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https://issues.apache.org/jira/browse/SUREFIRE-1614?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17098526#comment-17098526
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Tibor Digana commented on SUREFIRE-1614:
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[~kriegaex]
>> Surefire definitely is running before, spawning off the JVM target process
These are two different things. The plugin process has different logging
targets than the Surefire JVM logger.
The plugin does not use your agent, and that's very different. The plugin is
logging the received messages coming from the events sent by the surefire JVM.
ok, it looks like we agreed and we understand all principles, the issue was
reported in SUREFIRE-1788 and the work will be finished in {{3.0.0-M5}} release.
> JUnit Runner that writes to System.out corrupts Surefire's STDOUT when using
> JUnit's Vintage Engine
> ---------------------------------------------------------------------------------------------------
>
> Key: SUREFIRE-1614
> URL: https://issues.apache.org/jira/browse/SUREFIRE-1614
> Project: Maven Surefire
> Issue Type: Bug
> Components: JUnit 5.x support
> Affects Versions: 2.22.1, 3.0.0-M2
> Reporter: Andy Wilkinson
> Assignee: Christian Stein
> Priority: Major
> Fix For: 2.22.2, 3.0.0-M3
>
> Attachments: surefire-stream-corruption-bug.zip
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> When JUnit Jupiter's Vintage Engine is used to run tests written using the
> JUnit 4 API, output to the console from a {{TestRunner}} results in
> Surefire's STDOUT being corrupted:
> {noformat}
> [WARNING] Corrupted STDOUT by directly writing to native stream in forked JVM
> 1. See FAQ web page and the dump file […]{noformat}
> Note that the test runner is simply calling {{System.out}}. This is to
> simulate the real world setup where the runner performs some logging that
> ultimately results in a console appender calling {{System.out}}. The same
> arrangement does not cause a problem when run using JUnit 4. An initial
> investigation suggests that the Vintage Engine calls the custom
> {{TestRunner}} earlier and, it would appear, at a time when Surefire cannot
> tolerate output to {{System.out}}.
> I have attached a minimal project that reproduces the problem. Running
> {{./mvnw -Pjunit5 test}} will reproduce the corruption. Running {{./mvnw
> -Pjunit4 test}} will not.
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