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https://issues.apache.org/jira/browse/YARN-3941?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14637993#comment-14637993
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Wangda Tan commented on YARN-3941:
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Looks good, +1. 

> Proportional Preemption policy should try to avoid sending duplicate 
> PREEMPT_CONTAINER event to scheduler
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-3941
>                 URL: https://issues.apache.org/jira/browse/YARN-3941
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacityscheduler
>    Affects Versions: 2.7.1
>            Reporter: Sunil G
>            Assignee: Sunil G
>         Attachments: 0001-YARN-3941.patch
>
>
> Currently ProportionalCPP tries to send multiple PREEMPT_CONTAINER events to 
> scheduler during every cycle of preemption check till the container is either 
> forcefully killed or preempted by AM. 
> This can be throttled from ProportionalPreemptionPolicy to avoid excess of 
> events to scheduler.



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