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https://issues.apache.org/jira/browse/YARN-2588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14144604#comment-14144604
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Rohith commented on YARN-2588:
------------------------------
Consider RM initially in standby.
1. StandBy RM
2. StandBy -->Active (Failed because of ZK session expire)
3. RM remain in StandBy state.
4. StandBy -->Active will fail with below exception
{code}
2014-09-20 14:21:36,980 | WARN | AsyncDispatcher event handler-EventThread |
Exception handling the winning of election |
org.apache.hadoop.ha.ActiveStandbyElector.becomeActive(ActiveStandbyElector.java:809)
org.apache.hadoop.ha.ServiceFailedException: RM could not transition to Active
at
org.apache.hadoop.yarn.server.resourcemanager.EmbeddedElectorService.becomeActive(EmbeddedElectorService.java:128)
at
org.apache.hadoop.ha.ActiveStandbyElector.becomeActive(ActiveStandbyElector.java:805)
at
org.apache.hadoop.ha.ActiveStandbyElector.processResult(ActiveStandbyElector.java:416)
at
org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:602)
at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:498)
Caused by: org.apache.hadoop.ha.ServiceFailedException: Error when
transitioning to Active mode
at
org.apache.hadoop.yarn.server.resourcemanager.AdminService.transitionToActive(AdminService.java:290)
at
org.apache.hadoop.yarn.server.resourcemanager.EmbeddedElectorService.becomeActive(EmbeddedElectorService.java:126)
... 4 more
Caused by: org.apache.hadoop.service.ServiceStateException: RMActiveServices
cannot enter state STARTED from state STOPPED
at
org.apache.hadoop.service.ServiceStateModel.checkStateTransition(ServiceStateModel.java:129)
at
org.apache.hadoop.service.ServiceStateModel.enterState(ServiceStateModel.java:111)
{code}
> Standby RM does not transitionToActive if previous transitionToActive is
> failed with ZK exception.
> --------------------------------------------------------------------------------------------------
>
> Key: YARN-2588
> URL: https://issues.apache.org/jira/browse/YARN-2588
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 3.0.0, 2.6.0, 2.5.1
> Reporter: Rohith
> Assignee: Rohith
>
> Consider scenario where, StandBy RM is failed to transition to Active because
> of ZK exception(connectionLoss or SessionExpired). Then any further
> transition to Active for same RM does not move RM to Active state.
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