[jira] [Commented] (YARN-8657) User limit calculation should be read-lock-protected within LeafQueue

["Sunil Govindan (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-8657?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16608717#comment-16608717 ] 

Sunil Govindan commented on YARN-8657:
--------------------------------------

[~leftnoteasy] Patch looks good to me. Will commit tomorrow if no objections.

cc [~cheersyang]

> User limit calculation should be read-lock-protected within LeafQueue
> ---------------------------------------------------------------------
>
>                 Key: YARN-8657
>                 URL: https://issues.apache.org/jira/browse/YARN-8657
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacity scheduler
>            Reporter: Sumana Sathish
>            Assignee: Wangda Tan
>            Priority: Critical
>         Attachments: YARN-8657.001.patch
>
>
> When async scheduling is enabled, user limit calculation could be wrong: 
> It is possible that scheduler calculated a user_limit, but inside {{canAssignToUser}} it becomes staled. 
> We need to protect user limit calculation.



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