diff --git a/README.md b/README.md
index bc89ec5..f39915d 100644
--- a/README.md
+++ b/README.md
@@ -7,9 +7,7 @@
 
 1.先安装并开启zookeeper
 
-[windows 环境下zookeeper的安装与配置]: https://blog.csdn.net/fisherish/article/details/118974827?spm=1001.2014.3001.5506
-
-
+安装参考：https://blog.csdn.net/fisherish/article/details/118974827?spm=1001.2014.3001.5506
 
 2.运行Server包下的TestServer,再运行Client包下的TestClient
 
diff --git a/version4/src/main/java/part1/Client/TestClient.java b/version4/src/main/java/part1/Client/TestClient.java
index 705f383..f622d11 100644
--- a/version4/src/main/java/part1/Client/TestClient.java
+++ b/version4/src/main/java/part1/Client/TestClient.java
@@ -16,12 +16,27 @@ public class TestClient {
     public static void main(String[] args) throws InterruptedException {
         ClientProxy clientProxy=new ClientProxy();
         UserService proxy=clientProxy.getProxy(UserService.class);
+        for(int i = 0; i < 15; i++) {
+            Integer i1 = i;
+            new Thread(()->{
+                try{
+                    User user = proxy.getUserByUserId(i1);
 
-        User user = proxy.getUserByUserId(1);
-        System.out.println("从服务端得到的user="+user.toString());
+                    System.out.println("从服务端得到的user="+user.toString());
 
-        User u=User.builder().id(100).userName("wxx").sex(true).build();
-        Integer id = proxy.insertUserId(u);
-        System.out.println("向服务端插入user的id"+id);
+                    Integer id = proxy.insertUserId(User.builder().id(i1).userName("User" + i1.toString()).sex(true).build());
+                    System.out.println("向服务端插入user的id"+id);
+                } catch (NullPointerException e){
+                    System.out.println("user为空");
+                    e.printStackTrace();
+                }
+            }).start();
+        }
     }
+    //User user = proxy.getUserByUserId(1);
+    //System.out.println("从服务端得到的user="+user.toString());
+    //
+    //User u=User.builder().id(100).userName("wxx").sex(true).build();
+    //Integer id = proxy.insertUserId(u);
+    //System.out.println("向服务端插入user的id"+id);
 }
diff --git a/version4/src/main/java/part1/Server/netty/handler/NettyRPCServerHandler.java b/version4/src/main/java/part1/Server/netty/handler/NettyRPCServerHandler.java
index db474d0..7b8824f 100644
--- a/version4/src/main/java/part1/Server/netty/handler/NettyRPCServerHandler.java
+++ b/version4/src/main/java/part1/Server/netty/handler/NettyRPCServerHandler.java
@@ -39,6 +39,7 @@ public class NettyRPCServerHandler extends SimpleChannelInboundHandler<RpcReques
         RateLimit rateLimit=serviceProvider.getRateLimitProvider().getRateLimit(interfaceName);
         if(!rateLimit.getToken()){
             //如果获取令牌失败，进行限流降级，快速返回结果
+            System.out.println("服务限流！！");
             return RpcResponse.fail();
         }
 
diff --git a/version4/src/main/java/part1/common/serializer/myCode/MyDecoder.java b/version4/src/main/java/part1/common/serializer/myCode/MyDecoder.java
index 78ed394..7842dd4 100644
--- a/version4/src/main/java/part1/common/serializer/myCode/MyDecoder.java
+++ b/version4/src/main/java/part1/common/serializer/myCode/MyDecoder.java
@@ -4,6 +4,7 @@ import io.netty.buffer.ByteBuf;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.handler.codec.ByteToMessageDecoder;
 import part1.common.Message.MessageType;
+import part1.common.Message.RpcResponse;
 import part1.common.serializer.mySerializer.Serializer;
 
 import java.util.List;
@@ -35,7 +36,9 @@ public class MyDecoder extends ByteToMessageDecoder {
         //4.读取序列化数组
         byte[] bytes=new byte[length];
         in.readBytes(bytes);
+        System.out.println("bytes==="+new String(bytes));
         Object deserialize= serializer.deserialize(bytes, messageType);
+
         out.add(deserialize);
     }
 }
diff --git a/version4/src/main/java/part1/common/serializer/mySerializer/JsonSerializer.java b/version4/src/main/java/part1/common/serializer/mySerializer/JsonSerializer.java
index 39240cf..f980367 100644
--- a/version4/src/main/java/part1/common/serializer/mySerializer/JsonSerializer.java
+++ b/version4/src/main/java/part1/common/serializer/mySerializer/JsonSerializer.java
@@ -43,9 +43,14 @@ public class JsonSerializer implements Serializer {
                 break;
             case 1:
                 RpcResponse response = JSON.parseObject(bytes, RpcResponse.class);
+                // 如果类型为空，说明返回错误
+                if(response.getDataType()==null){
+                    obj = RpcResponse.fail();
+                    break;
+                }
                 Class<?> dataType = response.getDataType();
                 //判断转化后的response对象中的data的类型是否正确
-                if(! dataType.isAssignableFrom(response.getData().getClass())){
+                if(!dataType.isAssignableFrom(response.getData().getClass())){
                     response.setData(JSONObject.toJavaObject((JSONObject) response.getData(),dataType));
                 }
                 obj = response;