See <https://builds.apache.org/job/beam_Release_NightlySnapshot/changes>
- Jenkins build became unstable: beam_Release_Nightly... Apache Jenkins Server
- Jenkins build is still unstable: beam_Release_N... Apache Jenkins Server
- Jenkins build is still unstable: beam_Relea... Apache Jenkins Server
- Jenkins build is still unstable: beam_R... Apache Jenkins Server
- Jenkins build is still unstable: be... Apache Jenkins Server
- Jenkins build is back to stabl... Apache Jenkins Server