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https://issues.apache.org/jira/browse/YARN-2083?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14007786#comment-14007786
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Sandy Ryza commented on YARN-2083:
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I think it would be better to solve this by making sure the queue cannot
actually exceed the maxResources limit. I.e. to also check the constraint
*after* picking a container that would be assigned.
> In fair scheduler, Queue should not been assigned more containers when its
> usedResource had reach the maxResource limit
> -----------------------------------------------------------------------------------------------------------------------
>
> Key: YARN-2083
> URL: https://issues.apache.org/jira/browse/YARN-2083
> Project: Hadoop YARN
> Issue Type: Bug
> Components: scheduler
> Affects Versions: 2.3.0
> Reporter: Yi Tian
> Labels: assignContainer, fair, scheduler
> Fix For: 2.3.0
>
> Attachments: YARN-2083.patch
>
>
> In fair scheduler, FSParentQueue and FSLeafQueue do an
> assignContainerPreCheck to guaranty this queue is not over its limit.
> But the fitsIn function in Resource.java did not return false when the
> usedResource equals the maxResource.
> I think we should create a new Function "fitsInWithoutEqual" instead of
> "fitsIn" in this case.
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