See <https://builds.apache.org/job/UIMA-DUCC/org.apache.uima$uima-ducc-orchestrator/599/>
- Jenkins build became unstable: UIMA-DUCC » Apache U... Apache Jenkins Server
- Jenkins build is still unstable: UIMA-DUCC » Ap... Apache Jenkins Server
- Jenkins build is back to stable : UIMA-DUCC... Apache Jenkins Server
