[ovirt-users] Unable to start nor to migrate vm

[Arsène Gschwind]

Hi,

I'm having trouble with our ovirt environment, i'm not able to start VMs 
nor to migrate running ones, i'm getting the following error:

libvirtError: error from service: ListActivatableNames: Did not receive 
a reply. Possible causes include: the remote application did not send a 
reply, the message bus security policy blocked the reply, the reply 
timeout expired, or the network connection was broken.

Any idea what causes this error?

oVirt (oVirt Engine Version: 3.5.6.2-1.el7.centos) running on:
CentOS Linux release 7.2.1511
kernel : 3.10.0-327.4.4.el7.x86_64

Nodes:
Red Hat Enterprise Linux Server release 7.2 (Maipo)
vdsm-python-4.16.30-0.el7.centos.noarch
vdsm-cli-4.16.30-0.el7.centos.noarch
vdsm-yajsonrpc-4.16.30-0.el7.centos.noarch
vdsm-xmlrpc-4.16.30-0.el7.centos.noarch
vdsm-hook-vmdisk-4.16.30-0.el7.centos.noarch
vdsm-jsonrpc-4.16.30-0.el7.centos.noarch
vdsm-hook-floppy-4.16.30-0.el7.centos.noarch
vdsm-python-zombiereaper-4.16.30-0.el7.centos.noarch
vdsm-4.16.30-0.el7.centos.x86_64
vdsm-hook-vhostmd-4.16.30-0.el7.centos.noarch

Thanks for any hint/help.
rgds,
Arsène