libvirt users - Dec 2018 - XML-RPC

Hi all,

I have 2 Centos servers running libvirtd. They are running using peacemaker
cluster. After I had to reboot server 1, I can't no longer start VMs on
server 2. I'm getting the following error message:

error: Failed to start domain testvm
error: internal error: Process exited prior to exec: libvirt: XML-RPC error
: Failed to connect socket to '/var/run/libvirt/virtlockd-sock':
Connection
refused

I can see that the deamon is listening on the port. I also couldn't find
any further information in any logfile.

Any idea?

Thanks,
Markus