Wei Yan commented on YARN-1913:

Thanks, Sandy. Will update a patch.

> 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
> 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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