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https://issues.apache.org/jira/browse/YARN-2309?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Zhijie Shen resolved YARN-2309.
-------------------------------
Resolution: Duplicate
> NPE during RM-Restart test scenario
> -----------------------------------
>
> Key: YARN-2309
> URL: https://issues.apache.org/jira/browse/YARN-2309
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 2.4.0
> Reporter: Nishan Shetty
> Priority: Minor
>
> During RMRestart test scenarios, we met with below exception.
> A point to note here is, Zookeeper also was not stable during this testing,
> we could see many Zookeeper exception before getting this NPE
> {code}
> 2014-07-10 10:49:46,817 WARN org.apache.hadoop.service.AbstractService: When
> stopping the service
> org.apache.hadoop.yarn.server.resourcemanager.EmbeddedElectorService :
> java.lang.NullPointerException
> java.lang.NullPointerException
> at
> org.apache.hadoop.yarn.server.resourcemanager.EmbeddedElectorService.serviceStop(EmbeddedElectorService.java:108)
> at
> org.apache.hadoop.service.AbstractService.stop(AbstractService.java:221)
> at
> org.apache.hadoop.service.ServiceOperations.stop(ServiceOperations.java:52)
> at
> org.apache.hadoop.service.ServiceOperations.stopQuietly(ServiceOperations.java:80)
> at
> org.apache.hadoop.service.AbstractService.init(AbstractService.java:171)
> at
> org.apache.hadoop.service.CompositeService.serviceInit(CompositeService.java:107)
> at
> org.apache.hadoop.yarn.server.resourcemanager.AdminService.serviceInit(AdminService.java:125)
> at
> org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
> at
> org.apache.hadoop.service.CompositeService.serviceInit(CompositeService.java:107)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.serviceInit(ResourceManager.java:232)
> at
> org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.main(ResourceManager.java:1039)
> {code}
> Zookeeper Exception
> {code}
> 2014-07-10 10:49:46,816 INFO org.apache.hadoop.service.AbstractService:
> Service org.apache.hadoop.yarn.server.resourcemanager.EmbeddedElectorService
> failed in state INITED; cause:
> org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode
> = ConnectionLoss
> org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode
> = ConnectionLoss
> at org.apache.zookeeper.KeeperException.create(KeeperException.java:99)
> at
> org.apache.hadoop.ha.ActiveStandbyElector$WatcherWithClientRef.waitForZKConnectionEvent(ActiveStandbyElector.java:1046)
> at
> org.apache.hadoop.ha.ActiveStandbyElector$WatcherWithClientRef.access$400(ActiveStandbyElector.java:1017)
> at
> org.apache.hadoop.ha.ActiveStandbyElector.getNewZooKeeper(ActiveStandbyElector.java:632)
> at
> org.apache.hadoop.ha.ActiveStandbyElector.createConnection(ActiveStandbyElector.java:766)
> {code}
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