diff --git a/naming/src/main/java/com/alibaba/nacos/naming/controllers/ServiceController.java b/naming/src/main/java/com/alibaba/nacos/naming/controllers/ServiceController.java
index d4bec7771..878d2a405 100644
--- a/naming/src/main/java/com/alibaba/nacos/naming/controllers/ServiceController.java
+++ b/naming/src/main/java/com/alibaba/nacos/naming/controllers/ServiceController.java
@@ -31,6 +31,7 @@ import com.alibaba.nacos.naming.misc.UtilsAndCommons;
 import com.alibaba.nacos.naming.selector.LabelSelector;
 import com.alibaba.nacos.naming.selector.NoneSelector;
 import com.alibaba.nacos.naming.selector.Selector;
+import org.apache.commons.io.IOUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.commons.lang3.math.NumberUtils;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -39,6 +40,7 @@ import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.RestController;
 
 import javax.servlet.http.HttpServletRequest;
+import java.io.IOException;
 import java.net.URLDecoder;
 import java.util.*;
 
@@ -299,10 +301,15 @@ public class ServiceController {
     }
 
     @RequestMapping(value = "/status", method = RequestMethod.POST)
-    public String serviceStatus(HttpServletRequest request) {
+    public String serviceStatus(HttpServletRequest request) throws IOException {
+
+        String entity = IOUtils.toString(request.getInputStream(), "UTF-8");
+        String value = URLDecoder.decode(entity, "UTF-8");
+        JSONObject json = JSON.parseObject(value);
+
         //format: service1@@checksum@@@service2@@checksum
-        String statuses = WebUtils.required(request, "statuses");
-        String serverIP = WebUtils.optional(request, "clientIP", "");
+        String statuses = json.getString("statuses");
+        String serverIP = json.getString("clientIP");
 
         if (!serverListManager.contains(serverIP)) {
             throw new IllegalArgumentException("ip: " + serverIP + " is not in serverlist");
diff --git a/naming/src/main/java/com/alibaba/nacos/naming/core/Instances.java b/naming/src/main/java/com/alibaba/nacos/naming/core/Instances.java
index 57752790e..933a7ea88 100644
--- a/naming/src/main/java/com/alibaba/nacos/naming/core/Instances.java
+++ b/naming/src/main/java/com/alibaba/nacos/naming/core/Instances.java
@@ -25,6 +25,7 @@ import java.math.BigInteger;
 import java.nio.charset.Charset;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
@@ -40,7 +41,7 @@ public class Instances implements Record {
 
     private long lastCalculateTime = 0L;
 
-    private List<Instance> instanceList;
+    private List<Instance> instanceList = new ArrayList<>();
 
     public List<Instance> getInstanceList() {
         return instanceList;
diff --git a/naming/src/main/java/com/alibaba/nacos/naming/misc/ServiceStatusSynchronizer.java b/naming/src/main/java/com/alibaba/nacos/naming/misc/ServiceStatusSynchronizer.java
index 4cfa285fc..8c6ddc8c9 100644
--- a/naming/src/main/java/com/alibaba/nacos/naming/misc/ServiceStatusSynchronizer.java
+++ b/naming/src/main/java/com/alibaba/nacos/naming/misc/ServiceStatusSynchronizer.java
@@ -15,6 +15,7 @@
  */
 package com.alibaba.nacos.naming.misc;
 
+import com.alibaba.fastjson.JSON;
 import com.alibaba.nacos.naming.boot.RunningConfig;
 import com.ning.http.client.AsyncCompletionHandler;
 import com.ning.http.client.Response;
@@ -49,7 +50,7 @@ public class ServiceStatusSynchronizer implements Synchronizer {
         }
 
         try {
-            HttpClient.asyncHttpPost(url, null, params, new AsyncCompletionHandler() {
+            HttpClient.asyncHttpPostLarge(url, null, JSON.toJSONString(params), new AsyncCompletionHandler() {
                 @Override
                 public Integer onCompleted(Response response) throws Exception {
                     if (response.getStatusCode() != HttpURLConnection.HTTP_OK) {