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Posted to yarn-issues@hadoop.apache.org by "Wangda Tan (JIRA)" <ji...@apache.org> on 2018/08/14 00:05:00 UTC

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

    [ https://issues.apache.org/jira/browse/YARN-8657?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16579053#comment-16579053 ] 

Wangda Tan commented on YARN-8657:
----------------------------------

[~sunil.govind@gmail.com], [~cheersyang], could u help to review this ticket?

> 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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