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From "Thomas Graves (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-270) RM scheduler event handler thread gets behind
Date Thu, 13 Dec 2012 18:58:13 GMT
Thomas Graves created YARN-270:
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             Summary: RM scheduler event handler thread gets behind
                 Key: YARN-270
                 URL: https://issues.apache.org/jira/browse/YARN-270
             Project: Hadoop YARN
          Issue Type: Bug
          Components: resourcemanager
    Affects Versions: 0.23.5
            Reporter: Thomas Graves


We had a couple of incidents on a 2800 node cluster where the RM scheduler event handler thread
got behind processing events and basically become unusable.  It was still processing apps,
but taking a long time (1 hr 45 minutes) to accept new apps.   this actually happened twice
within 5 days.

We are using the capacity scheduler and at the time had between 400 and 500 applications running.
 There were another 250 apps that were in the SUBMITTED state in the RM but the scheduler
hadn't processed those to put in pending state yet.  We had about 15 queues none of them hierarchical.
 We also had plenty of space lefts on the cluster.

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