See <https://builds.apache.org/job/kafka-trunk-jdk7/1686/changes>
- Build failed in Jenkins: kafka-trunk-jdk7 #1683 Apache Jenkins Server
- Build failed in Jenkins: kafka-trunk-jdk7 #1684 Apache Jenkins Server
- Build failed in Jenkins: kafka-trunk-jdk7 #... Apache Jenkins Server
- Jenkins build is back to normal : kafka... Apache Jenkins Server
