Looking at
https://bugzilla.redhat.com/1666795
It seems that a change in vdsm/libvirt exposed NFS configuration issue,
that may was
needed in the past and probably not needed now.
If you use NFS, I would like to see your /etc/exports (after sanitizing it
if needed).
For extra bonus, output of "exportfs -v" would be useful.
In particular, I want to know if you use root_squash, all_squash, or
no_root_squash.
Thanks,
Nir