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Posted to yarn-issues@hadoop.apache.org by "Daniel Templeton (JIRA)" <ji...@apache.org> on 2017/07/24 20:10:00 UTC

[jira] [Created] (YARN-6863) Fair Scheduler preemption thread should check that a container has the needed resources before adding it to the preemption list

Daniel Templeton created YARN-6863:
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             Summary: Fair Scheduler preemption thread should check that a container has the needed resources before adding it to the preemption list
                 Key: YARN-6863
                 URL: https://issues.apache.org/jira/browse/YARN-6863
             Project: Hadoop YARN
          Issue Type: Bug
          Components: fairscheduler
    Affects Versions: 3.0.0-alpha4
            Reporter: Daniel Templeton
            Priority: Minor


In {{FSPreemptionThread.identifyContainersToPreempt()}}, we add every container we encounter to the preemption list until we meet the desired target.  As we head into resource types, that behavior will become more of a problem, but it's technically an issue already because the fair scheduler supports requests with 0 vcores or 0 memory.



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