See <https://builds.apache.org/job/UIMA-Ruta%20Java%2011/49/display/redirect?page=changes>
- Jenkins build became unstable: UIMA-Ruta Java 11 #4... Apache Jenkins Server
- Jenkins build is still unstable: UIMA-Ruta Java... Apache Jenkins Server
- Jenkins build is back to stable : UIMA-Ruta... Apache Jenkins Server
