One of the nova unit tests fails due to backport of https://review.openstack.org/#/c/390225/

Without fix for this bug no backports will pass CI.




Failed

nova.tests.unit.network.test_os_vif_util.OSVIFUtilTestCase.test_nova_to_osvif_vhostuser_ovs (from (empty))

Failing for the past 3 builds (Since Failed#4 )
Took 0.1 sec.
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Stacktrace

Traceback (most recent call last):
testtools.testresult.real._StringException: Empty attachments:
  pythonlogging:''
  stderr
  stdout

Traceback (most recent call last):
  File "nova/tests/unit/network/test_os_vif_util.py", line 587, in test_nova_to_osvif_vhostuser_ovs
    self.assertObjEqual(expect, actual)
  File "nova/tests/unit/network/test_os_vif_util.py", line 37, in assertObjEqual
    actual.obj_to_primitive())
  File "/usr/lib/python2.7/site-packages/testtools/testcase.py", line 350, in assertEqual
    self.assertThat(observed, matcher, message)
  File "/usr/lib/python2.7/site-packages/testtools/testcase.py", line 435, in assertThat
    raise mismatch_error
testtools.matchers._impl.MismatchError: !=:
reference = {'versioned_object.data': {'active': False,
                           'address': '22:52:25:62:e2:aa',
                           'has_traffic_filtering': True,
                           'id': 'dc065497-3c8d-4f44-8fb4-e1d33c16a536',
                           'mode': u'client',
                           'network': {'versioned_object.data': {'bridge_interface': None,
                                                                 'id': 'b82c1929-051e-481d-8110-4669916c7915',
                                                                 'label': u'Demo Net',
                                                                 'mtu': None,
                                                                 'multi_host': False,
                                                                 'should_provide_bridge': False,
                                                                 'should_provide_vlan': False,
                                                                 'subnets': {'versioned_object.data': {'objects': []},
                                                                             'versioned_object.name': 'SubnetList',
                                                                             'versioned_object.namespace': 'os_vif',
                                                                             'versioned_object.version': '1.0'}},
                                       'versioned_object.name': 'Network',
                                       'versioned_object.namespace': 'os_vif',
                                       'versioned_object.version': '1.1'},
                           'path': u'/fake/socket',
                           'plugin': u'ovs',
                           'port_profile': {'versioned_object.data': {'interface_id': 'dc065497-3c8d-4f44-8fb4-e1d33c16a536'},
                                            'versioned_object.name': 'VIFPortProfileOpenVSwitch',
                                            'versioned_object.namespace': 'os_vif',
                                            'versioned_object.version': '1.0'},
                           'preserve_on_delete': False,
                           'vif_name': u'nicdc065497-3c'},
 'versioned_object.name': 'VIFVHostUser',
 'versioned_object.namespace': 'os_vif',
 'versioned_object.version': '1.1'}
actual    = {'versioned_object.data': {'active': False,
                           'address': '22:52:25:62:e2:aa',
                           'has_traffic_filtering': True,
                           'id': 'dc065497-3c8d-4f44-8fb4-e1d33c16a536',
                           'mode': u'client',
                           'network': {'versioned_object.data': {'bridge_interface': None,
                                                                 'id': 'b82c1929-051e-481d-8110-4669916c7915',
                                                                 'label': u'Demo Net',
                                                                 'mtu': None,
                                                                 'multi_host': False,
                                                                 'should_provide_bridge': False,
                                                                 'should_provide_vlan': False,
                                                                 'subnets': {'versioned_object.data': {'objects': []},
                                                                             'versioned_object.name': 'SubnetList',
                                                                             'versioned_object.namespace': 'os_vif',
                                                                             'versioned_object.version': '1.0'}},
                                       'versioned_object.name': 'Network',
                                       'versioned_object.namespace': 'os_vif',
                                       'versioned_object.version': '1.1'},
                           'path': u'/fake/socket',
                           'plugin': u'ovs',
                           'port_profile': {'versioned_object.data': {'interface_id': 'dc065497-3c8d-4f44-8fb4-e1d33c16a536'},
                                            'versioned_object.name': 'VIFPortProfileOpenVSwitch',
                                            'versioned_object.namespace': 'os_vif',
                                            'versioned_object.version': '1.0'},
                           'preserve_on_delete': False},
 'versioned_object.name': 'VIFVHostUser',
 'versioned_object.namespace': 'os_vif',
 'versioned_object.version': '1.1'}