fix master server shutdown error (#1177)

* move updateTaskState into try/catch block in case of exception

* fix NPE

* using conf.getInt instead of getString

* for AbstractZKClient, remove the log, for it will print the same log message in createZNodePath.
for AlertDao, correct the spelling.

* duplicate

* refactor getTaskWorkerGroupId

* add friendly log

* update hearbeat thread num = 1

* fix the bug when worker execute task using queue. and remove checking Tenant user anymore in TaskScheduleThread

* 1. move verifyTaskInstanceIsNull after taskInstance
2. keep verifyTenantIsNull/verifyTaskInstanceIsNull clean and readable

* fix the message

* delete before check to avoid KeeperException$NoNodeException

* fix the message

* check processInstance state before delete tenant

* check processInstance state before delete worker group

* refactor

* merge api constants into common constatns

* update the resource perm

* update the dataSource perm

* fix CheckUtils.checkUserParams method

* update AlertGroupService, extends from BaseService, remove duplicate methods

* refactor

* modify method name

* add hasProjectAndPerm method

* using checkProject instead of getResultStatus

* delete checkAuth method, using hasProjectAndPerm instead.

* correct spelling

* add transactional for deleteWorkerGroupById

* add Transactional for deleteProcessInstanceById method

* change sqlSessionTemplate singleton

* change sqlSessionTemplate singleton and reformat code

* fix unsuitable error message

* update shutdownhook methods

* fix worker log bug

* fix api server debug mode bug

* upgrade zk version

* delete this line ,for zkClient.close() will do the whole thing

* fix master server shutdown error

dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/zk/ZKMasterClient.java

@@ -73,6 +73,11 @@ public class ZKMasterClient extends AbstractZKClient {
 	private static ZKMasterClient zkMasterClient = null;
 
 
+	private PathChildrenCache masterPathChildrenCache;
+
+	private PathChildrenCache workerPathChildrenCache;
+
+
 	private ZKMasterClient(ProcessDao processDao){
 		this.processDao = processDao;
 		init();
@@ -133,6 +138,19 @@ public class ZKMasterClient extends AbstractZKClient {
 		}
 	}
 
+	public void close(){
+		try {
+			if(masterPathChildrenCache != null){
+				masterPathChildrenCache.close();
+			}
+			if(workerPathChildrenCache != null){
+				workerPathChildrenCache.close();
+			}
+			super.close();
+		} catch (Exception ignore) {
+		}
+	}
+
 
 
 
@@ -175,12 +193,12 @@ public class ZKMasterClient extends AbstractZKClient {
 	 *  monitor master
 	 */
 	public void listenerMaster(){
-		PathChildrenCache masterPc = new PathChildrenCache(zkClient,
+		masterPathChildrenCache = new PathChildrenCache(zkClient,
 				getZNodeParentPath(ZKNodeType.MASTER), true ,defaultThreadFactory);
 
 		try {
-			masterPc.start();
+			masterPathChildrenCache.start();
-			masterPc.getListenable().addListener(new PathChildrenCacheListener() {
+			masterPathChildrenCache.getListenable().addListener(new PathChildrenCacheListener() {
 				@Override
 				public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception {
 					switch (event.getType()) {
@@ -273,12 +291,11 @@ public class ZKMasterClient extends AbstractZKClient {
 	 *  monitor worker
 	 */
 	public void listenerWorker(){
-
+		workerPathChildrenCache = new PathChildrenCache(zkClient,
-		PathChildrenCache workerPc = new PathChildrenCache(zkClient,
 				getZNodeParentPath(ZKNodeType.WORKER),true ,defaultThreadFactory);
 		try {
-			workerPc.start();
+			workerPathChildrenCache.start();
-			workerPc.getListenable().addListener(new PathChildrenCacheListener() {
+			workerPathChildrenCache.getListenable().addListener(new PathChildrenCacheListener() {
 				@Override
 				public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) {
 					switch (event.getType()) {