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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HIVE-12797) Synchronization issues with tez/llap session pool in hs2
Date Thu, 07 Jan 2016 00:31:39 GMT

    [ https://issues.apache.org/jira/browse/HIVE-12797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15086572#comment-15086572
] 

Sergey Shelukhin edited comment on HIVE-12797 at 1/7/16 12:31 AM:
------------------------------------------------------------------

Yeah, but we don't need the original synchronized list I assume, given that we synchronize
manually. Also TezJobMonitor iterates openSessions via getOpenSessions. It'd need to get a
snapshot or something.


was (Author: sershe):
Yeah, but we don't need a synchronized list I assume. Also TezJobMonitor iterates openSessions
via getOpenSessions. It'd need to get a snapshot or something.

> Synchronization issues with tez/llap session pool in hs2
> --------------------------------------------------------
>
>                 Key: HIVE-12797
>                 URL: https://issues.apache.org/jira/browse/HIVE-12797
>             Project: Hive
>          Issue Type: Bug
>          Components: HiveServer2
>    Affects Versions: 2.0.0
>            Reporter: Vikram Dixit K
>            Assignee: Vikram Dixit K
>         Attachments: HIVE-12797.1.patch
>
>
> The changes introduced as part of HIVE-12674 causes issues while shutting down hs2 when
session pools are used.
> {code}
> java.util.ConcurrentModificationException
>         at java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:966) ~[?:1.8.0_45]
>         at java.util.LinkedList$ListItr.remove(LinkedList.java:921) ~[?:1.8.0_45]
>         at org.apache.hadoop.hive.ql.exec.tez.TezSessionPoolManager.stop(TezSessionPoolManager.java:288)
~[hive-exec-2.0.0.2.3.5.0-79.jar:2.0.0.2.3.5.0-79]
>         at org.apache.hive.service.server.HiveServer2.stop(HiveServer2.java:479) [hive-jdbc-2.0.0.2.3.5.0-79-standalone.jar:2.0.0.2.3.5.0-79]
>         at org.apache.hive.service.server.HiveServer2$2.run(HiveServer2.java:183) [hive-jdbc-2.0.0.2.3.5.0-79-standalone.jar:2.0.0.2.3.5.0-79]
> {code}



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