Karthik Kambatla updated YARN-2814:
    Attachment: yarn-2814-0.patch

yarn-2814-0.patch is a preview of what I was thinking. It removes RMFatalEvent* 
and associated code and cleans up a few other methods in the RM.

The dispatcher, I believe, can be moved to RMActiveServices. Will update the 
patch again post that investigation. 

Welcome any early feedback. 

> RM: Clean-up the handling of "fatal" events
> -------------------------------------------
>                 Key: YARN-2814
>                 URL: https://issues.apache.org/jira/browse/YARN-2814
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: resourcemanager
>    Affects Versions: 2.6.0
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>         Attachments: yarn-2814-0.patch
> YARN-2579 fixes a critical issue around handling fatal events in the RM, but 
> does so minimally. This JIRA is to follow through that approach and do more 
> clean-up.

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