diff --git a/src/main/java/org/redisson/CommandExecutor.java b/src/main/java/org/redisson/CommandExecutor.java
index 58baf6a37..5d63b7447 100644
--- a/src/main/java/org/redisson/CommandExecutor.java
+++ b/src/main/java/org/redisson/CommandExecutor.java
@@ -73,7 +73,7 @@ public interface CommandExecutor {
 
     <T, R> Future<Queue<R>> readAllAsync(RedisCommand<T> command, Object ... params);
 
-    <T> Future<Boolean> writeAllAsync(RedisCommand<T> command, Object ... params);
+    <T> Future<Void> writeAllAsync(RedisCommand<T> command, Object ... params);
 
     <T, R> Future<R> writeAsync(String key, RedisCommand<T> command, Object ... params);
 
diff --git a/src/main/java/org/redisson/CommandExecutorService.java b/src/main/java/org/redisson/CommandExecutorService.java
index 6e8d73f25..3af0cd170 100644
--- a/src/main/java/org/redisson/CommandExecutorService.java
+++ b/src/main/java/org/redisson/CommandExecutorService.java
@@ -99,34 +99,8 @@ public class CommandExecutorService implements CommandExecutor {
         return mainPromise;
     }
 
-    public <T> Future<Boolean> writeAllAsync(RedisCommand<T> command, Object ... params) {
-        return allAsync(false, command, params);
-    }
-
-    public <T> Future<Boolean> allAsync(boolean readOnlyMode, RedisCommand<T> command, Object ... params) {
-        final Promise<Boolean> mainPromise = connectionManager.newPromise();
-        Promise<Object> promise = new DefaultPromise<Object>() {
-            AtomicInteger counter = new AtomicInteger(connectionManager.getEntries().keySet().size());
-            @Override
-            public Promise<Object> setSuccess(Object result) {
-                if (counter.decrementAndGet() == 0
-                      && !mainPromise.isDone()) {
-                    mainPromise.setSuccess(true);
-                }
-                return this;
-            }
-
-            @Override
-            public Promise<Object> setFailure(Throwable cause) {
-                mainPromise.setFailure(cause);
-                return this;
-            }
-
-        };
-        for (Integer slot : connectionManager.getEntries().keySet()) {
-            async(readOnlyMode, slot, null, connectionManager.getCodec(), command, params, promise, 0);
-        }
-        return mainPromise;
+    public <T> Future<Void> writeAllAsync(RedisCommand<T> command, Object ... params) {
+        return writeAllAsync(command, null, params);
     }
 
     public <R, T> Future<R> writeAllAsync(RedisCommand<T> command, SlotCallback<T, R> callback, Object ... params) {
@@ -139,10 +113,15 @@ public class CommandExecutorService implements CommandExecutor {
             AtomicInteger counter = new AtomicInteger(connectionManager.getEntries().keySet().size());
             @Override
             public Promise<T> setSuccess(T result) {
-                callback.onSlotResult(result);
-                if (counter.decrementAndGet() == 0
-                      && !mainPromise.isDone()) {
-                    mainPromise.setSuccess(callback.onFinish());
+                if (callback != null) {
+                    callback.onSlotResult(result);
+                }
+                if (counter.decrementAndGet() == 0) {
+                    if (callback != null) {
+                        mainPromise.setSuccess(callback.onFinish());
+                    } else {
+                        mainPromise.setSuccess(null);
+                    }
                 }
                 return this;
             }
diff --git a/src/main/java/org/redisson/RedissonScript.java b/src/main/java/org/redisson/RedissonScript.java
index 324dd5b74..7ad1d95b0 100644
--- a/src/main/java/org/redisson/RedissonScript.java
+++ b/src/main/java/org/redisson/RedissonScript.java
@@ -34,7 +34,7 @@ public class RedissonScript implements RScript {
 
     @Override
     public String scriptLoad(String luaScript) {
-        return scriptLoad(null, luaScript);
+        return commandExecutor.get(scriptLoadAsync(luaScript));
     }
 
     @Override
@@ -43,7 +43,18 @@ public class RedissonScript implements RScript {
     }
 
     public Future<String> scriptLoadAsync(String luaScript) {
-        return scriptLoadAsync(null, luaScript);
+        return commandExecutor.writeAllAsync(RedisCommands.SCRIPT_LOAD, new SlotCallback<String, String>() {
+            volatile String result;
+            @Override
+            public void onSlotResult(String result) {
+                this.result = result;
+            }
+
+            @Override
+            public String onFinish() {
+                return result;
+            }
+        }, luaScript);
     }
 
     @Override
@@ -119,22 +130,22 @@ public class RedissonScript implements RScript {
     }
 
     @Override
-    public boolean scriptKill() {
-        return commandExecutor.get(scriptKillAsync());
+    public void scriptKill() {
+        commandExecutor.get(scriptKillAsync());
     }
 
     @Override
-    public boolean scriptKill(String key) {
-        return commandExecutor.get(scriptKillAsync(key));
+    public void scriptKill(String key) {
+        commandExecutor.get(scriptKillAsync(key));
     }
 
     @Override
-    public Future<Boolean> scriptKillAsync() {
+    public Future<Void> scriptKillAsync() {
         return commandExecutor.writeAllAsync(RedisCommands.SCRIPT_KILL);
     }
 
     @Override
-    public Future<Boolean> scriptKillAsync(String key) {
+    public Future<Void> scriptKillAsync(String key) {
         return commandExecutor.writeAsync(key, RedisCommands.SCRIPT_KILL);
     }
 
@@ -149,22 +160,22 @@ public class RedissonScript implements RScript {
     }
 
     @Override
-    public boolean scriptFlush() {
-        return commandExecutor.get(scriptFlushAsync());
+    public void scriptFlush() {
+        commandExecutor.get(scriptFlushAsync());
     }
 
     @Override
-    public boolean scriptFlush(String key) {
-        return commandExecutor.get(scriptFlushAsync(key));
+    public void scriptFlush(String key) {
+        commandExecutor.get(scriptFlushAsync(key));
     }
 
     @Override
-    public Future<Boolean> scriptFlushAsync() {
+    public Future<Void> scriptFlushAsync() {
         return commandExecutor.writeAllAsync(RedisCommands.SCRIPT_FLUSH);
     }
 
     @Override
-    public Future<Boolean> scriptFlushAsync(String key) {
+    public Future<Void> scriptFlushAsync(String key) {
         return commandExecutor.writeAsync(key, RedisCommands.SCRIPT_FLUSH);
     }
 
diff --git a/src/main/java/org/redisson/core/RScript.java b/src/main/java/org/redisson/core/RScript.java
index 646cae5ae..35e3484a3 100644
--- a/src/main/java/org/redisson/core/RScript.java
+++ b/src/main/java/org/redisson/core/RScript.java
@@ -55,15 +55,15 @@ public interface RScript extends RScriptAsync {
 
     String scriptLoad(String luaScript);
 
-    boolean scriptKill();
+    void scriptKill();
 
     List<Boolean> scriptExists(String key, String ... shaDigests);
 
-    boolean scriptFlush();
+    void scriptFlush();
 
-    boolean scriptFlush(String key);
+    void scriptFlush(String key);
 
-    boolean scriptKill(String key);
+    void scriptKill(String key);
 
     String scriptLoad(String key, String luaScript);
 
diff --git a/src/main/java/org/redisson/core/RScriptAsync.java b/src/main/java/org/redisson/core/RScriptAsync.java
index f1b6e9f82..67ee7be4c 100644
--- a/src/main/java/org/redisson/core/RScriptAsync.java
+++ b/src/main/java/org/redisson/core/RScriptAsync.java
@@ -24,7 +24,7 @@ import io.netty.util.concurrent.Future;
 
 public interface RScriptAsync {
 
-    Future<Boolean> scriptFlushAsync();
+    Future<Void> scriptFlushAsync();
 
     <R> Future<R> evalShaAsync(Mode mode, String shaDigest, ReturnType returnType, List<Object> keys, Object... values);
 
@@ -32,13 +32,13 @@ public interface RScriptAsync {
 
     Future<String> scriptLoadAsync(String luaScript);
 
-    Future<Boolean> scriptKillAsync();
+    Future<Void> scriptKillAsync();
 
     Future<List<Boolean>> scriptExistsAsync(String key, String ... shaDigests);
 
-    Future<Boolean> scriptFlushAsync(String key);
+    Future<Void> scriptFlushAsync(String key);
 
-    Future<Boolean> scriptKillAsync(String key);
+    Future<Void> scriptKillAsync(String key);
 
     Future<String> scriptLoadAsync(String key, String luaScript);
 
diff --git a/src/test/java/org/redisson/RedissonScriptTest.java b/src/test/java/org/redisson/RedissonScriptTest.java
index 0bb39c3e6..a79139f8f 100644
--- a/src/test/java/org/redisson/RedissonScriptTest.java
+++ b/src/test/java/org/redisson/RedissonScriptTest.java
@@ -53,8 +53,8 @@ public class RedissonScriptTest extends BaseTest {
         Assert.assertEquals("282297a0228f48cd3fc6a55de6316f31422f5d17", r);
         String r1 = redisson.getScript().evalSha(Mode.READ_ONLY, "282297a0228f48cd3fc6a55de6316f31422f5d17", RScript.ReturnType.VALUE, Collections.emptyList());
         Assert.assertEquals("bar", r1);
-        Boolean r2 = redisson.getScript().scriptFlush();
-        Assert.assertTrue(r2);
+        redisson.getScript().scriptFlush();
+
         try {
             redisson.getScript().evalSha(Mode.READ_ONLY, "282297a0228f48cd3fc6a55de6316f31422f5d17", RScript.ReturnType.VALUE, Collections.emptyList());
         } catch (Exception e) {
@@ -82,15 +82,21 @@ public class RedissonScriptTest extends BaseTest {
 
     @Test
     public void testEvalSha() {
+        RScript s = redisson.getScript();
+        String res = s.scriptLoad(null, "return redis.call('get', 'foo')");
+        Assert.assertEquals("282297a0228f48cd3fc6a55de6316f31422f5d17", res);
+
         redisson.getBucket("foo").set("bar");
-        String r = redisson.getScript().eval(Mode.READ_ONLY, "return redis.call('get', 'foo')", RScript.ReturnType.VALUE);
-        Assert.assertEquals("bar", r);
-        String r1 = redisson.getScript().evalSha(Mode.READ_ONLY, "282297a0228f48cd3fc6a55de6316f31422f5d17", RScript.ReturnType.VALUE, Collections.emptyList());
+        String r1 = s.evalSha(Mode.READ_ONLY, "282297a0228f48cd3fc6a55de6316f31422f5d17", RScript.ReturnType.VALUE, Collections.emptyList());
         Assert.assertEquals("bar", r1);
     }
 
     @Test
     public void testEvalshaAsync() {
+        RScript s = redisson.getScript();
+        String res = s.scriptLoad(null, "return redis.call('get', 'foo')");
+        Assert.assertEquals("282297a0228f48cd3fc6a55de6316f31422f5d17", res);
+
         redisson.getBucket("foo").set("bar");
         String r = redisson.getScript().eval(Mode.READ_ONLY, "return redis.call('get', 'foo')", RScript.ReturnType.VALUE);
         Assert.assertEquals("bar", r);