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https://issues.apache.org/jira/browse/YARN-4066?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14704320#comment-14704320
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Arun Suresh commented on YARN-4066:
-----------------------------------
[~johang], Thanks for reporting this... I don't think the patch has been
successfully uploaded though. Kindly re-attach.
> Large number of queues choke fair scheduler
> -------------------------------------------
>
> Key: YARN-4066
> URL: https://issues.apache.org/jira/browse/YARN-4066
> Project: Hadoop YARN
> Issue Type: Bug
> Components: fairscheduler
> Affects Versions: 2.7.1
> Reporter: Johan Gustavsson
>
> Due to synchronization and all the loops performed during queue creation,
> setting a large amount of queues (12000+) will completely choke the
> scheduler. To deal with this some optimization to
> "QueueManager.updateAllocationConfiguration(AllocationConfiguration
> queueConf)" should be done to reduce the amount of unnesecary loops. The
> attached patch have been tested to work with atleast 96000 queues.
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