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https://issues.apache.org/jira/browse/YARN-540?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13759453#comment-13759453
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Bikas Saha commented on YARN-540:
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Most apps will not see the async API since they will use AMRMClient. MR AM will
see the async API since it use the low level API. Hence, we only need to change
the MR AM now. I would avoid making the call blocking now and non-blocking
later on since thats incompatible. In any case, it is orthogonal to solving the
problem. The problem being RM crashing before being able to remove the app from
the store.
> Race condition causing RM to potentially relaunch already unregistered AMs on
> RM restart
> ----------------------------------------------------------------------------------------
>
> Key: YARN-540
> URL: https://issues.apache.org/jira/browse/YARN-540
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager
> Reporter: Jian He
> Assignee: Jian He
> Attachments: YARN-540.1.patch, YARN-540.2.patch, YARN-540.3.patch,
> YARN-540.patch, YARN-540.patch
>
>
> When job succeeds and successfully call finishApplicationMaster, RM shutdown
> and restart-dispatcher is stopped before it can process REMOVE_APP event. The
> next time RM comes back, it will reload the existing state files even though
> the job is succeeded
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