[jira] [Commented] (HIVE-5229) Better thread management for HiveServer2 async threads

["Vaibhav Gumashta (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-5229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13798388#comment-13798388 ] 

Vaibhav Gumashta commented on HIVE-5229:
----------------------------------------

Review board link: https://reviews.apache.org/r/14719/

> Better thread management for HiveServer2 async threads
> ------------------------------------------------------
>
>                 Key: HIVE-5229
>                 URL: https://issues.apache.org/jira/browse/HIVE-5229
>             Project: Hive
>          Issue Type: Improvement
>          Components: HiveServer2
>    Affects Versions: 0.12.0, 0.13.0
>            Reporter: Vaibhav Gumashta
>            Assignee: Vaibhav Gumashta
>             Fix For: 0.13.0
>
>         Attachments: HIVE-5229.1.patch
>
>
> [HIVE-4617|https://issues.apache.org/jira/browse/HIVE-4617] provides support for async execution in HS2. The async (background) thread pool currently creates N threads (server config), which are alive all the time. If all the threads in the pool are busy, a new request is added to a blocking queue. However, we can improve the strategy by not having all the async (background) threads alive when there are no corresponding requests. The async threads should die after a certain timeout if there are no new requests to handle. 



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