diff --git a/remoting-core/rpc-api/src/main/java/org/apache/rocketmq/rpc/api/AdvancedClient.java b/remoting-core/rpc-api/src/main/java/org/apache/rocketmq/rpc/api/AdvancedClient.java
index 881dc68b76f8320b5917c2fe0d63586bb73e3ab4..d2627cd0239d0fc2673988b89781e27c1e313547 100644
--- a/remoting-core/rpc-api/src/main/java/org/apache/rocketmq/rpc/api/AdvancedClient.java
+++ b/remoting-core/rpc-api/src/main/java/org/apache/rocketmq/rpc/api/AdvancedClient.java
@@ -17,19 +17,19 @@
 package org.apache.rocketmq.rpc.api;
 
 public interface AdvancedClient {
-    <T> T callSync(String address,
+    <T> T callSync(final String address,
         final String serviceCode,
         final String version,
         final Object[] parameter,
         final Class<T> responseType) throws Exception;
 
-    <T> Promise<T> callAsync(String address,
+    <T> Promise<T> callAsync(final String address,
         final String serviceCode,
         final String version,
         final Object[] parameter,
         final Class<T> responseType) throws Exception;
 
-    void callOneway(String address,
+    void callOneway(final String address,
         final String serviceCode,
         final String version,
         final Object[] parameter) throws Exception;
diff --git a/remoting-core/rpc-api/src/main/java/org/apache/rocketmq/rpc/api/SimpleClient.java b/remoting-core/rpc-api/src/main/java/org/apache/rocketmq/rpc/api/SimpleClient.java
index ece1f605469353b5f0565d37e5479e58c6e24633..ce5dffa39b2fa1cbd6ba3e28b86eb533f52be29d 100644
--- a/remoting-core/rpc-api/src/main/java/org/apache/rocketmq/rpc/api/SimpleClient.java
+++ b/remoting-core/rpc-api/src/main/java/org/apache/rocketmq/rpc/api/SimpleClient.java
@@ -22,11 +22,11 @@ import java.util.concurrent.ExecutorService;
 import org.apache.rocketmq.remoting.api.ObjectLifecycle;
 
 public interface SimpleClient extends ObjectLifecycle {
-    <T> T bind(Class<T> service, String address, Properties properties); //keyValue
+    <T> T bind(final Class<T> service, final String address, final Properties properties);
 
-    void publish(Object service);
+    void publish(final Object service);
 
-    void publish(Object service, ExecutorService executorService);
+    void publish(final Object service, final ExecutorService executorService);
 
     AdvancedClient advancedClient();
 }
diff --git a/remoting-core/rpc-api/src/main/java/org/apache/rocketmq/rpc/api/SimpleServer.java b/remoting-core/rpc-api/src/main/java/org/apache/rocketmq/rpc/api/SimpleServer.java
index 4bf537245d9f6e4e19943b3ef0881ce717b36b6b..5f67fe6e535b6e9ab2fd8f7c3ff2e6db704c9f3b 100644
--- a/remoting-core/rpc-api/src/main/java/org/apache/rocketmq/rpc/api/SimpleServer.java
+++ b/remoting-core/rpc-api/src/main/java/org/apache/rocketmq/rpc/api/SimpleServer.java
@@ -25,9 +25,9 @@ import org.apache.rocketmq.remoting.api.channel.RemotingChannel;
 public interface SimpleServer extends ObjectLifecycle {
     <T> T bind(final Class<T> service, final RemotingChannel channel, final Properties properties);
 
-    AdvancedServer advancedServer();
-
     void publish(final Object service);
 
-    void publish(Object service, ExecutorService executorService);
+    void publish(final Object service, final ExecutorService executorService);
+
+    AdvancedServer advancedServer();
 }
diff --git a/remoting-core/rpc-impl/src/main/java/org/apache/rocketmq/rpc/impl/command/ResponseCode.java b/remoting-core/rpc-impl/src/main/java/org/apache/rocketmq/rpc/impl/command/ResponseCode.java
index 270adaa159dc818dd5fa267303375007a228a6b7..217feb6ae11db460548aa7e0afb2be93860cfe97 100644
--- a/remoting-core/rpc-impl/src/main/java/org/apache/rocketmq/rpc/impl/command/ResponseCode.java
+++ b/remoting-core/rpc-impl/src/main/java/org/apache/rocketmq/rpc/impl/command/ResponseCode.java
@@ -41,26 +41,8 @@ public class ResponseCode {
     public static final String USER_EXCEPTION_CLASS_NOT_FOUND = "401";
     public static final String USER_EXCEPTION_METHOD_NOT_FOUND = "402";
 
-    public static final String PROVIDER_OFF_LINE = "501";
-    public static final String CONSUMER_OFF_LINE = "502";
-    public static final String PROVIDER_NOT_EXIST = "503";
-    public static final String CONSUMER_NOT_EXIST = "504";
-    public static final String NAMESPACE_NOT_EXIST = "505";
-    public static final String CLIENT_NOT_REGISTERED = "506";
-    public static final String NO_SERVICE_ON_LINE = "507";
-    public static final String NO_SERVICE_ON_THIS_SERVER = "508";
-    public static final String SERVICE_ALREADY_ONLINE = "509";
-    public static final String SERVER_NOT_EXIST = "510";
-    public static final String SERVER_ALREADY_ONLINE = "511";
-    public static final String NO_SERVER_ON_LINE = "512";
-    public static final String ACCESS_DENIED = "513";
 
-    public static final String SYSTEM_ERROR = "600";
-    public static final String SYSTEM_BUSY = "601";
-    public static final String BAD_REQUEST = "602";
     public static final String PARAMETER_ERROR = "603";
-    public static final String SEND_REQUEST_FAILED = "604";
-    public static final String REQUEST_TIMEOUT = "605";
     public static final String UNKNOWN_EXCEPTION = "606";
 
     @Override
@@ -78,25 +60,8 @@ public class ResponseCode {
         R_400(400, "User service happened"),
         R_401(401, "Class not found"),
         R_402(402, "Method not found"),
-        R_501(501, "Service provider offline "),
-        R_502(502, "Service consumer offline"),
-        R_503(503, "Service provider not exist"),
-        R_504(504, "Service consumer not exist"),
-        R_505(505, "Namespace not exist"),
-        R_506(506, "Client not registered"),
-        R_507(507, "No service online"),
-        R_508(508, "No service on this server"),
-        R_509(509, "Server already online"),
-        R_510(510, "Server not exist"),
-        R_511(511, "Server already online"),
-        R_512(512, "No server online"),
-        R_513(513, "Access denied"),
-        R_600(600, "System error"),
-        R_601(601, "System busy"),
-        R_602(602, "Bad request"),
+
         R_603(603, "Parameter error"),
-        R_604(604, "Send request failed"),
-        R_605(605, "Request timeout"),
         R_606(606, "unknown exception");
 
         private int responseCode = 0;