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https://issues.apache.org/jira/browse/SUREFIRE-1614?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Christian Stein reassigned SUREFIRE-1614:
-----------------------------------------
Assignee: Christian Stein
> 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
> Attachments: surefire-stream-corruption-bug.zip
>
>
> 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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