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Posted to yarn-issues@hadoop.apache.org by "Karthik Kambatla (JIRA)" <ji...@apache.org> on 2015/04/14 21:28:59 UTC

[jira] [Created] (YARN-3485) FairScheduler headroom calculation doesn't consider maxResources for Fifo and FairShare policies

Karthik Kambatla created YARN-3485:
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             Summary: FairScheduler headroom calculation doesn't consider maxResources for Fifo and FairShare policies
                 Key: YARN-3485
                 URL: https://issues.apache.org/jira/browse/YARN-3485
             Project: Hadoop YARN
          Issue Type: Bug
          Components: fairscheduler
    Affects Versions: 2.7.0
            Reporter: Karthik Kambatla
            Assignee: Karthik Kambatla
            Priority: Critical


FairScheduler's headroom calculations consider the fairshare and cluster-available-resources, and the fairshare has maxResources. However, for Fifo and Fairshare policies, the fairshare is used only for memory and not cpu. So, the scheduler ends up showing a higher headroom than is actually available. This could lead to applications waiting for resources far longer than then intend to. e.g. MAPREDUCE-6302.



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