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https://issues.apache.org/jira/browse/YARN-3215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14353890#comment-14353890
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Wangda Tan commented on YARN-3215:
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Yes, it works for no-labeled environment only, I added some details in 
description, please feel free to let me know your ideas.

Thanks,

> Respect labels in CapacityScheduler when computing headroom
> -----------------------------------------------------------
>
>                 Key: YARN-3215
>                 URL: https://issues.apache.org/jira/browse/YARN-3215
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: capacityscheduler
>            Reporter: Wangda Tan
>            Assignee: Wangda Tan
>
> In existing CapacityScheduler, when computing headroom of an application, it 
> will only consider "non-labeled" nodes of this application.
> But it is possible the application is asking for labeled resources, so 
> headroom-by-label (like 5G resource available under node-label=red) is 
> required to get better resource allocation and avoid deadlocks such as 
> MAPREDUCE-5928.
> This JIRA could involve both API changes (such as adding a 
> label-to-available-resource map in AllocateResponse) and also internal 
> changes in CapacityScheduler.



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