializable;
 
-public class RunnableTask implements Runnable, Serializable {
+public class RunnableTask implements Runnable {
 
     private static final long serialVersionUID = 2105094575950438867L;
     
diff --git a/redisson/src/test/java/org/redisson/executor/RunnableTask2.java b/redisson/src/test/java/org/redisson/executor/RunnableTask2.java
index 16a692161..ceb0eb444 100644
--- a/redisson/src/test/java/org/redisson/executor/RunnableTask2.java
+++ b/redisson/src/test/java/org/redisson/executor/RunnableTask2.java
@@ -2,7 +2,7 @@ package org.redisson.executor;
 
 import java.io.Serializable;
 
-public class RunnableTask2 implements Runnable, Serializable {
+public class RunnableTask2 implements Runnable {
 
     private static final long serialVersionUID = 2105094575950438867L;