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https://issues.apache.org/jira/browse/SUREFIRE-1614?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17097927#comment-17097927
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Tibor Digana commented on SUREFIRE-1614:
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[~kriegaex] It's not a problem of Surefire. It is the problem of the agent.
Check it out with 3.0.0-SNAPSHOT and [configure the
ForkNode|https://github.com/apache/maven-surefire/blob/master/maven-surefire-plugin/src/site/apt/examples/process-communication.vm]
or wait for 3.0.0-M5 but still you have to configure the TCP communication in
the plugin. We don't want to switch to TCP immediately. We want to make it
smooth and we will switch to it in some later version.
> 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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