Rohith Sharma K S commented on YARN-261:

Updated the issue description as per the patch implementation.

> Ability to fail AM attempts
> ---------------------------
>                 Key: YARN-261
>                 URL: https://issues.apache.org/jira/browse/YARN-261
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: api
>    Affects Versions: 2.0.3-alpha
>            Reporter: Jason Lowe
>            Assignee: Rohith Sharma K S
>         Attachments: 0001-YARN-261.patch, 0002-YARN-261.patch, 
> YARN-261--n2.patch, YARN-261--n3.patch, YARN-261--n4.patch, 
> YARN-261--n5.patch, YARN-261--n6.patch, YARN-261--n7.patch, YARN-261.patch
> It would be nice if clients could ask for an AM attempt to be killed.  This 
> is analogous to the task attempt kill support provided by MapReduce.
> This feature would be useful in a scenario where AM retries are enabled, the 
> AM supports recovery, and a particular AM attempt is stuck.  Currently if 
> this occurs the user's only recourse is to kill the entire application, 
> requiring them to resubmit a new application and potentially breaking 
> downstream dependent jobs if it's part of a bigger workflow.  Killing the 
> attempt would allow a new attempt to be started by the RM without killing the 
> entire application, and if the AM supports recovery it could potentially save 
> a lot of work.  It could also be useful in workflow scenarios where the 
> failure of the entire application kills the workflow, but the ability to kill 
> an attempt can keep the workflow going if the subsequent attempt succeeds.

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