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From "Andrey Stepachev (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-2145) FairScheduler can assign more resources to queue with MaxShare set.
Date Wed, 11 Jun 2014 12:41:01 GMT
Andrey Stepachev created YARN-2145:
--------------------------------------

             Summary: FairScheduler can assign more resources to queue with MaxShare set.
                 Key: YARN-2145
                 URL: https://issues.apache.org/jira/browse/YARN-2145
             Project: Hadoop YARN
          Issue Type: Bug
          Components: fairscheduler
            Reporter: Andrey Stepachev
         Attachments: YARN-2145.diff

method fair.FSQueue#assignContainerPreCheck() uses Resources.fitsIn incorrectly, because if
queue is at it maximum method returns true and container can be assigned to queue with maximum
resources consumed.
That is because fetsIn code do <= comparison and if allocated resources == max resources
fitsIn still returns true, and consequently pre check successes and node have been assigned
to overloaded queue.
{code}
  public static boolean fitsIn(Resource smaller, Resource bigger) {
    return smaller.getMemory() <= bigger.getMemory() &&
        smaller.getVirtualCores() <= bigger.getVirtualCores();
  }
{code}



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