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https://issues.apache.org/jira/browse/YARN-2314?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14071018#comment-14071018
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Li Lu commented on YARN-2314:
-----------------------------

Thanks [~jlowe]! About the corner case, I'm wondering whether a bounded time 
waiting would be slightly better than waiting? In that way if a certain timeout 
is triggered then it means all RPCs are occupied for a really long time, and 
the system could report this abnormal situation. 

> ContainerManagementProtocolProxy can create thousands of threads for a large 
> cluster
> ------------------------------------------------------------------------------------
>
>                 Key: YARN-2314
>                 URL: https://issues.apache.org/jira/browse/YARN-2314
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 2.1.0-beta
>            Reporter: Jason Lowe
>            Priority: Critical
>         Attachments: nmproxycachefix.prototype.patch
>
>
> ContainerManagementProtocolProxy has a cache of NM proxies, and the size of 
> this cache is configurable.  However the cache can grow far beyond the 
> configured size when running on a large cluster and blow AM address/container 
> limits.  More details in the first comment.



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