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https://issues.apache.org/jira/browse/YARN-540?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13759401#comment-13759401
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Vinod Kumar Vavilapalli commented on YARN-540:
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Hehe, race conditions :)
bq. Ah, after the RM restarts, the NM can notify the RM that the AM container
exited then that would pretty much fix it.
Interesting. Then RM will also need to *somehow* remember that unregister came
in but the state-store app removal isn't done. Which is not possible without
more state-store writes?
> 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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