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From "Rajesh Balamohan (Jira)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-23446) LLAP: Reduce IPC connection misses to AM for short queries
Date Tue, 12 May 2020 12:09:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-23446?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17105362#comment-17105362
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Rajesh Balamohan commented on HIVE-23446:
-----------------------------------------

RB link: https://reviews.apache.org/r/72499/diff/1#index_header

> LLAP: Reduce IPC connection misses to AM for short queries
> ----------------------------------------------------------
>
>                 Key: HIVE-23446
>                 URL: https://issues.apache.org/jira/browse/HIVE-23446
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Rajesh Balamohan
>            Assignee: Rajesh Balamohan
>            Priority: Major
>         Attachments: HIVE-23446.1.patch
>
>
> [https://github.com/apache/hive/blob/master/llap-server/src/java/org/apache/hadoop/hive/llap/daemon/impl/QueryInfo.java#L343]
>  
> Umbilical UGI pool for is maintained at QueryInfo level. When there are lots of short
queries, this ends up missing IPC cache and ends up recreating threads/connections to the
same AM.
> It would be good to maintain this pool in {{ContainerRunnerImpl}} instead and recycle
as needed.
>  



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