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https://issues.apache.org/jira/browse/YARN-1913?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14014422#comment-14014422
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Wei Yan commented on YARN-1913:
-------------------------------
Update a new patch to fix Sandy's comments.
[~ashwinshankar77], if the leaf queue is not configured, the default AM
resource limit is (leaf_queue_fair_share * 1.0f), still limited by its fair
share.
> With Fair Scheduler, cluster can logjam when all resources are consumed by AMs
> ------------------------------------------------------------------------------
>
> Key: YARN-1913
> URL: https://issues.apache.org/jira/browse/YARN-1913
> Project: Hadoop YARN
> Issue Type: Bug
> Components: scheduler
> Affects Versions: 2.3.0
> Reporter: bc Wong
> Assignee: Wei Yan
> Attachments: YARN-1913.patch, YARN-1913.patch, YARN-1913.patch,
> YARN-1913.patch, YARN-1913.patch, YARN-1913.patch
>
>
> It's possible to deadlock a cluster by submitting many applications at once,
> and have all cluster resources taken up by AMs.
> One solution is for the scheduler to limit resources taken up by AMs, as a
> percentage of total cluster resources, via a "maxApplicationMasterShare"
> config.
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