See <https://builds.apache.org/job/kafka-trunk-jdk9/218/display/redirect?page=changes>
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- Build failed in Jenkins: kafka-trunk-jdk9 #215 Apache Jenkins Server
- Build failed in Jenkins: kafka-trunk-jdk9 #... Apache Jenkins Server
- Build failed in Jenkins: kafka-trunk-jd... Apache Jenkins Server
- Jenkins build is back to normal : k... Apache Jenkins Server
