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From "Szehon Ho (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-12250) Zookeeper connection leaks in Hive's HBaseHandler.
Date Mon, 26 Oct 2015 18:03:27 GMT

    [ https://issues.apache.org/jira/browse/HIVE-12250?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14974682#comment-14974682
] 

Szehon Ho commented on HIVE-12250:
----------------------------------

+1 from my side, thanks for fixing the flag, up to Aihua for his review comments.

> Zookeeper connection leaks in Hive's HBaseHandler.
> --------------------------------------------------
>
>                 Key: HIVE-12250
>                 URL: https://issues.apache.org/jira/browse/HIVE-12250
>             Project: Hive
>          Issue Type: Bug
>          Components: HiveServer2
>    Affects Versions: 1.1.0
>            Reporter: Naveen Gangam
>            Assignee: Naveen Gangam
>         Attachments: HIVE-12250.2.patch, HIVE-12250.patch
>
>
> HiveServer2 performance regresses severely due to what appears to be a leak in the ZooKeeper
connections. lsof output on the HS2 process shows about 8000 TCP connections to the ZK ensemble
nodes.
> grep TCP lsof-hive-node11 | grep node11 | grep -E "node03|node04|node05" | wc -l
>     7866 
> grep TCP lsof-hive-node11 | grep node11 | grep -E "node03" | wc -l
>     2615
> grep TCP lsof-hive-node11 | grep node11 | grep -E "node04" | wc -l
>     2622
> grep TCP lsof-hive-node11 | grep node11 | grep -E "node05" | wc -l
>     2629
> node11 - HMS node
> node03, node04 and node05 are the hosts for zookeeper ensemble.



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