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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-3485) FairScheduler headroom calculation doesn't consider maxResources for Fifo and FairShare policies
Date Tue, 14 Apr 2015 19:28:59 GMT
Karthik Kambatla created YARN-3485:
--------------------------------------

             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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