Eric Payne updated YARN-3769:
    Attachment: YARN-3769-branch-2.6.001.patch

Attaching {{YARN-3769-branch-2.6.001.patch}} for backport to branch-2.6.

TestLeafQueue unit test for multiple apps by multiple users had to be modified 
specifically to allow for all apps to be active at the same time since the way 
active apps is calculated is different between 2.6 and 2.7.

> Consider user limit when calculating total pending resource for preemption 
> policy in Capacity Scheduler
> -------------------------------------------------------------------------------------------------------
>                 Key: YARN-3769
>                 URL: https://issues.apache.org/jira/browse/YARN-3769
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacityscheduler
>    Affects Versions: 2.6.0, 2.7.0, 2.8.0
>            Reporter: Eric Payne
>            Assignee: Eric Payne
>             Fix For: 2.7.3
>         Attachments: YARN-3769-branch-2.002.patch, 
> YARN-3769-branch-2.6.001.patch, YARN-3769-branch-2.7.002.patch, 
> YARN-3769-branch-2.7.003.patch, YARN-3769-branch-2.7.005.patch, 
> YARN-3769-branch-2.7.006.patch, YARN-3769-branch-2.7.007.patch, 
> YARN-3769.001.branch-2.7.patch, YARN-3769.001.branch-2.8.patch, 
> YARN-3769.003.patch, YARN-3769.004.patch, YARN-3769.005.patch
> We are seeing the preemption monitor preempting containers from queue A and 
> then seeing the capacity scheduler giving them immediately back to queue A. 
> This happens quite often and causes a lot of churn.

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