Log patterns v1:
May  8 12:00:35 rhel64-1 external/libvirt[19084]: ERROR: Should never happen: Called for host vm02 but vm02 is not in vm01.
May  8 12:00:37 rhel64-1 external/libvirt[19101]: ERROR: Should never happen: Called for host vm02 but vm02 is not in vm01.
