See <https://builds.apache.org/job/Log4j%202.x/3168/display/redirect?page=changes>
- Build failed in Jenkins: Log4j 2.x #3166 Apache Jenkins Server
- Build failed in Jenkins: Log4j 2.x #3167 Apache Jenkins Server
- Jenkins build is unstable: Log4j 2.x #3168 Apache Jenkins Server
- Jenkins build is still unstable: Log4j ... Apache Jenkins Server
- Jenkins build is still unstable: Lo... Apache Jenkins Server
- Jenkins build is back to stabl... Apache Jenkins Server
