See <https://builds.apache.org/job/karaf-master/5293/display/redirect?page=changes>
- Build failed in Jenkins: karaf-master #5288 Apache Jenkins Server
- Build failed in Jenkins: karaf-master #5289 Apache Jenkins Server
- Build failed in Jenkins: karaf-master #5290 Apache Jenkins Server
- Build failed in Jenkins: karaf-master #... Apache Jenkins Server
- Build failed in Jenkins: karaf-mast... Apache Jenkins Server
- Jenkins build is back to norma... Apache Jenkins Server
