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From "Akira Ajisaka (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-8404) Timeline event publish need to be async to avoid Dispatcher thread leak in case ATS is down
Date Tue, 30 Oct 2018 00:53:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-8404?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16667945#comment-16667945
] 

Akira Ajisaka commented on YARN-8404:
-------------------------------------

IMO, this issue should be backported to branch-2.9. Hi [~sunilg] and [~rohithsharma], what
do you think?

> Timeline event publish need to be async to avoid Dispatcher thread leak in case ATS is
down
> -------------------------------------------------------------------------------------------
>
>                 Key: YARN-8404
>                 URL: https://issues.apache.org/jira/browse/YARN-8404
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 3.1.0, 3.0.2
>            Reporter: Rohith Sharma K S
>            Assignee: Rohith Sharma K S
>            Priority: Blocker
>             Fix For: 2.10.0, 3.2.0, 3.1.1, 3.0.4
>
>         Attachments: YARN-8404.01.patch
>
>
> It is observed that if ATS1/1.5 daemon is not running, RM recovery is delayed as long
as timeline client get timed out for each applications. By default, timed out will take around
5 mins. If completed applications are more then amount of time RM will wait is *(number of
completed applications in a cluster * 5 minutes)* which is kind of hanged. 
> Primary reason for this behavior is YARN-3044 YARN-4129 which refactor existing system
metric publisher. This refactoring made appFinished event as synchronous which was asynchronous
earlier. 



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