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https://issues.apache.org/jira/browse/MAPREDUCE-4980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16129542#comment-16129542
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Jason Lowe commented on MAPREDUCE-4980:
---------------------------------------
Thanks a ton for pushing this forward, Allen!
I wasn't able to reproduce the TestNNBench failure locally, but I did run into
a lot of other failures. Still digging through them, but a lot appear to be
due to mini clusters colliding in the local filesystem. For example:
{noformat}
$ grep -l
'hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/target/test-dir/1/dfs/name-0-1
has been successfully formatted' target/surefire-reports/*-output.txt
target/surefire-reports/org.apache.hadoop.conf.TestNoDefaultsJobConf-output.txt
target/surefire-reports/org.apache.hadoop.mapred.TestJobName-output.txt
target/surefire-reports/org.apache.hadoop.mapred.TestLazyOutput-output.txt
target/surefire-reports/org.apache.hadoop.mapred.TestMiniMRChildTask-output.txt
target/surefire-reports/org.apache.hadoop.mapred.TestMiniMRClasspath-output.txt
target/surefire-reports/org.apache.hadoop.mapred.TestMiniMRWithDFSWithDistinctUsers-output.txt
target/surefire-reports/org.apache.hadoop.mapreduce.lib.join.TestJoinDatamerge-output.txt
target/surefire-reports/org.apache.hadoop.mapreduce.TestMRJobClient-output.txt
target/surefire-reports/org.apache.hadoop.mapreduce.v2.TestUberAM-output.txt
{noformat}
Looks like lots of things want to scribble on the same areas in target/test-dir.
> 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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