Also, this thread seems similar.
Also talking about IPV4/IPV6 issue.
Does it help?

[1] http://lists.ovirt.org/pipermail/users/2016-June/040602.html

On Wed, Jul 20, 2016 at 4:43 PM, Martin Perina <mperina@redhat.com> wrote:
Hi,

could you please create a bug and attach engine host logs (all from
/var/log/ovirt-engine) and VDSM logs (from /var/log/vdsm)?

Thanks

Martin Perina


On Wed, Jul 20, 2016 at 1:50 PM, Gervais de Montbrun <gervais@demontbrun.com
> wrote:

> Hi Qiong,
>
> I am experiencing the exact same issue. All four of my hosts are throwing
> the same error to the vdsm.log If you find a solution, please let me know