backup-begin

[André Malm]

Hello,

For some vms the virsh backup-begin sometimes shuts off the vm and 
returns "error: operation failed: domain is not running" although it was 
clearly in state running (or paused).

Is the idea that you should guest-fsfreeze-freeze / virsh suspend before 
virsh backup-begin? I have tried with both with the same results.

What could be causing the machine to shut off?

Thanks,
André