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https://issues.apache.org/jira/browse/YARN-713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13678263#comment-13678263
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Maysam Yabandeh commented on YARN-713:
--------------------------------------

Thanks [~tgraves]. The changes of this patch is more or less the same of the 
changes applied at MAPREDUCE-4295. The updates were lost during the merge of an 
outdated patch in YARN-39. I am submitting the patch to get some reviews.
                
> ResourceManager can exit unexpectedly if DNS is unavailable
> -----------------------------------------------------------
>
>                 Key: YARN-713
>                 URL: https://issues.apache.org/jira/browse/YARN-713
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.1.0-beta
>            Reporter: Jason Lowe
>            Assignee: Maysam Yabandeh
>            Priority: Critical
>         Attachments: YARN-713.patch, YARN-713.patch
>
>
> As discussed in MAPREDUCE-5261, there's a possibility that a DNS outage could 
> lead to an unhandled exception in the ResourceManager's AsyncDispatcher, and 
> that ultimately would cause the RM to exit.  The RM should not exit during 
> DNS hiccups.

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