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https://issues.apache.org/jira/browse/HIVE-10736?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14573274#comment-14573274
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Gunther Hagleitner commented on HIVE-10736:
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+1 branch-1.2 as well?
> HiveServer2 shutdown of cached tez app-masters is not clean
> -----------------------------------------------------------
>
> Key: HIVE-10736
> URL: https://issues.apache.org/jira/browse/HIVE-10736
> Project: Hive
> Issue Type: Bug
> Components: HiveServer2
> Reporter: Gopal V
> Assignee: Vikram Dixit K
> Attachments: HIVE-10736.1.patch, HIVE-10736.2.patch
>
>
> The shutdown process throws concurrent modification exceptions and fails to
> clean up the app masters per queue.
> {code}
> 2015-05-17 20:24:00,464 INFO [Thread-6()]: service.AbstractService
> (AbstractService.java:stop(125)) - Service:OperationManager is stopped.
> 2015-05-17 20:24:00,464 INFO [Thread-6()]: service.AbstractService
> (AbstractService.java:stop(125)) - Service:SessionManager is stopped.
> 2015-05-17 20:24:00,464 INFO [Thread-9()]: tez.TezSessionPoolManager
> (TezSessionPoolManager.java:close(175)) - Closing tez session default? true
> 2015-05-17 20:24:00,465 INFO [Thread-9()]: tez.TezSessionPoolManager
> (TezSessionPoolManager.java:close(175)) - Closing tez session default? true
> 2015-05-17 20:24:00,465 INFO [Thread-9()]: tez.TezSessionPoolManager
> (TezSessionPoolManager.java:close(175)) - Closing tez session default? true
> 2015-05-17 20:24:00,465 INFO [Thread-9()]: tez.TezSessionPoolManager
> (TezSessionPoolManager.java:close(175)) - Closing tez session default? true
> 2015-05-17 20:24:00,465 INFO [Thread-9()]: tez.TezSessionPoolManager
> (TezSessionPoolManager.java:close(175)) - Closing tez session default? true
> 2015-05-17 20:24:00,465 INFO [Thread-9()]: tez.TezSessionPoolManager
> (TezSessionPoolManager.java:close(175)) - Closing tez session default? true
> 2015-05-17 20:24:00,465 INFO [Thread-9()]: tez.TezSessionPoolManager
> (TezSessionPoolManager.java:close(175)) - Closing tez session default? true
> 2015-05-17 20:24:00,465 INFO [Thread-9()]: tez.TezSessionPoolManager
> (TezSessionPoolManager.java:close(175)) - Closing tez session default? true
> 2015-05-17 20:24:00,465 INFO [Thread-6()]: service.AbstractService
> (AbstractService.java:stop(125)) - Service:CLIService is stopped.
> 2015-05-17 20:24:00,465 INFO [Thread-6()]: service.AbstractService
> (AbstractService.java:stop(125)) - Service:HiveServer2 is stopped.
> 2015-05-17 20:24:00,465 INFO [Thread-6()]: tez.TezSessionState
> (TezSessionState.java:close(332)) - Closing Tez Session
> 2015-05-17 20:24:00,466 INFO [Thread-6()]: client.TezClient
> (TezClient.java:stop(495)) - Shutting down Tez Session,
> sessionName=HIVE-94cc629d-63bc-490a-a135-af85c0cc0f2e,
> applicationId=application_1431919257083_0012
> 2015-05-17 20:24:00,570 ERROR [Thread-6()]: server.HiveServer2
> (HiveServer2.java:stop(322)) - Tez session pool manager stop had an error
> during stop of HiveServer2. Shutting down HiveServer2 anyway.
> java.util.ConcurrentModificationException
> at
> java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:966)
> at java.util.LinkedList$ListItr.next(LinkedList.java:888)
> at
> org.apache.hadoop.hive.ql.exec.tez.TezSessionPoolManager.stop(TezSessionPoolManager.java:187)
> at
> org.apache.hive.service.server.HiveServer2.stop(HiveServer2.java:320)
> at
> org.apache.hive.service.server.HiveServer2$1.run(HiveServer2.java:107)
> {code}
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