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Posted to yarn-issues@hadoop.apache.org by "Arun C Murthy (JIRA)" <ji...@apache.org> on 2012/10/23 00:18:12 UTC
[jira] [Updated] (YARN-177) CapacityScheduler - adding a queue
while the RM is running has wacky results
[ https://issues.apache.org/jira/browse/YARN-177?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Arun C Murthy updated YARN-177:
-------------------------------
Attachment: YARN-177.patch
Good catch Tom, here is a simple fix. I'll test some more and add some unit tests.
> 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
>
>
> 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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