See <https://builds.apache.org/job/beam_Release_NightlySnapshot/672/display/redirect?page=changes>
- Jenkins build became unstable: beam_Release_Nightly... Apache Jenkins Server
- Jenkins build is still unstable: beam_Release_N... Apache Jenkins Server
- Build failed in Jenkins: beam_Release_Night... Apache Jenkins Server
- Build failed in Jenkins: beam_Release_N... Apache Jenkins Server
- Jenkins build is back to normal : b... Apache Jenkins Server