Created attachment 1237574 [details]
nova log when bug appearing
Description of problem:
qemu version :1.5.3
libvirt version :1.2.17
virsh bases libvirt 1.2.17,qemu 1.2.17
Appears to occur every few days.After rebooting host machine,bug disappeared.
VMs not response.
nova log exception: Requested operation is not valid: cpu affinity is not supported.
VMs will be only PAUSE state after rebooting.
VMs live migration is failed.
nova log: 11782 ERROR oslo_messaging.rpc.dispatcher libvirtError: Timed out during operation: cannot acquire state change lock (held by remoteDispatchDomainCreateWithFlags)
see attachment for log