diff --git a/client/src/main/java/com/alibaba/nacos/client/config/NacosConfigService.java b/client/src/main/java/com/alibaba/nacos/client/config/NacosConfigService.java
index ff3da8855..4c5a82e38 100644
--- a/client/src/main/java/com/alibaba/nacos/client/config/NacosConfigService.java
+++ b/client/src/main/java/com/alibaba/nacos/client/config/NacosConfigService.java
@@ -56,8 +56,6 @@ public class NacosConfigService implements ConfigService {
 
     private static final long POST_TIMEOUT = 3000L;
 
-    private static final String EMPTY = "";
-
     /**
      * http agent
      */
diff --git a/client/src/main/java/com/alibaba/nacos/client/config/http/MetricsHttpAgent.java b/client/src/main/java/com/alibaba/nacos/client/config/http/MetricsHttpAgent.java
index 21b6654bd..2449c4131 100644
--- a/client/src/main/java/com/alibaba/nacos/client/config/http/MetricsHttpAgent.java
+++ b/client/src/main/java/com/alibaba/nacos/client/config/http/MetricsHttpAgent.java
@@ -43,7 +43,7 @@ public class MetricsHttpAgent implements HttpAgent {
     @Override
     public HttpResult httpGet(String path, List<String> headers, List<String> paramValues, String encoding, long readTimeoutMs) throws IOException {
         Histogram.Timer timer = MetricsMonitor.getConfigRequestMonitor("GET", path, "NA");
-        HttpResult result = null;
+        HttpResult result;
         try {
             result = httpAgent.httpGet(path, headers, paramValues, encoding, readTimeoutMs);
         } catch (IOException e) {
@@ -59,7 +59,7 @@ public class MetricsHttpAgent implements HttpAgent {
     @Override
     public HttpResult httpPost(String path, List<String> headers, List<String> paramValues, String encoding, long readTimeoutMs) throws IOException {
         Histogram.Timer timer = MetricsMonitor.getConfigRequestMonitor("POST", path, "NA");
-        HttpResult result = null;
+        HttpResult result;
         try {
             result = httpAgent.httpPost(path, headers, paramValues, encoding, readTimeoutMs);
         } catch (IOException e) {
@@ -75,7 +75,7 @@ public class MetricsHttpAgent implements HttpAgent {
     @Override
     public HttpResult httpDelete(String path, List<String> headers, List<String> paramValues, String encoding, long readTimeoutMs) throws IOException {
         Histogram.Timer timer = MetricsMonitor.getConfigRequestMonitor("DELETE", path, "NA");
-        HttpResult result = null;
+        HttpResult result;
         try {
             result = httpAgent.httpDelete(path, headers, paramValues, encoding, readTimeoutMs);
         } catch (IOException e) {
diff --git a/client/src/main/java/com/alibaba/nacos/client/config/impl/AbstractConfigChangeParser.java b/client/src/main/java/com/alibaba/nacos/client/config/impl/AbstractConfigChangeParser.java
index bea9e6d52..a6457385e 100644
--- a/client/src/main/java/com/alibaba/nacos/client/config/impl/AbstractConfigChangeParser.java
+++ b/client/src/main/java/com/alibaba/nacos/client/config/impl/AbstractConfigChangeParser.java
@@ -44,7 +44,7 @@ public abstract class AbstractConfigChangeParser implements ConfigChangeParser {
         Map<String, ConfigChangeItem> result = new HashMap<String, ConfigChangeItem>(16);
         for (Iterator<Map.Entry<String, Object>> entryItr = oldMap.entrySet().iterator(); entryItr.hasNext();) {
             Map.Entry<String, Object> e = entryItr.next();
-            ConfigChangeItem cci = null;
+            ConfigChangeItem cci;
             if (newMap.containsKey(e.getKey()))  {
                 if (e.getValue().equals(newMap.get(e.getKey()))) {
                     continue;
diff --git a/client/src/main/java/com/alibaba/nacos/client/config/impl/ClientWorker.java b/client/src/main/java/com/alibaba/nacos/client/config/impl/ClientWorker.java
index 10c12d7fc..9218eb2fc 100644
--- a/client/src/main/java/com/alibaba/nacos/client/config/impl/ClientWorker.java
+++ b/client/src/main/java/com/alibaba/nacos/client/config/impl/ClientWorker.java
@@ -27,6 +27,7 @@ import com.alibaba.nacos.client.config.impl.HttpSimpleClient.HttpResult;
 import com.alibaba.nacos.client.config.utils.ContentUtils;
 import com.alibaba.nacos.common.utils.MD5Utils;
 import com.alibaba.nacos.client.monitor.MetricsMonitor;
+import com.alibaba.nacos.client.naming.utils.CollectionUtils;
 import com.alibaba.nacos.client.utils.LogUtils;
 import com.alibaba.nacos.client.utils.ParamUtil;
 import com.alibaba.nacos.client.utils.TenantUtil;
@@ -519,7 +520,10 @@ public class ClientWorker {
 
                 // check server config
                 List<String> changedGroupKeys = checkUpdateDataIds(cacheDatas, inInitializingCacheList);
-                LOGGER.info("get changedGroupKeys:" + changedGroupKeys);
+                if (!CollectionUtils.isEmpty(changedGroupKeys)) {
+                    LOGGER.info("get changedGroupKeys:" + changedGroupKeys);
+                }
+
 
                 for (String groupKey : changedGroupKeys) {
                     String[] key = GroupKey.parseKey(groupKey);
diff --git a/core/src/main/java/com/alibaba/nacos/core/code/ControllerMethodsCache.java b/core/src/main/java/com/alibaba/nacos/core/code/ControllerMethodsCache.java
index 97dc9bfca..7c4ea9d77 100644
--- a/core/src/main/java/com/alibaba/nacos/core/code/ControllerMethodsCache.java
+++ b/core/src/main/java/com/alibaba/nacos/core/code/ControllerMethodsCache.java
@@ -18,6 +18,7 @@ package com.alibaba.nacos.core.code;
 
 import org.apache.commons.lang3.ArrayUtils;
 import org.reflections.Reflections;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Component;
 import org.springframework.web.bind.annotation.*;
 
@@ -35,6 +36,9 @@ import java.util.concurrent.ConcurrentMap;
 @Component
 public class ControllerMethodsCache {
 
+    @Value("${server.servlet.contextPath:/nacos}")
+    private String contextPath;
+
     private ConcurrentMap<String, Method> methods = new
         ConcurrentHashMap<>();
 
@@ -43,7 +47,7 @@ public class ControllerMethodsCache {
     }
 
     public Method getMethod(String httpMethod, String path) {
-        String key = httpMethod + "-->" + path.replace("/nacos", "");
+        String key = httpMethod + "-->" + path.replace(contextPath, "");
         return methods.get(key);
     }
 
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 5d40e011c..323ad3a6e 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
@@ -73,7 +73,7 @@ public class ServiceStatusSynchronizer implements Synchronizer {
             return null;
         }
 
-        Map<String,String> params = new HashMap<>(10);
+        Map<String,String> params = new HashMap<>(1);
 
         params.put("key", key);
 
diff --git a/pom.xml b/pom.xml
index 92199bddd..15d8ceb5f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -786,7 +786,7 @@
             <dependency>
                 <groupId>com.fasterxml.jackson.core</groupId>
                 <artifactId>jackson-databind</artifactId>
-                <version>2.9.10.3</version>
+                <version>2.9.10.4</version>
             </dependency>
             <dependency>
                 <groupId>org.codehaus.jackson</groupId>