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https://issues.apache.org/jira/browse/SUREFIRE-1725?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Tibor Digana closed SUREFIRE-1725.
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Resolution: Fixed
https://gitbox.apache.org/repos/asf?p=maven-surefire.git;a=commit;h=acf7733a798359c6570a194fd21951eae9b0d7ab
> Surefire in JUnit Vintage mode distributes tests very unevenly between forks,
> causing poor parallelism
> ------------------------------------------------------------------------------------------------------
>
> Key: SUREFIRE-1725
> URL: https://issues.apache.org/jira/browse/SUREFIRE-1725
> Project: Maven Surefire
> Issue Type: Bug
> Components: Junit 4.x support, JUnit 5.x support, Maven Surefire
> Plugin
> Affects Versions: 3.0.0-M3
> Reporter: Gareth Daniel Smith
> Assignee: Tibor Digana
> Priority: Major
> Fix For: 3.0.0-M5
>
> Attachments: junit-5-vintage-bug.zip
>
>
> To reproduce this issue, please run the attached test case using {{mvn clean
> verify}}
> You will see output similar to the following:
> {code:java}
> [INFO] T E S T S
> [INFO] -------------------------------------------------------
> [INFO] Running My7Test
> Test in process 32569
> [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.017
> s - in My7Test
> [INFO] Running My9Test
> Test in process 32569
> [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.983
> s - in My9Test
> [INFO] Running My4Test
> Test in process 32569
> [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.998
> s - in My4Test
> [INFO] Running My8Test
> Test in process 32569
> [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.999
> s - in My8Test
> [INFO] Running My6Test
> Test in process 32569
> [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.001
> s - in My6Test
> [INFO] Running My1Test
> Test in process 32569
> [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1 s -
> in My1Test
> [INFO] Running My5Test
> Test in process 32569
> [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.999
> s - in My5Test
> [INFO] Running My3Test
> Test in process 32569
> [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.997
> s - in My3Test
> [INFO] Running My2Test
> Test in process 32569
> [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1 s -
> in My2Test
> [INFO] Running My0Test
> Test in process 32569
> [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.999
> s - in My0Test
> {code}
> Notice how all 10 tests are being run on the same process. This is wrong
> because there should be 5 forks - and the tests should be evenly distributed
> between them.
> If Junit4 is used instead of Junit5+vintage (see the commented dependency in
> pom.xml) then this issue does not occur (probably because Surefire uses a
> different code path in that case).
> Please note that this issue was originally logged against Junit
> ([https://github.com/junit-team/junit5/issues/2114)] - but they suggested the
> problem lies within surefire.
> Thanks for any help!
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