sounds a lot like bug 1703510, which was supposed to have been fixed in 4.1.0 by [1]. [1]: https://github.com/openshift/origin/pull/22689 [2]: https://bugzilla.redhat.com/show_bug.cgi?id=1703510#c2
6 failures over the last 14 days out of 3600 jobs run. I think we can close this for now.