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From "Sunil G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2925) Internal fields in LeafQueue access should be protected when accessed from FiCaSchedulerApp to calculate Headroom
Date Fri, 05 Dec 2014 17:49:12 GMT

    [ https://issues.apache.org/jira/browse/YARN-2925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14235788#comment-14235788
] 

Sunil G commented on YARN-2925:
-------------------------------

HI [~wangda]

Do you mean completely remove CS specific lock here, and protect only the data structures
with lock from LeafQueue?


> Internal fields in LeafQueue access should be protected when accessed from FiCaSchedulerApp
to calculate Headroom
> -----------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-2925
>                 URL: https://issues.apache.org/jira/browse/YARN-2925
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacityscheduler
>            Reporter: Wangda Tan
>            Assignee: Wangda Tan
>            Priority: Critical
>
> Upon YARN-2644, FiCaScheduler will calculation up-to-date headroom before sending back
Allocation response to AM.
> Headroom calculation is happened in LeafQueue side, uses fields like used resource, etc.
But it is not protected by any lock of LeafQueue, so it might be corrupted is someone else
is editing it.



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