yujun-8848 opened a new issue #1979:
URL: https://github.com/apache/shardingsphere-elasticjob/issues/1979
when i stop the applicaiton,the job will trow some exceptions.
How can I gracefully exit a scheduled task？
```
2021-09-13 09:12:07.359 WARN 61205 --- [ionShutdownHook]
com.alibaba.nacos.client.naming : [NamingHttpClientManager]
Destruction of the end
2021-09-13 09:12:07.359 INFO 61205 --- [ionShutdownHook]
com.alibaba.nacos.client.naming :
com.alibaba.nacos.client.naming.core.ServerListManager do shutdown stop
2021-09-13 09:12:07.359 INFO 61205 --- [ionShutdownHook]
com.alibaba.nacos.client.naming :
com.alibaba.nacos.client.naming.remote.http.NamingHttpClientProxy do shutdown
begin
2021-09-13 09:12:07.359 INFO 61205 --- [ionShutdownHook]
com.alibaba.nacos.client.naming :
com.alibaba.nacos.client.naming.beat.BeatReactor do shutdown begin
2021-09-13 09:12:07.359 INFO 61205 --- [ionShutdownHook]
com.alibaba.nacos.client.naming :
com.alibaba.nacos.client.naming.beat.BeatReactor do shutdown stop
2021-09-13 09:12:07.359 WARN 61205 --- [ionShutdownHook]
com.alibaba.nacos.client.naming : [NamingHttpClientManager] Start
destroying NacosRestTemplate
2021-09-13 09:12:07.359 WARN 61205 --- [ionShutdownHook]
com.alibaba.nacos.client.naming : [NamingHttpClientManager]
Destruction of the end
2021-09-13 09:12:07.359 INFO 61205 --- [ionShutdownHook]
c.a.n.client.identify.CredentialWatcher : [null] CredentialWatcher is stopped
2021-09-13 09:12:07.360 INFO 61205 --- [ionShutdownHook]
c.a.n.client.identify.CredentialService : [null] CredentialService is freed
2021-09-13 09:12:07.360 INFO 61205 --- [ionShutdownHook]
com.alibaba.nacos.client.naming :
com.alibaba.nacos.client.naming.remote.http.NamingHttpClientProxy do shutdown
stop
2021-09-13 09:12:07.360 INFO 61205 --- [ionShutdownHook]
com.alibaba.nacos.common.remote.client : Shutdown rpc client ,set status to
shutdown
2021-09-13 09:12:07.360 INFO 61205 --- [ionShutdownHook]
com.alibaba.nacos.common.remote.client : Shutdown client event executor
java.util.concurrent.ScheduledThreadPoolExecutor@2b76189e[Running, pool size =
2, active threads = 2, queued tasks = 0, completed tasks = 0]
2021-09-13 09:12:07.360 INFO 61205 --- [ionShutdownHook]
com.alibaba.nacos.common.remote.client : Close current connection
1631495343812_172.16.3.57_53198
2021-09-13 09:12:07.362 INFO 61205 --- [ionShutdownHook]
c.a.n.c.remote.client.grpc.GrpcClient : Shutdown grpc executor
java.util.concurrent.ThreadPoolExecutor@28928814[Running, pool size = 11,
active threads = 0, queued tasks = 0, completed tasks = 83]
2021-09-13 09:12:07.363 INFO 61205 --- [ionShutdownHook]
com.alibaba.nacos.client.naming :
com.alibaba.nacos.client.naming.remote.NamingClientProxyDelegate do shutdown
stop
2021-09-13 09:12:07.366 WARN 61205 --- [ionShutdownHook]
o.s.b.f.support.DisposableBeanAdapter : Destroy method 'close' on bean with
name 'nacosServiceRegistry' threw an exception: java.lang.NullPointerException
2021-09-13 09:12:07.392 INFO 61205 --- [ionShutdownHook]
com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated...
2021-09-13 09:12:07.419 INFO 61205 --- [ionShutdownHook]
com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed.
2021-09-13 09:12:07.936 INFO 61205 --- [tor-Framework-0]
o.a.c.f.imps.CuratorFrameworkImpl : backgroundOperationsLoop exiting
2021-09-13 09:12:08.056 INFO 61205 --- [ain-EventThread]
org.apache.zookeeper.ClientCnxn : EventThread shut down for session:
0x1002dbd6db30010
2021-09-13 09:12:08.056 INFO 61205 --- [ionShutdownHook]
org.apache.zookeeper.ZooKeeper : Session: 0x1002dbd6db30010 closed
Exception in thread "Quartz Shutdown-Hook secondJob"
org.apache.shardingsphere.elasticjob.reg.exception.RegException:
java.lang.IllegalStateException: Expected state [STARTED] was [STOPPED]
at
org.apache.shardingsphere.elasticjob.reg.exception.RegExceptionHandler.handleException(RegExceptionHandler.java:48)
at
org.apache.shardingsphere.elasticjob.reg.zookeeper.ZookeeperRegistryCenter.getDirectly(ZookeeperRegistryCenter.java:162)
at
org.apache.shardingsphere.elasticjob.reg.zookeeper.ZookeeperRegistryCenter.get(ZookeeperRegistryCenter.java:143)
at
org.apache.shardingsphere.elasticjob.lite.internal.storage.JobNodeStorage.getJobNodeData(JobNodeStorage.java:77)
at
org.apache.shardingsphere.elasticjob.lite.internal.election.LeaderService.isLeader(LeaderService.java:82)
at
org.apache.shardingsphere.elasticjob.lite.internal.schedule.JobShutdownHookPlugin.shutdown(JobShutdownHookPlugin.java:68)
at
org.quartz.core.QuartzScheduler.shutdownPlugins(QuartzScheduler.java:2381)
at org.quartz.core.QuartzScheduler.shutdown(QuartzScheduler.java:730)
at org.quartz.impl.StdScheduler.shutdown(StdScheduler.java:206)
at
org.apache.shardingsphere.elasticjob.lite.internal.schedule.JobScheduleController.shutdown(JobScheduleController.java:173)
at
org.apache.shardingsphere.elasticjob.lite.internal.schedule.JobShutdownHookPlugin$1.run(JobShutdownHookPlugin.java:82)
Caused by: java.lang.IllegalStateException: Expected state [STARTED] was
[STOPPED]
at
org.apache.curator.shaded.com.google.common.base.Preconditions.checkState(Preconditions.java:823)
at
org.apache.curator.framework.imps.CuratorFrameworkImpl.checkState(CuratorFrameworkImpl.java:423)
at
org.apache.curator.framework.imps.CuratorFrameworkImpl.getData(CuratorFrameworkImpl.java:457)
at
org.apache.shardingsphere.elasticjob.reg.zookeeper.ZookeeperRegistryCenter.getDirectly(ZookeeperRegistryCenter.java:158)
... 9 more
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