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From "Thomas Graves (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-177) CapacityScheduler - adding a queue while the RM is running has wacky results
Date Tue, 23 Oct 2012 14:51:14 GMT

    [ https://issues.apache.org/jira/browse/YARN-177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13482368#comment-13482368
] 

Thomas Graves commented on YARN-177:
------------------------------------

well I guess I didn't fix it.  The issue is we are inconsistent about synchronizing around
the parent usage. 
                
> 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: Arun C Murthy
>            Priority: Critical
>             Fix For: 2.0.3-alpha, 0.23.5
>
>         Attachments: YARN-177.patch, YARN-177.patch
>
>
> 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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