Log4j is getting periodic failures in Jenkins with the messages shown below. I am also seeing running the tests hang in various log4j modules when building on my MacBook Pro. The build never hung when using 2.18. We have reverted back to surefire 2.18 due to this.
The full build output is temporarily available at https://builds.apache.org/job/Log4j%202.x/1520/console. We only keep the last 15 builds.
ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.19:test (default-test) on project log4j-api: ExecutionException The forked VM terminated without properly saying goodbye. VM crash or System.exit called?
[ERROR] Command was /bin/sh -c cd "<https://builds.apache.org/job/Log4j%202.x/ws/log4j-api"> && /home/jenkins/jenkins-slave/tools/hudson.model.JDK/jdk-1.7u51/jre/bin/java -XX:MaxPermSize=512m -jar '<https://builds.apache.org/job/Log4j%202.x/ws/log4j-api/target/surefire/surefirebooter7073284324062596703.jar'> '<https://builds.apache.org/job/Log4j%202.x/ws/log4j-api/target/surefire/surefire9073033079471575703tmp'> '<https://builds.apache.org/job/Log4j%202.x/ws/log4j-api/target/surefire/surefire_84682619741166881372tmp'>
[ERROR] -> [Help 1]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn <goals> -rf :log4j-api
[JENKINS] Archiving <https://builds.apache.org/job/Log4j%202.x/ws/l