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https://issues.apache.org/jira/browse/SUREFIRE-1301?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15660197#comment-15660197
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Tibor Digana commented on SUREFIRE-1301:
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[~rraumberger]
You can open a pull request in GitHub and update project documentation:
https://github.com/apache/maven-surefire/blob/master/maven-surefire-plugin/src/site/apt/examples/fork-options-and-parallel-execution.apt.vm
and then I will release the documentation in Version 2.19.2.
> baseDir system-property gets overridden by other builder threads if forking
> is disabled
> ---------------------------------------------------------------------------------------
>
> Key: SUREFIRE-1301
> URL: https://issues.apache.org/jira/browse/SUREFIRE-1301
> Project: Maven Surefire
> Issue Type: Bug
> Components: Maven Surefire Plugin
> Affects Versions: 2.19.1
> Reporter: Richard Raumberger
> Priority: Minor
>
> When running tests in a multi-module project with multiple builder threads
> and surefire's forkCount set to 0, the threads override each other when
> setting the baseDir system-property.
> Running the [sample
> project|https://cloud.almost-a-blog.net/s/IHS63tBqowjhvBh/download] results
> in the below output with the given commands.
> (Note: First number is the expected path. e.g. 11 => wrapper1; module1)
> *Correct*
> {code}
> mvn clean install | grep basedir
> 01 basedir=<path>/maven-surefire-example/module1
> 02 basedir=<path>/maven-surefire-example/module2
> 03 basedir=<path>/maven-surefire-example/module3
> 11 basedir=<path>/maven-surefire-example/wrapper1/module1
> 12 basedir=<path>/maven-surefire-example/wrapper1/module2
> 13 basedir=<path>/maven-surefire-example/wrapper1/module3
> 21 basedir=<path>/maven-surefire-example/wrapper2/module1
> 22 basedir=<path>/maven-surefire-example/wrapper2/module2
> 23 basedir=<path>/maven-surefire-example/wrapper2/module3
> 31 basedir=<path>/maven-surefire-example/wrapper3/module1
> 32 basedir=<path>/maven-surefire-example/wrapper3/module2
> 33 basedir=<path>/maven-surefire-example/wrapper3/module3
> {code}
> *Incorrect*
> {code}
> mvn clean install -T 3 | grep basedir
> 02 basedir=<path>/maven-surefire-example/module2
> 01 basedir=<path>/maven-surefire-example/module2
> 03 basedir=<path>/maven-surefire-example/module2
> 13 basedir=<path>/maven-surefire-example/wrapper1/module1
> 23 basedir=<path>/maven-surefire-example/wrapper1/module1
> 11 basedir=<path>/maven-surefire-example/wrapper1/module1
> 12 basedir=<path>/maven-surefire-example/wrapper2/module2
> 21 basedir=<path>/maven-surefire-example/wrapper2/module2
> 22 basedir=<path>/maven-surefire-example/wrapper2/module2
> 32 basedir=<path>/maven-surefire-example/wrapper3/module3
> 31 basedir=<path>/maven-surefire-example/wrapper3/module3
> 33 basedir=<path>/maven-surefire-example/wrapper3/module3
> {code}
> This is correct behaviour from a technical point of view as the
> system-properties are shared between the threads and the surefire-executions
> (due to the disabled forking), therefore I opened this issue mainly for
> documentation purpose.
> This behaviour does not affect our current project anymore due to the removal
> of the forkCount setting, yet I think that this behaviour should be
> documented.
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