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[Richard Theis <rtheis@xxxxxxxxxx>]

** Also affects: neutron
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1618343

Title:
  UT failed for PortsV2 case
  test_update_port_status_notify_port_event_after_update

Status in networking-ovn:
  New
Status in neutron:
  In Progress

Bug description:
  http://logs.openstack.org/09/356409/8/check/gate-networking-ovn-python27-ubuntu-xenial/8eee3a5/testr_results.html.gz
  http://logs.openstack.org/01/358501/2/check/gate-networking-ovn-python27-ubuntu-xenial/898e607/testr_results.html.gz
  http://logs.openstack.org/94/362494/1/check/gate-networking-ovn-python27-ubuntu-xenial/658a521/testr_results.html.gz

  the above UT reports failed with
  networking_ovn.tests.unit.ml2.test_mech_driver.TestOVNMechansimDriverPortsV2.test_update_port_status_notify_port_event_after_update.

  Two errors with AttributeError: 'NoneType' object has no attribute 'transaction' on self._nb_ovn in mech_driver:
     ERROR [neutron.callbacks.manager] Error during notification for networking_ovn.ml2.mech_driver.OVNMechanismDriver._process_sg_notification-988068 security_group, after_create
  Traceback (most recent call last):
    File "/tmp/openstack/neutron/neutron/callbacks/manager.py", line 148, in _notify_loop
      callback(resource, event, trigger, **kwargs)
    File "networking_ovn/ml2/mech_driver.py", line 197, in _process_sg_notification
      with self._nb_ovn.transaction(check_error=True) as txn:
  AttributeError: 'NoneType' object has no attribute 'transaction'

     ERROR [neutron.plugins.ml2.managers] Mechanism driver 'ovn' failed in update_port_postcommit
  Traceback (most recent call last):
    File "/tmp/openstack/neutron/neutron/plugins/ml2/managers.py", line 433, in _call_on_drivers
      getattr(driver.obj, method_name)(context)
    File "networking_ovn/ml2/mech_driver.py", line 680, in update_port_postcommit
      self.update_port(port, original_port)
    File "networking_ovn/ml2/mech_driver.py", line 684, in update_port
      original_port=original_port)
    File "networking_ovn/ml2/mech_driver.py", line 593, in get_ovn_port_options
      port, original_port=original_port)
    File "networking_ovn/ml2/mech_driver.py", line 820, in _get_port_dhcpv4_options
      subnet_dhcp_options = self._nb_ovn.get_subnet_dhcp_options(
  AttributeError: 'NoneType' object has no attribute 'get_subnet_dhcp_options'
  }}}

  Patches like https://review.openstack.org/#/c/326964 (http://logs.openstack.org/64/326964/7/check/gate-networking-ovn-python27-ubuntu-xenial/a5800ae/testr_results.html.gz), they passed UT, for 
  they didn't run test_update_port_status_notify_port_event_after_update, they have 125 test cases in networking_ovn.tests.unit.ml2.test_mech_driver.TestOVNMechansimDriverPortsV2.
  But the failed 3 ones have 126 test cases.

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