Also, an each attempt of doing the snapshot results in the following in the libvirtd logs:
Sep 23 15:47:32 node09 libvirtd[1757]: invalid argument: disk vda does not have an active block job
Sep 23 15:47:32 node09 libvirtd[1757]: invalid argument: disk vda does not have an active block job
Sep 23 15:47:32 node09 libvirtd[1757]: unable to verify existence of block copy target: Permission denied
Also, an each attempt of doing the snapshot results in the following in the libvirtd logs:
Sep 23 15:47:32 node09 libvirtd[1757]: invalid argument: disk vda does not have an active block job
Sep 23 15:47:32 node09 libvirtd[1757]: invalid argument: disk vda does not have an active block job
Sep 23 15:47:32 node09 libvirtd[1757]: unable to verify existence of block copy target: Permission denied