See <https://builds.apache.org/job/karaf-master/4290/display/redirect?page=changes>
- Build failed in Jenkins: karaf-master #4287 Apache Jenkins Server
- Build failed in Jenkins: karaf-master #4288 Apache Jenkins Server
- Jenkins build is unstable: karaf-master #42... Apache Jenkins Server
- Jenkins build is still unstable: karaf-... Apache Jenkins Server
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