Job stuck in cleanup for 13 hours

See http://jenkins.ovirt.org/job/ovirt-release_4.1_build-artifacts-el7-x86_64... Build stuck after 16 minutes (using elapsed time): *00:16:49.203* + sudo systemctl restart docker Failure detected after 6 hours:*06:00:07.301* Build timed out (after 360 minutes). Marking the build as failed. But the job is still running: *06:00:08.490* + xargs -r sudo docker rm -f Why build-artifacts job needs 6 hours timeout? Nir