Refactor worker (#2042)

* Refactor worker (#10)

* Refactor worker (#2000)

* Refactor worker (#2)

* Refactor worker (#1993)

* Refactor worker (#1)

* add TaskResponseProcessor (#1983)

* 1, master persistent task 2. extract  master and worker communication model (#1992)

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* add license

* modify javadoc error

Co-authored-by: qiaozhanwei <qiaozhanwei@outlook.com>

* updates

Co-authored-by: qiaozhanwei <qiaozhanwei@outlook.com>

* TaskExecutionContext create modify (#1994)

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* add license

* modify javadoc error

* TaskExecutionContext create modify

Co-authored-by: qiaozhanwei <qiaozhanwei@outlook.com>

* updates

* add- register processor

Co-authored-by: qiaozhanwei <qiaozhanwei@outlook.com>

* buildAckCommand taskInstanceId not set modify (#2002)

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* add license

* modify javadoc error

* TaskExecutionContext create modify

* buildAckCommand taskInstanceId not set modify

* java doc error modify (#2004)

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* add license

* modify javadoc error

* TaskExecutionContext create modify

* buildAckCommand taskInstanceId not set modify

* java doc error modify

* add comment (#2006)

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* add license

* modify javadoc error

* TaskExecutionContext create modify

* buildAckCommand taskInstanceId not set modify

* java doc error modify

* add comment

* ExecutorManager interface add generic type (#2012)

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* add license

* modify javadoc error

* TaskExecutionContext create modify

* buildAckCommand taskInstanceId not set modify

* java doc error modify

* add comment

* ExecutorManager interface add generic type

* Refactor worker (#2018)

* Refactor worker (#7)

* Refactor worker (#2000)

* Refactor worker (#2)

* Refactor worker (#1993)

* Refactor worker (#1)

* add TaskResponseProcessor (#1983)

* 1, master persistent task 2. extract  master and worker communication model (#1992)

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* add license

* modify javadoc error

Co-authored-by: qiaozhanwei <qiaozhanwei@outlook.com>

* updates

Co-authored-by: qiaozhanwei <qiaozhanwei@outlook.com>

* TaskExecutionContext create modify (#1994)

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* add license

* modify javadoc error

* TaskExecutionContext create modify

Co-authored-by: qiaozhanwei <qiaozhanwei@outlook.com>

* updates

* add- register processor

Co-authored-by: qiaozhanwei <qiaozhanwei@outlook.com>

* buildAckCommand taskInstanceId not set modify (#2002)

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* add license

* modify javadoc error

* TaskExecutionContext create modify

* buildAckCommand taskInstanceId not set modify

* java doc error modify (#2004)

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* add license

* modify javadoc error

* TaskExecutionContext create modify

* buildAckCommand taskInstanceId not set modify

* java doc error modify

* add comment (#2006)

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* add license

* modify javadoc error

* TaskExecutionContext create modify

* buildAckCommand taskInstanceId not set modify

* java doc error modify

* add comment

* ExecutorManager interface add generic type (#2012)

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* add license

* modify javadoc error

* TaskExecutionContext create modify

* buildAckCommand taskInstanceId not set modify

* java doc error modify

* add comment

* ExecutorManager interface add generic type

Co-authored-by: qiaozhanwei <qiaozhanwei@outlook.com>

* Refactor worker (#8)

* Refactor worker (#2000)

* Refactor worker (#2)

* Refactor worker (#1993)

* Refactor worker (#1)

* add TaskResponseProcessor (#1983)

* 1, master persistent task 2. extract  master and worker communication model (#1992)

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* add license

* modify javadoc error

Co-authored-by: qiaozhanwei <qiaozhanwei@outlook.com>

* updates

Co-authored-by: qiaozhanwei <qiaozhanwei@outlook.com>

* TaskExecutionContext create modify (#1994)

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* add license

* modify javadoc error

* TaskExecutionContext create modify

Co-authored-by: qiaozhanwei <qiaozhanwei@outlook.com>

* updates

* add- register processor

Co-authored-by: qiaozhanwei <qiaozhanwei@outlook.com>

* buildAckCommand taskInstanceId not set modify (#2002)

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* add license

* modify javadoc error

* TaskExecutionContext create modify

* buildAckCommand taskInstanceId not set modify

* java doc error modify (#2004)

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* add license

* modify javadoc error

* TaskExecutionContext create modify

* buildAckCommand taskInstanceId not set modify

* java doc error modify

* add comment (#2006)

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* add license

* modify javadoc error

* TaskExecutionContext create modify

* buildAckCommand taskInstanceId not set modify

* java doc error modify

* add comment

* ExecutorManager interface add generic type (#2012)

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* add license

* modify javadoc error

* TaskExecutionContext create modify

* buildAckCommand taskInstanceId not set modify

* java doc error modify

* add comment

* ExecutorManager interface add generic type

Co-authored-by: qiaozhanwei <qiaozhanwei@outlook.com>

* add kill command

Co-authored-by: qiaozhanwei <qiaozhanwei@outlook.com>

* add TaskInstanceCacheManager receive Worker report result，modify master polling db transfrom to cache (#2021)

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* 1, master persistent task
2. extract  master and worker communication model

* add license

* modify javadoc error

* TaskExecutionContext create modify

* buildAckCommand taskInstanceId not set modify

* java doc error modify

* add comment

* ExecutorManager interface add generic type

* add TaskInstanceCacheManager receive Worker report result

* TaskInstance setExecutePath

* add TaskInstanceCacheManager to receive Worker Task result report

* TaskInstanceCacheManager add remove method

* add license

* add dispatcht task method

* AbstractCommandExecutor remove db access

* AbstractCommandExecutor remove db access

* AbstractCommandExecutor remove db access

* AbstractCommandExecutor remove db access

* AbstractCommandExecutor remove db access

* AbstractCommandExecutor remove db access

* AbstractCommandExecutor remove db access

Co-authored-by: qiaozhanwei <qiaozhanwei@outlook.com>

* refactor heartbeat logic

* update registry and add worker group

* add worker group

Co-authored-by: qiaozhanwei <qiaozhanwei@outlook.com>

dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/Constants.java

@@ -173,6 +173,11 @@ public final class Constants {
      */
     public static final String COMMA = ",";
 
+    /**
+     * slash /
+     */
+    public static final String SLASH = "/";
+
     /**
      * COLON :
      */
@@ -994,4 +999,9 @@ public final class Constants {
      * dataSource sensitive param
      */
     public static final String DATASOURCE_PASSWORD_REGEX = "(?<=(\"password\":\")).*?(?=(\"))";
+
+    /**
+     * default worker group
+     */
+    public static final String DEFAULT_WORKER_GROUP = "default";
 }

dolphinscheduler-remote/src/main/java/org/apache/dolphinscheduler/remote/entity/TaskExecutionContext.java

@@ -160,6 +160,18 @@ public class TaskExecutionContext implements Serializable{
      */
     private int taskTimeout;
 
+    /**
+     * worker group
+     */
+    private String workerGroup;
+
+    public String getWorkerGroup() {
+        return workerGroup;
+    }
+
+    public void setWorkerGroup(String workerGroup) {
+        this.workerGroup = workerGroup;
+    }
 
     public Integer getTaskInstanceId() {
         return taskInstanceId;

dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/master/dispatch/context/ExecutionContext.java

@@ -17,6 +17,7 @@
 package org.apache.dolphinscheduler.server.master.dispatch.context;
 
 
+import org.apache.dolphinscheduler.remote.entity.TaskExecutionContext;
 import org.apache.dolphinscheduler.remote.utils.Host;
 import org.apache.dolphinscheduler.server.master.dispatch.enums.ExecutorType;
 
@@ -33,23 +34,27 @@ public class ExecutionContext {
     /**
      *  context
      */
-    private final Object context;
+    private final TaskExecutionContext context;
 
     /**
      *  executor type : worker or client
      */
     private final ExecutorType executorType;
 
-    public ExecutionContext(Object context, ExecutorType executorType) {
+    public ExecutionContext(TaskExecutionContext context, ExecutorType executorType) {
         this.context = context;
         this.executorType = executorType;
     }
 
+    public String getWorkerGroup(){
+        return context.getWorkerGroup();
+    }
+
     public ExecutorType getExecutorType() {
         return executorType;
     }
 
-    public Object getContext() {
+    public TaskExecutionContext getContext() {
         return context;
     }
 

dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/master/dispatch/executor/NettyExecutorManager.java

@@ -136,7 +136,7 @@ public class NettyExecutorManager extends AbstractExecutorManager<Boolean>{
         ExecutorType executorType = context.getExecutorType();
         switch (executorType){
             case WORKER:
-                TaskExecutionContext taskExecutionContext = (TaskExecutionContext)context.getContext();
+                TaskExecutionContext taskExecutionContext = context.getContext();
                 requestCommand.setTaskExecutionContext(FastJsonSerializer.serializeToString(taskExecutionContext));
                 break;
             case CLIENT:
@@ -191,7 +191,7 @@ public class NettyExecutorManager extends AbstractExecutorManager<Boolean>{
         ExecutorType executorType = context.getExecutorType();
         switch (executorType){
             case WORKER:
-                nodes = zookeeperNodeManager.getWorkerNodes();
+                nodes = zookeeperNodeManager.getWorkerGroupNodes(context.getWorkerGroup());
                 break;
             case CLIENT:
                 break;

dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/master/dispatch/host/RoundRobinHostManager.java

@@ -75,7 +75,7 @@ public class RoundRobinHostManager implements HostManager {
         ExecutorType executorType = context.getExecutorType();
         switch (executorType){
             case WORKER:
-                nodes = zookeeperNodeManager.getWorkerNodes();
+                nodes = zookeeperNodeManager.getWorkerGroupNodes(context.getWorkerGroup());
                 break;
             case CLIENT:
                 break;

dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/registry/ZookeeperNodeManager.java

@@ -17,9 +17,11 @@
 
 package org.apache.dolphinscheduler.server.registry;
 
+import org.apache.commons.collections.CollectionUtils;
 import org.apache.curator.framework.CuratorFramework;
 
 import org.apache.curator.framework.recipes.cache.TreeCacheEvent;
+import org.apache.dolphinscheduler.common.utils.StringUtils;
 import org.apache.dolphinscheduler.service.zk.AbstractListener;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -30,9 +32,12 @@ import org.springframework.stereotype.Service;
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.ReentrantLock;
 
+import static org.apache.dolphinscheduler.common.Constants.DEFAULT_WORKER_GROUP;
+
 /**
  *  zookeeper node manager
  */
@@ -47,14 +52,14 @@ public class ZookeeperNodeManager implements InitializingBean {
     private final Lock masterLock = new ReentrantLock();
 
     /**
-     *  worker lock
+     *  worker group lock
      */
-    private final Lock workerLock = new ReentrantLock();
+    private final Lock workerGroupLock = new ReentrantLock();
 
     /**
-     *  worker nodes
+     *  worker group nodes
      */
-    private final Set<String> workerNodes = new HashSet<>();
+    private final ConcurrentHashMap<String, Set<String>> workerGroupNodes = new ConcurrentHashMap<>();
 
     /**
      *  master nodes
@@ -84,7 +89,7 @@ public class ZookeeperNodeManager implements InitializingBean {
         /**
          * init WorkerNodeListener listener
          */
-        registryCenter.getZookeeperCachedOperator().addListener(new WorkerNodeListener());
+        registryCenter.getZookeeperCachedOperator().addListener(new WorkerGroupNodeListener());
     }
 
     /**
@@ -98,39 +103,55 @@ public class ZookeeperNodeManager implements InitializingBean {
         syncMasterNodes(masterNodes);
 
         /**
-         * worker nodes from zookeeper
+         * worker group nodes from zookeeper
          */
-        Set<String> workersNodes = registryCenter.getWorkerNodesDirectly();
+        Set<String> workerGroups = registryCenter.getWorkerGroupDirectly();
-        syncWorkerNodes(workersNodes);
+        for(String workerGroup : workerGroups){
+            syncWorkerGroupNodes(workerGroup, registryCenter.getWorkerGroupNodesDirectly(workerGroup));
+        }
     }
 
     /**
-     *  worker node listener
+     *  worker group node listener
      */
-    class WorkerNodeListener extends AbstractListener {
+    class WorkerGroupNodeListener extends AbstractListener {
 
         @Override
         protected void dataChanged(CuratorFramework client, TreeCacheEvent event, String path) {
             if(registryCenter.isWorkerPath(path)){
                 try {
                     if (event.getType() == TreeCacheEvent.Type.NODE_ADDED) {
-                        logger.info("worker node : {} added.", path);
+                        logger.info("worker group node : {} added.", path);
+                        String group = parseGroup(path);
+                        Set<String> workerNodes = workerGroupNodes.getOrDefault(group, new HashSet<>());
                         Set<String> previousNodes = new HashSet<>(workerNodes);
-                        Set<String> currentNodes = registryCenter.getWorkerNodesDirectly();
+                        Set<String> currentNodes = registryCenter.getWorkerGroupNodesDirectly(group);
-                        syncWorkerNodes(currentNodes);
+                        logger.info("currentNodes : {}", currentNodes);
+                        syncWorkerGroupNodes(group, currentNodes);
                     } else if (event.getType() == TreeCacheEvent.Type.NODE_REMOVED) {
-                        logger.info("worker node : {} down.", path);
+                        logger.info("worker group node : {} down.", path);
+                        String group = parseGroup(path);
+                        Set<String> workerNodes = workerGroupNodes.getOrDefault(group, new HashSet<>());
                         Set<String> previousNodes = new HashSet<>(workerNodes);
-                        Set<String> currentNodes = registryCenter.getWorkerNodesDirectly();
+                        Set<String> currentNodes = registryCenter.getWorkerGroupNodesDirectly(group);
-                        syncWorkerNodes(currentNodes);
+                        syncWorkerGroupNodes(group, currentNodes);
                     }
                 } catch (IllegalArgumentException ignore) {
                     logger.warn(ignore.getMessage());
                 } catch (Exception ex) {
-                    logger.error("WorkerListener capture data change and get data failed", ex);
+                    logger.error("WorkerGroupListener capture data change and get data failed", ex);
                 }
             }
         }
+
+        private String parseGroup(String path){
+            String[] parts = path.split("\\/");
+            if(parts.length != 6){
+                throw new IllegalArgumentException(String.format("worker group path : %s is not valid, ignore", path));
+            }
+            String group = parts[4];
+            return group;
+        }
     }
 
 
@@ -189,29 +210,42 @@ public class ZookeeperNodeManager implements InitializingBean {
     }
 
     /**
-     *  sync worker nodes
+     * sync worker group nodes
-     * @param nodes worker nodes
+     * @param workerGroup
+     * @param nodes
      */
-    private void syncWorkerNodes(Set<String> nodes){
+    private void syncWorkerGroupNodes(String workerGroup, Set<String> nodes){
-        workerLock.lock();
+        workerGroupLock.lock();
         try {
+            workerGroup = workerGroup.toLowerCase();
+            Set<String> workerNodes = workerGroupNodes.getOrDefault(workerGroup, new HashSet<>());
             workerNodes.clear();
             workerNodes.addAll(nodes);
+            workerGroupNodes.put(workerGroup, workerNodes);
         } finally {
-            workerLock.unlock();
+            workerGroupLock.unlock();
         }
     }
 
     /**
-     * get worker nodes
+     * get worker group nodes
-     * @return worker nodes
+     * @param workerGroup
+     * @return
      */
-    public Set<String> getWorkerNodes(){
+    public Set<String> getWorkerGroupNodes(String workerGroup){
-        workerLock.lock();
+        workerGroupLock.lock();
         try {
-            return Collections.unmodifiableSet(workerNodes);
+            if(StringUtils.isEmpty(workerGroup)){
+                workerGroup = DEFAULT_WORKER_GROUP;
+            }
+            workerGroup = workerGroup.toLowerCase();
+            Set<String> nodes = workerGroupNodes.get(workerGroup);
+            if(CollectionUtils.isNotEmpty(nodes)){
+                return Collections.unmodifiableSet(nodes);
+            }
+            return nodes;
         } finally {
-            workerLock.unlock();
+            workerGroupLock.unlock();
         }
     }
 

dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/registry/ZookeeperRegistryCenter.java

@@ -127,6 +127,25 @@ public class ZookeeperRegistryCenter implements InitializingBean {
         return new HashSet<>(workers);
     }
 
+    /**
+     * get worker group directly
+     * @return
+     */
+    public Set<String> getWorkerGroupDirectly() {
+        List<String> workers = getChildrenKeys(getWorkerPath());
+        return new HashSet<>(workers);
+    }
+
+    /**
+     * get worker group nodes
+     * @param workerGroup
+     * @return
+     */
+    public Set<String> getWorkerGroupNodesDirectly(String workerGroup) {
+        List<String> workers = getChildrenKeys(getWorkerGroupPath(workerGroup));
+        return new HashSet<>(workers);
+    }
+
     /**
      * whether worker path
      * @param path path
@@ -145,6 +164,15 @@ public class ZookeeperRegistryCenter implements InitializingBean {
         return path != null && path.contains(MASTER_PATH);
     }
 
+    /**
+     * get worker group path
+     * @param workerGroup
+     * @return
+     */
+    public String getWorkerGroupPath(String workerGroup) {
+        return WORKER_PATH + "/" + workerGroup;
+    }
+
     /**
      * get children nodes
      * @param key key

dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/WorkerServer.java

@@ -21,7 +21,6 @@ import org.apache.dolphinscheduler.common.IStoppable;
 import org.apache.dolphinscheduler.common.thread.Stopper;
 import org.apache.dolphinscheduler.common.thread.ThreadPoolExecutors;
 import org.apache.dolphinscheduler.common.thread.ThreadUtils;
-import org.apache.dolphinscheduler.dao.AlertDao;
 import org.apache.dolphinscheduler.remote.NettyRemotingServer;
 import org.apache.dolphinscheduler.remote.command.CommandType;
 import org.apache.dolphinscheduler.remote.config.NettyServerConfig;
@@ -37,13 +36,11 @@ import org.apache.dolphinscheduler.service.queue.TaskQueueFactory;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.WebApplicationType;
 import org.springframework.boot.builder.SpringApplicationBuilder;
 import org.springframework.context.annotation.ComponentScan;
 
 import javax.annotation.PostConstruct;
-import java.util.Set;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.ExecutorService;
 
@@ -58,30 +55,17 @@ public class WorkerServer implements IStoppable {
      */
     private static final Logger logger = LoggerFactory.getLogger(WorkerServer.class);
 
-
     /**
      *  zk worker client
      */
     @Autowired
     private ZKWorkerClient zkWorkerClient = null;
 
-
-    /**
-     *  alert database access
-     */
-    @Autowired
-    private AlertDao alertDao;
-
     /**
      * task queue impl
      */
     protected ITaskQueue taskQueue;
 
-    /**
-     * kill executor service
-     */
-    private ExecutorService killExecutorService;
-
     /**
      *  fetch task executor service
      */
@@ -92,9 +76,6 @@ public class WorkerServer implements IStoppable {
      */
     private CountDownLatch latch;
 
-    @Value("${server.is-combined-server:false}")
-    private Boolean isCombinedServer;
-
     /**
      *  worker config
      */
@@ -157,8 +138,6 @@ public class WorkerServer implements IStoppable {
 
         this.taskQueue = TaskQueueFactory.getTaskQueueInstance();
 
-        this.killExecutorService = ThreadUtils.newDaemonSingleThreadExecutor("Worker-Kill-Thread-Executor");
-
         this.fetchTaskExecutorService = ThreadUtils.newDaemonSingleThreadExecutor("Worker-Fetch-Thread-Executor");
 
         zkWorkerClient.setStoppable(this);
@@ -169,17 +148,15 @@ public class WorkerServer implements IStoppable {
         Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
             @Override
             public void run() {
-                stop("shutdownhook");
+                stop("shutdownHook");
             }
         }));
 
         //let the main thread await
         latch = new CountDownLatch(1);
-        if (!isCombinedServer) {
+        try {
-            try {
+            latch.await();
-                latch.await();
+        } catch (InterruptedException ignore) {
-            } catch (InterruptedException ignore) {
-            }
         }
     }
 
@@ -210,17 +187,10 @@ public class WorkerServer implements IStoppable {
             try {
                 ThreadPoolExecutors.getInstance().shutdown();
             }catch (Exception e){
-                logger.warn("threadpool service stopped exception:{}",e.getMessage());
+                logger.warn("threadPool service stopped exception:{}",e.getMessage());
             }
 
-            logger.info("threadpool service stopped");
+            logger.info("threadPool service stopped");
-
-            try {
-                killExecutorService.shutdownNow();
-            }catch (Exception e){
-                logger.warn("worker kill executor service stopped exception:{}",e.getMessage());
-            }
-            logger.info("worker kill executor service stopped");
 
             try {
                 fetchTaskExecutorService.shutdownNow();

dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/cache/TaskExecutionContextCacheManager.java

@@ -17,7 +17,6 @@
 
 package org.apache.dolphinscheduler.server.worker.cache;
 
-import org.apache.dolphinscheduler.dao.entity.TaskInstance;
 import org.apache.dolphinscheduler.remote.entity.TaskExecutionContext;
 
 /**

dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/cache/impl/TaskExecutionContextCacheManagerImpl.java

@@ -19,6 +19,7 @@ package org.apache.dolphinscheduler.server.worker.cache.impl;
 
 import org.apache.dolphinscheduler.remote.entity.TaskExecutionContext;
 import org.apache.dolphinscheduler.server.worker.cache.TaskExecutionContextCacheManager;
+import org.springframework.stereotype.Service;
 
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
@@ -26,6 +27,7 @@ import java.util.concurrent.ConcurrentHashMap;
 /**
  *  TaskExecutionContextCache
  */
+@Service
 public class TaskExecutionContextCacheManagerImpl implements TaskExecutionContextCacheManager {
 
 

dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/config/WorkerConfig.java

@@ -37,7 +37,7 @@ public class WorkerConfig {
     @Value("${worker.reserved.memory}")
     private double workerReservedMemory;
 
-    @Value("${worker.group: DEFAULT}")
+    @Value("${worker.group: default}")
     private String workerGroup;
 
     public String getWorkerGroup() {

dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/registry/WorkerRegistry.java

@@ -33,8 +33,9 @@ import java.util.concurrent.Executors;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.TimeUnit;
 
-import static org.apache.dolphinscheduler.remote.utils.Constants.COMMA;
+import static org.apache.dolphinscheduler.common.Constants.COMMA;
-import static org.apache.dolphinscheduler.remote.utils.Constants.SLASH;
+import static org.apache.dolphinscheduler.common.Constants.DEFAULT_WORKER_GROUP;
+import static org.apache.dolphinscheduler.common.Constants.SLASH;
 
 
 /**
@@ -44,8 +45,6 @@ public class WorkerRegistry {
 
     private final Logger logger = LoggerFactory.getLogger(WorkerRegistry.class);
 
-    private static final String DEFAULT_GROUP = "DEFAULT";
-
     /**
      *  zookeeper registry center
      */
@@ -74,7 +73,7 @@ public class WorkerRegistry {
     /**
      * worker group
      */
-    private final String workerGroup;
+    private String workerGroup;
 
     /**
      *  construct
@@ -82,7 +81,7 @@ public class WorkerRegistry {
      * @param port port
      */
     public WorkerRegistry(ZookeeperRegistryCenter zookeeperRegistryCenter, int port, long heartBeatInterval){
-        this(zookeeperRegistryCenter, port, heartBeatInterval, DEFAULT_GROUP);
+        this(zookeeperRegistryCenter, port, heartBeatInterval, DEFAULT_WORKER_GROUP);
     }
 
     /**
@@ -144,9 +143,11 @@ public class WorkerRegistry {
         StringBuilder builder = new StringBuilder(100);
         String workerPath = this.zookeeperRegistryCenter.getWorkerPath();
         builder.append(workerPath).append(SLASH);
-        if(StringUtils.isNotEmpty(workerGroup) && !DEFAULT_GROUP.equalsIgnoreCase(workerGroup)){
+        if(StringUtils.isEmpty(workerGroup)){
-            builder.append(workerGroup.trim()).append(SLASH);
+            workerGroup = DEFAULT_WORKER_GROUP;
         }
+        //trim and lower case is need
+        builder.append(workerGroup.trim().toLowerCase()).append(SLASH);
         builder.append(address);
         return builder.toString();
     }