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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-12926) Another synchronization issues with tez/llap session pool in hs2
Date Tue, 26 Jan 2016 01:44:39 GMT

     [ https://issues.apache.org/jira/browse/HIVE-12926?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sergey Shelukhin updated HIVE-12926:
------------------------------------
    Attachment: HIVE-12926.patch

Pool sessions remove themselves from openSessions; that is not a good idea while we are iterating
the session list.

> Another synchronization issues with tez/llap session pool in hs2
> ----------------------------------------------------------------
>
>                 Key: HIVE-12926
>                 URL: https://issues.apache.org/jira/browse/HIVE-12926
>             Project: Hive
>          Issue Type: Bug
>          Components: HiveServer2
>    Affects Versions: 2.0.0
>            Reporter: Siddharth Seth
>            Assignee: Sergey Shelukhin
>            Priority: Critical
>             Fix For: 2.0.0, 2.1.0
>
>         Attachments: HIVE-12926.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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