See <https://builds.apache.org/job/kafka-trunk-jdk7/1616/changes>
- Build failed in Jenkins: kafka-trunk-jdk7 #1611 Apache Jenkins Server
- Build failed in Jenkins: kafka-trunk-jdk7 #1612 Apache Jenkins Server
- Build failed in Jenkins: kafka-trunk-jdk7 #... Apache Jenkins Server
- Build failed in Jenkins: kafka-trunk-jd... Apache Jenkins Server
- Build failed in Jenkins: kafka-trun... Apache Jenkins Server
- Jenkins build is back to norma... Apache Jenkins Server
