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https://issues.apache.org/jira/browse/YARN-5731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16081895#comment-16081895
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Sunil G commented on YARN-5731:
-------------------------------
Test case failures seems related.
I think since we enable this flag, we might miss one container to preempt. May
be we need to recheck these test cases, thoughts?
> Preemption does not work in few corner cases when reservations are placed
> -------------------------------------------------------------------------
>
> Key: YARN-5731
> URL: https://issues.apache.org/jira/browse/YARN-5731
> Project: Hadoop YARN
> Issue Type: Bug
> Components: capacity scheduler
> Affects Versions: 2.8.0
> Reporter: Sunil G
> Assignee: Sunil G
> Attachments: YARN-5731-branch-2.8.001.patch
>
>
> Preemption doesnt kick in under below scenario.
> Two queues A and B each with 50% capacity and 100% maximum capacity and user
> limit factor 2. Job which is submitted to queueA has taken 95% of resources
> in cluster. Remaining 5% was also reserved by same job as demand was still
> higher.
> Now submit a small job with AM container size is lesser to above mentioned
> 5%. Job waits and no preemption is happening.
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