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https://issues.apache.org/jira/browse/YARN-2413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14096533#comment-14096533
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Chen He commented on YARN-2413:
-------------------------------
IMHO, we may need to include vcore into headroom calculation also if we turn on
the vcore as type of resource.
> capacity scheduler will overallocate vcores
> -------------------------------------------
>
> Key: YARN-2413
> URL: https://issues.apache.org/jira/browse/YARN-2413
> Project: Hadoop YARN
> Issue Type: Bug
> Components: documentation, scheduler
> Affects Versions: 3.0.0, 2.2.0
> Reporter: Allen Wittenauer
> Priority: Critical
>
> It doesn't appear that the capacity scheduler is properly allocating vcores
> when making scheduling decisions, which may result in overallocation of CPU
> resources.
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