See <https://builds.apache.org/job/River-trunk/513/changes>
- Jenkins build became unstable: River-trunk #509 Apache Jenkins Server
- Jenkins build is still unstable: River-trunk #5... Apache Jenkins Server
- Jenkins build is still unstable: River-trun... Apache Jenkins Server
- Build failed in Jenkins: River-trunk #5... Apache Jenkins Server
- Jenkins build is back to normal : R... Apache Jenkins Server
