See <https://builds.apache.org/job/kafka-trunk-jdk7/2663/display/redirect?page=changes>
- Build failed in Jenkins: kafka-trunk-jdk7 #2660 Apache Jenkins Server
- Build failed in Jenkins: kafka-trunk-jdk7 #2661 Apache Jenkins Server
- Build failed in Jenkins: kafka-trunk-jdk7 #... Apache Jenkins Server
- Jenkins build is back to normal : kafka... Apache Jenkins Server
