Description of problem: It provides a warning and a hint to look at https://wiki.jenkins.io/display/JENKINS/Remove+Git+Plugin+BuildsByBranch+BuildData to workaround it.
So, that do not seems like a memory leak, but that would solve our disk space issue in a elegant way. It should also solve by itself with 3.0 version of the git plugin, currently in beta. I guess we can first clean the branch with the groovy script, that would give use some more breathing room, and later wait for the upgrade ?
Adding the Github link to track the pull request which fixes this.
This bug is moved to https://github.com/gluster/project-infrastructure/issues/33, and will be tracked there from now on. Visit GitHub issues URL for further details