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[Bug 1326998] [NEW] UnboundLocalError: local variable 'domain' referenced before assignment

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Public bug reported:

Get this sometimes when an instance fails to build


2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330] Traceback (most recent call last):
2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 1311, in _build_instance
2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]     set_access_ip=set_access_ip)
2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 399, in decorated_function
2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]     return function(self, context, *args, **kwargs)
2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 1723, in _spawn
2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]     LOG.exception(_('Instance failed to spawn'), instance=instance)
2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]   File "/usr/lib/python2.7/dist-packages/nova/openstack/common/excutils.py", line 68, in __exit__
2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]     six.reraise(self.type_, self.value, self.tb)
2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 1720, in _spawn
2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]     block_device_info)
2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 2253, in spawn
2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]     block_device_info)
2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 3651, in _create_domain_and_network
2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]     domain.destroy()
2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330] UnboundLocalError: local variable 'domain' referenced before assignment

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1326998

Title:
  UnboundLocalError: local variable 'domain' referenced before
  assignment

Status in OpenStack Compute (Nova):
  New

Bug description:
  Get this sometimes when an instance fails to build


  2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330] Traceback (most recent call last):
  2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 1311, in _build_instance
  2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]     set_access_ip=set_access_ip)
  2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 399, in decorated_function
  2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]     return function(self, context, *args, **kwargs)
  2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 1723, in _spawn
  2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]     LOG.exception(_('Instance failed to spawn'), instance=instance)
  2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]   File "/usr/lib/python2.7/dist-packages/nova/openstack/common/excutils.py", line 68, in __exit__
  2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]     six.reraise(self.type_, self.value, self.tb)
  2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 1720, in _spawn
  2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]     block_device_info)
  2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 2253, in spawn
  2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]     block_device_info)
  2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 3651, in _create_domain_and_network
  2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330]     domain.destroy()
  2014-06-06 09:43:39.055 19328 TRACE nova.compute.utils [instance: d46aad17-c75d-4734-abdb-9b768a40c330] UnboundLocalError: local variable 'domain' referenced before assignment

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