Xuan Gong commented on YARN-3238:

+1 LGTM. Will commit

> Connection timeouts to nodemanagers are retried at multiple levels
> ------------------------------------------------------------------
>                 Key: YARN-3238
>                 URL: https://issues.apache.org/jira/browse/YARN-3238
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.6.0
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>            Priority: Blocker
>         Attachments: YARN-3238.001.patch
> The IPC layer will retry connection timeouts automatically (see Client.java), 
> but we are also retrying them with YARN's RetryPolicy put in place when the 
> NM proxy is created.  This causes a two-level retry mechanism where the IPC 
> layer has already retried quite a few times (45 by default) for each YARN 
> RetryPolicy error that is retried.  The end result is that NM clients can 
> wait a very, very long time for the connection to finally fail.

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