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From "Thomas Graves (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-399) Add an out of band heartbeat damper
Date Tue, 12 Feb 2013 16:39:13 GMT
Thomas Graves created YARN-399:

             Summary: Add an out of band heartbeat damper
                 Key: YARN-399
                 URL: https://issues.apache.org/jira/browse/YARN-399
             Project: Hadoop YARN
          Issue Type: Bug
          Components: nodemanager
    Affects Versions: 0.23.6
            Reporter: Thomas Graves
            Assignee: Thomas Graves

We are seeing issues with the scheduler queue backing up on the RM. We have the nodemanager
heartbeats set at 5 seconds which should be more then long enough for the number of apps we
are running.  We believe this is due to the out of band heartbeats of the nodemanager coming
to soon when we have jobs with lots of containers that finish quickly.

To help with that we could add an out of band heartbeat damper to the nodemanager similar
to what 1.X Tasktrackers have.  MAPREDUCE-2355 added it in 1.x.

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