diff --git a/config/src/main/java/com/alibaba/nacos/config/server/service/kubernetes/ConfigMapSyncService.java b/config/src/main/java/com/alibaba/nacos/config/server/service/kubernetes/ConfigMapSyncService.java
index 64827de92da..5a410e325a8 100644
--- a/config/src/main/java/com/alibaba/nacos/config/server/service/kubernetes/ConfigMapSyncService.java
+++ b/config/src/main/java/com/alibaba/nacos/config/server/service/kubernetes/ConfigMapSyncService.java
@@ -23,11 +23,31 @@
 
 import java.io.IOException;
 
+/**
+ * ConfigMap synchronize service.
+ *
+ * @author wangyixing
+ */
 public interface ConfigMapSyncService {
     
+    /**
+     * publish k8s configMap.
+     * @param configMap configMap entry
+     * @param srcIp client's Ip
+     * @throws NacosException exception
+     */
     void publishConfigMap(V1ConfigMap configMap, String srcIp) throws NacosException;
     
+    /**
+     * delete k8s configMap.
+     * @param configMap configMap entry
+     * @param clientIp client's Ip
+     */
     void deleteConfigMap(V1ConfigMap configMap, String clientIp);
     
+    /**
+     * start watch function.
+     * @throws IOException exception
+     */
     void startWatchConfigMap() throws IOException;
 }
diff --git a/config/src/main/java/com/alibaba/nacos/config/server/service/kubernetes/KubernetesConfigMapSyncServer.java b/config/src/main/java/com/alibaba/nacos/config/server/service/kubernetes/ConfigMapSyncServiceImpl.java
similarity index 99%
rename from config/src/main/java/com/alibaba/nacos/config/server/service/kubernetes/KubernetesConfigMapSyncServer.java
rename to config/src/main/java/com/alibaba/nacos/config/server/service/kubernetes/ConfigMapSyncServiceImpl.java
index 35ac9b517bc..0605b5aca14 100644
--- a/config/src/main/java/com/alibaba/nacos/config/server/service/kubernetes/KubernetesConfigMapSyncServer.java
+++ b/config/src/main/java/com/alibaba/nacos/config/server/service/kubernetes/ConfigMapSyncServiceImpl.java
@@ -65,7 +65,7 @@
  * @author wangyixing
  */
 @Service
-public class KubernetesConfigMapSyncServer implements ConfigMapSyncService {
+public class ConfigMapSyncServiceImpl implements ConfigMapSyncService {
     
     private Gson gson = new Gson();
     
@@ -99,7 +99,7 @@ public void start() throws IOException {
         startWatchConfigMap();
         Runtime.getRuntime().addShutdownHook(new Thread(() -> {
             Loggers.MAIN.info("[{}] stopping...", "configMap-sync");
-            KubernetesConfigMapSyncServer.this.stop();
+            ConfigMapSyncServiceImpl.this.stop();
             Loggers.MAIN.info("[{}] stopped.", "configMap-sync");
         }));
     }
diff --git a/config/src/main/java/com/alibaba/nacos/config/server/service/kubernetes/ConfigMapSyncTask.java b/config/src/main/java/com/alibaba/nacos/config/server/service/kubernetes/ConfigMapSyncTask.java
index f503b7fc879..23b253d1ada 100644
--- a/config/src/main/java/com/alibaba/nacos/config/server/service/kubernetes/ConfigMapSyncTask.java
+++ b/config/src/main/java/com/alibaba/nacos/config/server/service/kubernetes/ConfigMapSyncTask.java
@@ -57,7 +57,7 @@ public class ConfigMapSyncTask {
     private ConfigMapSyncConfig configMapSyncConfig;
 
     @Autowired
-    private KubernetesConfigMapSyncServer kubernetesConfigMapSyncServer;
+    private ConfigMapSyncServiceImpl configMapSyncService;
     
     /**
      * Initialize ConfigMapSyncTask.
@@ -66,7 +66,7 @@ public class ConfigMapSyncTask {
     @PostConstruct
     public void init() throws IOException {
         if (configMapSyncConfig.isOutsideCluster()) {
-            apiClient = kubernetesConfigMapSyncServer.getOutsideApiClient();
+            apiClient = configMapSyncService.getOutsideApiClient();
             coreV1Api = new CoreV1Api(apiClient);
         } else {
             coreV1Api = new CoreV1Api();
@@ -92,11 +92,11 @@ public void checkAndSyncConfigMaps() {
                 ConfigInfoWrapper configInfo = configInfoPersistService.findConfigInfo(dataId, group, namespace);
                 if (configInfo == null) {
                     Loggers.MAIN.info("[{}] find a missed config.", "configMap-sync");
-                    kubernetesConfigMapSyncServer.publishConfigMap(configMap, apiClient.getBasePath());
+                    configMapSyncService.publishConfigMap(configMap, apiClient.getBasePath());
                 } else {
                     if (!compareContent(content, configInfo.getContent())) {
                         Loggers.MAIN.info("[{}] find content difference.", "configMap-sync");
-                        kubernetesConfigMapSyncServer.publishConfigMap(configMap, apiClient.getBasePath());
+                        configMapSyncService.publishConfigMap(configMap, apiClient.getBasePath());
                     }
                 }
             }
@@ -145,7 +145,6 @@ private boolean isPair(String line) {
         if (containsDoubleEqual) {
             newLine = line.replace("==", "");
         }
-        boolean containsEqual = newLine.contains("=");
-        return containsEqual;
+        return newLine.contains("=");
     }
 }