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https://issues.apache.org/jira/browse/YARN-2025?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14223993#comment-14223993
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Tsuyoshi OZAWA commented on YARN-2025:
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Thanks for your point, [~rohithsharma]. I'll take a look.
> Possible NPE in schedulers#addApplicationAttempt()
> --------------------------------------------------
>
> Key: YARN-2025
> URL: https://issues.apache.org/jira/browse/YARN-2025
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Tsuyoshi OZAWA
> Assignee: Tsuyoshi OZAWA
> Attachments: YARN-2025.1.patch
>
>
> In FifoScheduler/FairScheduler/CapacityScheduler#addApplicationAttempt(), we
> don't check whether {{application}} is null. This can cause NPE in following
> sequences: addApplication() -> doneApplication() (e.g. AppKilledTransition)
> -> addApplicationAttempt().
> {code}
> SchedulerApplication application =
> applications.get(applicationAttemptId.getApplicationId());
> String user = application.getUser();
> {code}
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