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https://issues.apache.org/jira/browse/SUREFIRE-1255?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15449411#comment-15449411
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Maximilian Michels commented on SUREFIRE-1255:
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I didn't get what Surefire does but I'm assuming it just wraps the standard out
and parses and removes its messages from the stdout stream.
log4j doesn't appear to change the standard out:
https://github.com/search?l=&q=setOut+repo%3Aapache%2Flog4j&ref=advsearch&type=Code&utf8=%E2%9C%93
Further, if you look at {{ConsoleAppender}} you'll see that it just prints to
System.out but never replaces it.
> Surefire 2.19.1 hangs before starting test execution
> ----------------------------------------------------
>
> Key: SUREFIRE-1255
> URL: https://issues.apache.org/jira/browse/SUREFIRE-1255
> Project: Maven Surefire
> Issue Type: Bug
> Components: Maven Surefire Plugin, process forking
> Affects Versions: 2.19.1
> Reporter: Maximilian Michels
> Assignee: Tibor Digana
> Priority: Critical
>
> Seeing the same error as SUREFIRE-1193 in Apache Flink builds after upgrading
> from 2.18.1 to 2.19.1. No errors, builds just gets stuck at the beginning of
> tests with no log output from the test itself, e.g.
> https://s3.amazonaws.com/archive.travis-ci.org/jobs/137118454/log.txt
> After a couple of minutes Surefire reports
> {noformat}
> [ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-surefire-plugin:2.19.1:test
> (integration-tests) on project flink-scala-shell_2.10: ExecutionException The
> forked VM terminated without properly saying goodbye. VM crash or System.exit
> called?
> [ERROR] Command was /bin/sh -c cd
> /home/travis/build/mxm/flink/flink-scala-shell/target &&
> /usr/lib/jvm/java-8-oracle/jre/bin/java -Xms256m -Xmx800m -Dmvn.forkNumber=1
> -XX:-UseGCOverheadLimit -jar
> /home/travis/build/mxm/flink/flink-scala-shell/target/surefire/surefirebooter372520169616801479.jar
>
> /home/travis/build/mxm/flink/flink-scala-shell/target/surefire/surefire8229439069544382018tmp
>
> /home/travis/build/mxm/flink/flink-scala-shell/target/surefire/surefire_26373613144387982724tmp
> [ERROR] -> [Help 1]
> {noformat}
> We have a a couple of test classes that suffer from this problem. Tests don't
> read from STDIN or replace it. Switching back to 2.18.1 eliminates the
> problem (Ran over 100 builds). It seems to be a race condition because it
> only occurs every once in a while, i.e. ~ 2 out of 10 builds on Travis. I
> haven't been able to reproduce the problem locally.
> More logs:
> https://s3.amazonaws.com/flink-logs-us/travis-artifacts/mxm/flink/849/849.1.tar.gz
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