Jason Lowe created YARN-3238:

             Summary: 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
            Priority: Blocker

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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