nova.tests.test_cloud.CloudTestCase.test_associate_disassociate_address fails under python 2.7

[Soren Hansen]

I'm not sure why it doesn't happen with Python 2.6 (and it doesn't even seem to happen every time with python 2.7), but here's the traceback:

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ERROR: test_associate_disassociate_address (nova.tests.test_cloud.CloudTestCase)
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Traceback (most recent call last):
  File "/build/buildd/nova-2011.1~bzr549/nova/tests/test_cloud.py", line 112, in test_associate_disassociate_address
    public_ip=address)
  File "/build/buildd/nova-2011.1~bzr549/nova/api/ec2/cloud.py", line 708, in associate_address
    self.compute_api.associate_floating_ip(context, instance_id, public_ip)
  File "/build/buildd/nova-2011.1~bzr549/nova/compute/api.py", line 500, in associate_floating_ip
    instance['fixed_ip'])
  File "/build/buildd/nova-2011.1~bzr549/nova/network/api.py", line 70, in associate_floating_ip
    host = fixed_ip['network']['host']
  File "/build/buildd/nova-2011.1~bzr549/nova/db/sqlalchemy/models.py", line 74, in __getitem__
    return getattr(self, key)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/attributes.py", line 163, in __get__
    instance_dict(instance))
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/attributes.py", line 383, in get
    value = callable_(passive=passive)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/strategies.py", line 595, in __call__
    (mapperutil.state_str(state), self.key)
DetachedInstanceError: Parent instance <FixedIp at 0x97deaac> is not bound to a Session; lazy load operation of attribute 'network' cannot proceed

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FAIL: test_instance_update_state (nova.tests.test_cloud.CloudTestCase)
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Traceback (most recent call last):
  File "/build/buildd/nova-2011.1~bzr549/nova/tests/test_cloud.py", line 263, in test_instance_update_state
    self.assert_(len(rv['reservationSet']) == 0)
AssertionError: False is not true

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FAIL: test_run_terminate (nova.tests.test_compute.ComputeTestCase)
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Traceback (most recent call last):
  File "/build/buildd/nova-2011.1~bzr549/nova/tests/test_compute.py", line 105, in test_run_terminate
    self.assertEqual(len(instances), 1)
AssertionError: 2 != 1

The last two are follow-on errors from the first (due to unclean data store afterwards).