Wangda Tan commented on YARN-2314:

[~jlowe], thanks for update, patch looks good to me, +1!
[~rajesh.balamohan], thanks for your performance report based on this. 20-30ms 
is still a latency for interactive tasks cannot be totally ignored. At least, 
we have way to cache connections via configuration option in this patch.


> 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
>            Assignee: Jason Lowe
>            Priority: Critical
>         Attachments: YARN-2314.patch, YARN-2314v2.patch, 
> disable-cm-proxy-cache.patch, nmproxycachefix.prototype.patch, 
> tez-yarn-2314.xlsx
> 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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