Robert Kanter updated YARN-3842:
    Attachment: YARN-3842.001.patch

That makes sense.  The patch is also a lot simpler; it just adds a retry policy 
for {{NMNotYetReadyException}}, and a test.

> NM restarts could lead to app failures
> --------------------------------------
>                 Key: YARN-3842
>                 URL: https://issues.apache.org/jira/browse/YARN-3842
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.7.0
>            Reporter: Karthik Kambatla
>            Assignee: Robert Kanter
>            Priority: Critical
>         Attachments: MAPREDUCE-6409.001.patch, MAPREDUCE-6409.002.patch, 
> YARN-3842.001.patch
> Consider the following scenario:
> 1. RM assigns a container on node N to an app A.
> 2. Node N is restarted
> 3. A tries to launch container on node N.
> 3 could lead to an NMNotYetReadyException depending on whether NM N has 
> registered with the RM. In MR, this is considered a task attempt failure. A 
> few of these could lead to a task/job failure.

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