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https://issues.apache.org/jira/browse/HADOOP-12589?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15023082#comment-15023082
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Chris Nauroth commented on HADOOP-12589:
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Jenkins will execute a single pre-commit run at a time on each of its nodes.
During the pre-commit run, Surefire will start multiple processes to run JUnit
tests in parallel.
I'd prefer if we could move ahead with individual test fixes instead of turning
off parallel execution. We get a big performance boost from the
parallelization (~45 minutes to run tests in a single process down to ~15
minutes with parallel execution as I recall). Turning it off now would lower
our bandwidth for executing pre-commit runs.
> Fix intermittent test failure of TestCopyPreserveFlag
> ------------------------------------------------------
>
> Key: HADOOP-12589
> URL: https://issues.apache.org/jira/browse/HADOOP-12589
> Project: Hadoop Common
> Issue Type: Bug
> Components: test
> Environment: jenkins
> Reporter: Tsuyoshi Ozawa
>
> Found this issue on HADOOP-11149.
> {quote}
> Tests run: 8, Failures: 0, Errors: 8, Skipped: 0, Time elapsed: 0.949 sec <<<
> FAILURE! - in org.apache.hadoop.fs.shell.TestCopyPreserveFlag
> testDirectoryCpWithP(org.apache.hadoop.fs.shell.TestCopyPreserveFlag) Time
> elapsed: 0.616 sec <<< ERROR!
> java.io.IOException: Mkdirs failed to create d0 (exists=false,
> cwd=/testptch/hadoop/hadoop-common-project/hadoop-common/target/test/data/2/testStat)
> at
> org.apache.hadoop.fs.ChecksumFileSystem.create(ChecksumFileSystem.java:449)
> at
> org.apache.hadoop.fs.ChecksumFileSystem.create(ChecksumFileSystem.java:435)
> at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:913)
> at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:894)
> at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:856)
> at org.apache.hadoop.fs.FileSystem.createNewFile(FileSystem.java:1150)
> at
> org.apache.hadoop.fs.shell.TestCopyPreserveFlag.initialize(TestCopyPreserveFlag.java:72)
> {quote}
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