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https://issues.apache.org/jira/browse/HADOOP-11984?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14559914#comment-14559914
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Chris Nauroth commented on HADOOP-11984:
----------------------------------------
Ah-ha! There is our root cause:
{code}
[exec] Running mkdir test.build.data:
/home/jenkins/jenkins-slave/workspace/PreCommit-HADOOP-Build/hadoop-common-project/hadoop-common/target/test/data/{1..4}
test.build.dir:
/home/jenkins/jenkins-slave/workspace/PreCommit-HADOOP-Build/hadoop-common-project/hadoop-common/target/test-dir/{1..4}
hadoop.tmp.dir:
/home/jenkins/jenkins-slave/workspace/PreCommit-HADOOP-Build/hadoop-common-project/hadoop-common/target/test/{1..4}
{code}
It looks like Jenkins (and only Jenkins so far) is running a shell that isn't
expanding {{\{1..4\}}} in the loop. I don't have enough historical shell
knowledge here to know if only certain shells promise support for this syntax.
I suppose I could change this to call {{seq}}, which is part of coreutils, but
then I don't really know the portability promises on that one either.
[~aw], can I get some advice from you? What would be the most portable way to
write the following kind of loop?
{code}
for i in {1..4}; do mkdir -p myDirectory/$i; done
{code}
> Enable parallel JUnit tests in pre-commit.
> ------------------------------------------
>
> Key: HADOOP-11984
> URL: https://issues.apache.org/jira/browse/HADOOP-11984
> Project: Hadoop Common
> Issue Type: Improvement
> Components: build, scripts, test
> Reporter: Chris Nauroth
> Assignee: Chris Nauroth
> Attachments: HADOOP-11984.001.patch, HADOOP-11984.002.patch,
> HADOOP-11984.003.patch, HADOOP-11984.004.patch, HADOOP-11984.005.patch,
> HADOOP-11984.006.patch, HADOOP-11984.007.patch, HADOOP-11984.008.patch,
> HADOOP-11984.009.patch, HADOOP-11984.010.patch, HADOOP-11984.011.patch
>
>
> HADOOP-9287 and related issues implemented the parallel-tests Maven profile
> for running JUnit tests in multiple concurrent processes. This issue
> proposes to activate that profile during pre-commit to speed up execution.
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