We are facing this issue with Centos 7.3 and midonet, using Mitaka and Newton



2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]     six.reraise(self.type_, self.value, self.tb)
    </video>
    <memballoon model='virtio'>
      <stats period='10'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </memballoon>
  </devices>
</domain>

2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [req-ee0ff712-fa23-4c92-8f13-cd2317a22d18 d9b418abe271405c9c74a45169813769 a8fc3474d5324dbeb58db66f140
d2402 - - -] [instance: d160e467-2dca-46aa-ba41-1bc183545d2b] Instance failed to spawn
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b] Traceback (most recent call last):
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]   File "/usr/lib/python2.7/site-packages/nova/compute
/manager.py", line 2218, in _build_resources
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]     yield resources
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]   File "/usr/lib/python2.7/site-packages/nova/compute
/manager.py", line 2064, in _build_and_run_instance
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]     block_device_info=block_device_info)
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]   File "/usr/lib/python2.7/site-packages/nova/virt/li
bvirt/driver.py", line 2779, in spawn
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]     block_device_info=block_device_info)
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]   File "/usr/lib/python2.7/site-packages/nova/virt/li
bvirt/driver.py", line 4923, in _create_domain_and_network
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]     xml, pause=pause, power_on=power_on)
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]   File "/usr/lib/python2.7/site-packages/nova/virt/li
bvirt/driver.py", line 4854, in _create_domain
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]     guest.launch(pause=pause)
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]   File "/usr/lib/python2.7/site-packages/nova/virt/li
bvirt/guest.py", line 142, in launch
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]     self._encoded_xml, errors='ignore')
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]   File "/usr/lib/python2.7/site-packages/oslo_utils/e
xcutils.py", line 220, in __exit__
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]     self.force_reraise()
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]   File "/usr/lib/python2.7/site-packages/oslo_utils/e
xcutils.py", line 196, in force_reraise
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]     six.reraise(self.type_, self.value, self.tb)
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/guest.py", line 137, in launch
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]     return self._domain.createWithFlags(flags)
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]   File "/usr/lib/python2.7/site-packages/eventlet/tpool.py", line 186, in doit
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]     result = proxy_call(self._autowrap, f, *args, **kwargs)
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]   File "/usr/lib/python2.7/site-packages/eventlet/tpool.py", line 144, in proxy_call
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]     rv = execute(f, *args, **kwargs)
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]   File "/usr/lib/python2.7/site-packages/eventlet/tpool.py", line 125, in execute
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]     six.reraise(c, e, tb)
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]   File "/usr/lib/python2.7/site-packages/eventlet/tpool.py", line 83, in tworker
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]     rv = meth(*args, **kwargs)
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]   File "/usr/lib64/python2.7/site-packages/libvirt.py", line 1065, in createWithFlags
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]     if ret == -1: raise libvirtError ('virDomainCreateWithFlags() failed', dom=self)
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b] libvirtError: Cannot find '' in path: No such file or directory
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]     six.reraise(c, e, tb)
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]   File "/usr/lib/python2.7/site-packages/eventlet/tpo
ol.py", line 83, in tworker
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]     rv = meth(*args, **kwargs)
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]   File "/usr/lib64/python2.7/site-packages/libvirt.py
", line 1065, in createWithFlags
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]     if ret == -1: raise libvirtError ('virDomainCreat
eWithFlags() failed', dom=self)
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b] libvirtError: Cannot find '' in path: No such file or
 directory
2017-01-05 22:05:15.984 10009 ERROR nova.compute.manager [instance: d160e467-2dca-46aa-ba41-1bc183545d2b]