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https://issues.apache.org/jira/browse/YARN-2933?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mayank Bansal updated YARN-2933:
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    Attachment: YARN-2933-1.patch

Attaching patch for avoiding preemption for labeled containers.

Thanks,
Mayank

> Capacity Scheduler preemption policy should only consider capacity without 
> labels temporarily
> ---------------------------------------------------------------------------------------------
>
>                 Key: YARN-2933
>                 URL: https://issues.apache.org/jira/browse/YARN-2933
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: capacityscheduler
>            Reporter: Wangda Tan
>            Assignee: Mayank Bansal
>         Attachments: YARN-2933-1.patch
>
>
> Currently, we have capacity enforcement on each queue for each label in 
> CapacityScheduler, but we don't have preemption policy to support that. 
> YARN-2498 is targeting to support preemption respect node labels, but we have 
> some gaps in code base, like queues/FiCaScheduler should be able to get 
> usedResource/pendingResource, etc. by label. These items potentially need to 
> refactor CS which we need spend some time carefully think about.
> For now, what immediately we can do is allow calculate ideal_allocation and 
> preempt containers only for resources on nodes without labels, to avoid 
> regression like: A cluster has some nodes with labels and some not, assume 
> queueA isn't satisfied for resource without label, but for now, preemption 
> policy may preempt resource from nodes with labels for queueA, that is not 
> correct.
> Again, it is just a short-term enhancement, YARN-2498 will consider 
> preemption respecting node-labels for Capacity Scheduler which is our final 
> target. 



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