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https://issues.apache.org/jira/browse/MAPREDUCE-4980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16128981#comment-16128981
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Allen Wittenauer commented on MAPREDUCE-4980:
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Other than what are "wait enough time" problems (and that's just a matter of
tuning), the only test that really seems troublesome is TestNNBench.
If I run at -DtestThreadCount=8, I can break this test consistently. I'm
completely stumped as to why though. Whichever test runs second fails the
create_write assert.
> Parallel test execution of hadoop-mapreduce-client-core
> -------------------------------------------------------
>
> Key: MAPREDUCE-4980
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4980
> Project: Hadoop Map/Reduce
> Issue Type: Test
> Components: test
> Affects Versions: 3.0.0-alpha1
> Reporter: Tsuyoshi Ozawa
> Assignee: Andrey Klochkov
> Attachments: MAPREDUCE-4980.010.patch, MAPREDUCE-4980.011.patch,
> MAPREDUCE-4980.012.patch, MAPREDUCE-4980.1.patch, MAPREDUCE-4980--n3.patch,
> MAPREDUCE-4980--n4.patch, MAPREDUCE-4980--n5.patch, MAPREDUCE-4980--n6.patch,
> MAPREDUCE-4980--n7.patch, MAPREDUCE-4980--n7.patch, MAPREDUCE-4980--n8.patch,
> MAPREDUCE-4980.patch
>
>
> The maven surefire plugin supports parallel testing feature. By using it, the
> tests can be run more faster.
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