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https://issues.apache.org/jira/browse/YARN-4968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15388022#comment-15388022
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Junping Du commented on YARN-4968:
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The same issue also happens in
TestRMRestart#testRMRestartWaitForPreviousAMToFinish. Filed YARN-5416 to fix it.
> A couple of AM retry unit tests need to wait SchedulerApplicationAttempt
> stopped.
> ---------------------------------------------------------------------------------
>
> Key: YARN-4968
> URL: https://issues.apache.org/jira/browse/YARN-4968
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Wangda Tan
> Assignee: Wangda Tan
> Fix For: 2.9.0
>
> Attachments: YARN-4968.1.patch
>
>
> Noticed some unit tests, for example:
> TestRMRestart#testRMRestartAfterPreemption
> TestAMRestart#testShouldNotCountFailureToMaxAttemptRetry
> Sometimes failure because retrying app attempt registers before the previous
> scheduler-application-attempt completely completed in scheduler.
> We need to wait scheduler-application-attempt stop before retrying following
> attempts.
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