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https://issues.apache.org/jira/browse/MAPREDUCE-5446?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13729589#comment-13729589
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Kihwal Lee commented on MAPREDUCE-5446:
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+1 the patch looks good.
> TestJobHistoryEvents and TestJobHistoryParsing have race conditions
> -------------------------------------------------------------------
>
> Key: MAPREDUCE-5446
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5446
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2, test
> Affects Versions: 2.1.0-beta
> Reporter: Jason Lowe
> Assignee: Jason Lowe
> Attachments: MAPREDUCE-5446.patch
>
>
> TestJobHistoryEvents and TestJobHistoryParsing are not properly waiting for
> MRApp to finish. Currently they are polling the service state looking for
> Service.STATE.STOPPED, but the service can appear to be in that state
> *before* it is fully stopped. This causes tests to finish with MRApp threads
> still in-flight, and those threads can conflict with subsequent tests when
> they collide in the filesystem.
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