See <https://builds.apache.org/job/kafka-2.1-jdk8/225/display/redirect?page=changes>
- Build failed in Jenkins: kafka-2.1-jdk8 #222 Apache Jenkins Server
- Build failed in Jenkins: kafka-2.1-jdk8 #223 Apache Jenkins Server
- Build failed in Jenkins: kafka-2.1-jdk8 #22... Apache Jenkins Server
- Jenkins build is back to normal : kafka... Apache Jenkins Server
