Comment 12 for bug 917245

The bug looks identical to one that Redhat recently closed: https://bugzilla.redhat.com/show_bug.cgi?id=712266

Their fix was to add a cleanup call to libvirt - see comment 6 on the Redhat page.

I have been able to reproduce this on a Folsom-2 cluster using Precise by repeatedly adding and removing a volume with the same mountpoint. Strangely, the fault did not show up on all instances I tried it on.