[jira] [Commented] (HADOOP-17861) improve YARN Registry DNS Server qps

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-17861?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18040735#comment-18040735 ] 

ASF GitHub Bot commented on HADOOP-17861:
-----------------------------------------

github-actions[bot] commented on PR #3326:
URL: https://github.com/apache/hadoop/pull/3326#issuecomment-3578184248

   We're closing this stale PR because it has been open for 100 days with no activity. This isn't a judgement on the merit of the PR in any way. It's just a way of keeping the PR queue manageable.
   If you feel like this was a mistake, or you would like to continue working on it, please feel free to re-open it and ask for a committer to remove the stale tag and review again.
   Thanks all for your contribution.




> improve YARN Registry DNS Server qps
> ------------------------------------
>
>                 Key: HADOOP-17861
>                 URL: https://issues.apache.org/jira/browse/HADOOP-17861
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: registry
>    Affects Versions: 3.1.2
>            Reporter: YUBI LEE
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> There are some points to improve the performance of YARN Registry DNS Server.
> - Do not print unnecessary logs (It just needs change log4j.properties)
> -- log4j.logger.org.apache.hadoop.registry.server.dns=WARN
> - Change some loglevels at points which can affect performance degradation.
> - Use "newFixedThreadPool" instead of "newCachedThreadPool" to prevent OOM
> - Use Blocking on TCP handler. Using non-blocking and sleeping some time("Thread.sleep(500)") is meaningless.
> In our environment, QPS of original yarn dns server is about 5000 (UDP), 100 (TCP).
> Now, QPS of our improved yarn dns server is about 47000 (UDP), 500 (TCP).
> I will make a pull request at https://github.com/apache/hadoop soon.



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