[jira] [Commented] (ZOOKEEPER-1961) NPE in ZooKeeperServerMain.shutdown()

["Steve Loughran (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-1961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14055077#comment-14055077 ] 

Steve Loughran commented on ZOOKEEPER-1961:
-------------------------------------------

stack
{code}
at org.apache.hadoop.yarn.registry.server.services.RegistryZKService.newCurator(RegistryZKService.java:148)
	at org.apache.hadoop.yarn.registry.server.services.RegistryZKService.serviceStart(RegistryZKService.java:83)
	at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
	at org.apache.hadoop.yarn.registry.server.services.TestRegistryZKService.testRegistryStart(TestRegistryZKService.java:32)

org.apache.hadoop.yarn.registry.server.services.TestRegistryZKService  Time elapsed: 1.021 sec  <<< ERROR!
java.lang.NullPointerException: null
	at org.apache.zookeeper.server.ZooKeeperServerMain.shutdown(ZooKeeperServerMain.java:132)
	at org.apache.curator.test.TestingZooKeeperMain.close(TestingZooKeeperMain.java:103)
	at org.apache.curator.test.TestingZooKeeperServer.stop(TestingZooKeeperServer.java:94)
	at org.apache.curator.test.TestingZooKeeperServer.close(TestingZooKeeperServer.java:106)
	at org.apache.curator.test.TestingServer.close(TestingServer.java:112)
	at org.apache.hadoop.yarn.registry.AbstractZKRegistryTest.destroyZKServer(AbstractZKRegistryTest.java:56)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:33)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
	at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:264)
	at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:153)
	at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:124)
	at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:200)
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:153)
	at org.apache.maven.surefire.
{code}

> NPE in ZooKeeperServerMain.shutdown()
> -------------------------------------
>
>                 Key: ZOOKEEPER-1961
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1961
>             Project: ZooKeeper
>          Issue Type: Improvement
>          Components: server
>    Affects Versions: 3.4.6
>            Reporter: Steve Loughran
>
> while trying to stop a server that appears not to have started properly, the {{stop()}} method triggered an NPE



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