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From "Thomas Graves (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-177) CapacityScheduler - adding a queue while the RM is running has wacky results
Date Mon, 22 Oct 2012 01:08:11 GMT
Thomas Graves created YARN-177:
----------------------------------

             Summary: CapacityScheduler - adding a queue while the RM is running has wacky
results
                 Key: YARN-177
                 URL: https://issues.apache.org/jira/browse/YARN-177
             Project: Hadoop YARN
          Issue Type: Bug
          Components: capacityscheduler
    Affects Versions: 0.23.3
            Reporter: Thomas Graves
            Assignee: Thomas Graves
            Priority: Critical


Adding a queue to the capacity scheduler while the RM is running and then running a job in
the queue added results in very strange behavior.  The cluster Total Memory can either decrease
or increase.  We had a cluster where total memory decreased to almost 1/6th the capacity.
Running on a small test cluster resulted in the capacity going up by simply adding a queue
and running wordcount.  

Looking at the RM logs, used memory can go negative but other logs show the number positive:


2012-10-21 22:56:44,796 [ResourceManager Event Processor] INFO org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue:
assignedContainer queue=root usedCapacity=0.0375 absoluteUsedCapacity=0.0375 used=memory:
7680 cluster=memory: 204800

2012-10-21 22:56:45,831 [ResourceManager Event Processor] INFO org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue:
completedContainer queue=root usedCapacity=-0.0225 absoluteUsedCapacity=-0.0225 used=memory:
-4608 cluster=memory: 204800

  

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