diff --git a/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/WorkerServer.java b/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/WorkerServer.java
index 19cb417e30..340a11adf2 100644
--- a/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/WorkerServer.java
+++ b/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/WorkerServer.java
@@ -171,7 +171,7 @@ public class WorkerServer implements IStoppable {
         this.nettyRemotingServer.registerProcessor(CommandType.EXECUTE_TASK_REQUEST, new WorkerRequestProcessor(processService));
         this.nettyRemotingServer.start();
 
-        // TODO 注释掉，因为有心跳，可以复用心跳的逻辑，worker registry
+        // TODO ，because there is a heartbeat, you can reuse the heartbeat logic，worker registry
 //        this.workerRegistry = new WorkerRegistry(zookeeperRegistryCenter, serverConfig.getListenPort());
 //        this.workerRegistry.registry();
 
diff --git a/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/processor/TaskCallbackService.java b/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/processor/TaskCallbackService.java
index 2b6ed957d0..cd62e98a9b 100644
--- a/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/processor/TaskCallbackService.java
+++ b/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/processor/TaskCallbackService.java
@@ -26,14 +26,30 @@ import org.apache.dolphinscheduler.remote.command.ExecuteTaskResponseCommand;
 
 import java.util.concurrent.ConcurrentHashMap;
 
+/**
+ *  taks callback service
+ */
 public class TaskCallbackService {
 
+    /**
+     *  callback channels
+     */
     private static final ConcurrentHashMap<Integer, CallbackChannel> CALL_BACK_CHANNELS = new ConcurrentHashMap<>();
 
+    /**
+     *  add callback channel
+     * @param taskInstanceId taskInstanceId
+     * @param channel  channel
+     */
     public void addCallbackChannel(int taskInstanceId, CallbackChannel channel){
         CALL_BACK_CHANNELS.put(taskInstanceId, channel);
     }
 
+    /**
+     *  get callback channel
+     * @param taskInstanceId taskInstanceId
+     * @return callback channel
+     */
     public CallbackChannel getCallbackChannel(int taskInstanceId){
         CallbackChannel callbackChannel = CALL_BACK_CHANNELS.get(taskInstanceId);
         if(callbackChannel.getChannel().isActive()){
@@ -45,15 +61,30 @@ public class TaskCallbackService {
         return callbackChannel;
     }
 
+    /**
+     *  remove callback channels
+     * @param taskInstanceId taskInstanceId
+     */
     public void remove(int taskInstanceId){
         CALL_BACK_CHANNELS.remove(taskInstanceId);
     }
 
+    /**
+     *  send ack
+     * @param taskInstanceId taskInstanceId
+     * @param ackCommand ackCommand
+     */
     public void sendAck(int taskInstanceId, ExecuteTaskAckCommand ackCommand){
         CallbackChannel callbackChannel = getCallbackChannel(taskInstanceId);
         callbackChannel.getChannel().writeAndFlush(ackCommand.convert2Command(callbackChannel.getOpaque()));
     }
 
+    /**
+     *  send result
+     *
+     * @param taskInstanceId taskInstanceId
+     * @param responseCommand responseCommand
+     */
     public void sendResult(int taskInstanceId, ExecuteTaskResponseCommand responseCommand){
         CallbackChannel callbackChannel = getCallbackChannel(taskInstanceId);
         callbackChannel.getChannel().writeAndFlush(responseCommand.convert2Command(
diff --git a/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/processor/WorkerRequestProcessor.java b/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/processor/WorkerRequestProcessor.java
index 0a1b7c4837..8ea9ccbe5b 100644
--- a/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/processor/WorkerRequestProcessor.java
+++ b/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/processor/WorkerRequestProcessor.java
@@ -125,6 +125,12 @@ public class WorkerRequestProcessor implements NettyRequestProcessor {
                 processService, taskCallbackService));
     }
 
+    /**
+     *  whehter tenant is null
+     * @param tenant tenant
+     * @param taskInstance taskInstance
+     * @return result
+     */
     private boolean verifyTenantIsNull(Tenant tenant, TaskInstance taskInstance) {
         if(tenant == null){
             logger.error("tenant not exists,process instance id : {},task instance id : {}",
@@ -135,6 +141,11 @@ public class WorkerRequestProcessor implements NettyRequestProcessor {
         return false;
     }
 
+    /**
+     *  get execute local path
+     * @param taskInstance taskInstance
+     * @return execute local path
+     */
     private String getExecLocalPath(TaskInstance taskInstance){
         return FileUtils.getProcessExecDir(taskInstance.getProcessDefine().getProjectId(),
                 taskInstance.getProcessDefine().getId(),
diff --git a/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/registry/WorkerRegistry.java b/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/registry/WorkerRegistry.java
index 396b009c01..fc81638705 100644
--- a/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/registry/WorkerRegistry.java
+++ b/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/registry/WorkerRegistry.java
@@ -24,20 +24,36 @@ import org.apache.dolphinscheduler.server.registry.ZookeeperRegistryCenter;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-
+/**
+ *  worker registry
+ */
 public class WorkerRegistry {
 
     private final Logger logger = LoggerFactory.getLogger(WorkerRegistry.class);
 
+    /**
+     *  zookeeper registry center
+     */
     private final ZookeeperRegistryCenter zookeeperRegistryCenter;
 
+    /**
+     *  port
+     */
     private final int port;
 
+    /**
+     *  construct
+     * @param zookeeperRegistryCenter zookeeperRegistryCenter
+     * @param port port
+     */
     public WorkerRegistry(ZookeeperRegistryCenter zookeeperRegistryCenter, int port){
         this.zookeeperRegistryCenter = zookeeperRegistryCenter;
         this.port = port;
     }
 
+    /**
+     *  registry
+     */
     public void registry() {
         String address = Constants.LOCAL_ADDRESS;
         String localNodePath = getWorkerPath();
@@ -58,6 +74,9 @@ public class WorkerRegistry {
         logger.info("scheduler node : {} registry to ZK successfully.", address);
     }
 
+    /**
+     *  remove registry info
+     */
     public void unRegistry() {
         String address = getLocalAddress();
         String localNodePath = getWorkerPath();
@@ -65,12 +84,20 @@ public class WorkerRegistry {
         logger.info("worker node : {} unRegistry to ZK.", address);
     }
 
+    /**
+     *  get worker path
+     * @return
+     */
     private String getWorkerPath() {
         String address = getLocalAddress();
         String localNodePath = this.zookeeperRegistryCenter.getWorkerPath() + "/" + address;
         return localNodePath;
     }
 
+    /**
+     *  get local address
+     * @return
+     */
     private String getLocalAddress(){
         return Constants.LOCAL_ADDRESS + ":" + port;
     }