[jira] [Created] (YARN-5731) Preemption does not work in few corner cases where reservations are placed

["Sunil G (JIRA)" <ji...@apache.org>]

Sunil G created YARN-5731:
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             Summary: Preemption does not work in few corner cases where 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: 2.7.3
            Reporter: Sunil G
            Assignee: Sunil G


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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