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[Michael Johnson <johnsomor@xxxxxxxxx>]

Public bug reported:

Master neutron (Stein):
We are intermittently seeing gate failures with a q-svc exception:

Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server [None req-9e4027ef-c0b5-4d46-99be-1a1da640c506 None None] Exception during message handling: AttributeError: 'NoneType' object has no attribute 'qos_policy_id'
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server Traceback (most recent call last):
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_messaging/rpc/server.py", line 166, in _process_incoming
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     res = self.dispatcher.dispatch(message)
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_messaging/rpc/dispatcher.py", line 265, in dispatch
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     return self._do_dispatch(endpoint, method, ctxt, args)
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_messaging/rpc/dispatcher.py", line 194, in _do_dispatch
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     result = func(ctxt, **new_args)
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/opt/stack/neutron/neutron/api/rpc/handlers/dhcp_rpc.py", line 146, in get_active_networks_info
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     ports = plugin.get_ports(context, filters=filters)
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/neutron_lib/db/api.py", line 233, in wrapped
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     return method(*args, **kwargs)
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/neutron_lib/db/api.py", line 140, in wrapped
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     setattr(e, '_RETRY_EXCEEDED', True)
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     self.force_reraise()
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     six.reraise(self.type_, self.value, self.tb)
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/six.py", line 693, in reraise
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     raise value
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/neutron_lib/db/api.py", line 136, in wrapped
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     return f(*args, **kwargs)
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_db/api.py", line 154, in wrapper
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     ectxt.value = e.inner_exc
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     self.force_reraise()
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     six.reraise(self.type_, self.value, self.tb)
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/six.py", line 693, in reraise
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     raise value
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_db/api.py", line 142, in wrapper
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     return f(*args, **kwargs)
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/neutron_lib/db/api.py", line 183, in wrapped
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     LOG.debug("Retry wrapper got retriable exception: %s", e)
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     self.force_reraise()
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     six.reraise(self.type_, self.value, self.tb)
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/six.py", line 693, in reraise
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     raise value
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/neutron_lib/db/api.py", line 179, in wrapped
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     return f(*dup_args, **dup_kwargs)
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/opt/stack/neutron/neutron/db/db_base_plugin_v2.py", line 1503, in get_ports
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     items = [self._make_port_dict(c, fields) for c in query]
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/opt/stack/neutron/neutron/db/db_base_plugin_v2.py", line 1503, in <listcomp>
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     items = [self._make_port_dict(c, fields) for c in query]
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/opt/stack/neutron/neutron/db/db_base_plugin_common.py", line 221, in _make_port_dict
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     resource_extend.apply_funcs(port_def.COLLECTION_NAME, res, port)
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/neutron_lib/db/resource_extend.py", line 84, in apply_funcs
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     resolved_func(response, db_object)
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/opt/stack/neutron/neutron/services/qos/qos_plugin.py", line 102, in _extend_port_resource_request
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     if net.qos_policy_id:
Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server AttributeError: 'NoneType' object has no attribute 'qos_policy_id'

It appears that the qos_plugin is always assuming it will get a network object back for ports:
neutron/services/qos/qos_plugin.py: L97

        # Note(lajoskatona): handle the case when the port inherits qos-policy
        # from the network.
        if not qos_policy:
            net = network_object.Network.get_object(
                context.get_admin_context(), id=port_res['network_id'])
            if net.qos_policy_id:
                qos_policy = policy_object.QosPolicy.get_network_policy(
                    context.get_admin_context(), net.id)

I think this needs to be updated to handle the case that a network is
not returned.

** Affects: neutron
     Importance: Undecided
     Assignee: Michael Johnson (johnsom)
         Status: In Progress


** Tags: qos

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https://bugs.launchpad.net/bugs/1811455

Title:
  QoS plugin fails if network is not found

Status in neutron:
  In Progress

Bug description:
  Master neutron (Stein):
  We are intermittently seeing gate failures with a q-svc exception:

  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server [None req-9e4027ef-c0b5-4d46-99be-1a1da640c506 None None] Exception during message handling: AttributeError: 'NoneType' object has no attribute 'qos_policy_id'
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server Traceback (most recent call last):
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_messaging/rpc/server.py", line 166, in _process_incoming
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     res = self.dispatcher.dispatch(message)
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_messaging/rpc/dispatcher.py", line 265, in dispatch
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     return self._do_dispatch(endpoint, method, ctxt, args)
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_messaging/rpc/dispatcher.py", line 194, in _do_dispatch
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     result = func(ctxt, **new_args)
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/opt/stack/neutron/neutron/api/rpc/handlers/dhcp_rpc.py", line 146, in get_active_networks_info
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     ports = plugin.get_ports(context, filters=filters)
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/neutron_lib/db/api.py", line 233, in wrapped
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     return method(*args, **kwargs)
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/neutron_lib/db/api.py", line 140, in wrapped
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     setattr(e, '_RETRY_EXCEEDED', True)
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     self.force_reraise()
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     six.reraise(self.type_, self.value, self.tb)
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/six.py", line 693, in reraise
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     raise value
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/neutron_lib/db/api.py", line 136, in wrapped
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     return f(*args, **kwargs)
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_db/api.py", line 154, in wrapper
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     ectxt.value = e.inner_exc
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     self.force_reraise()
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     six.reraise(self.type_, self.value, self.tb)
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/six.py", line 693, in reraise
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     raise value
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_db/api.py", line 142, in wrapper
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     return f(*args, **kwargs)
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/neutron_lib/db/api.py", line 183, in wrapped
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     LOG.debug("Retry wrapper got retriable exception: %s", e)
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     self.force_reraise()
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     six.reraise(self.type_, self.value, self.tb)
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/six.py", line 693, in reraise
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     raise value
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/neutron_lib/db/api.py", line 179, in wrapped
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     return f(*dup_args, **dup_kwargs)
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/opt/stack/neutron/neutron/db/db_base_plugin_v2.py", line 1503, in get_ports
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     items = [self._make_port_dict(c, fields) for c in query]
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/opt/stack/neutron/neutron/db/db_base_plugin_v2.py", line 1503, in <listcomp>
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     items = [self._make_port_dict(c, fields) for c in query]
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/opt/stack/neutron/neutron/db/db_base_plugin_common.py", line 221, in _make_port_dict
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     resource_extend.apply_funcs(port_def.COLLECTION_NAME, res, port)
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/usr/local/lib/python3.6/dist-packages/neutron_lib/db/resource_extend.py", line 84, in apply_funcs
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     resolved_func(response, db_object)
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server   File "/opt/stack/neutron/neutron/services/qos/qos_plugin.py", line 102, in _extend_port_resource_request
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server     if net.qos_policy_id:
  Jan 11 01:12:04.832940 ubuntu-bionic-ovh-bhs1-0001629903 neutron-server[15297]: ERROR oslo_messaging.rpc.server AttributeError: 'NoneType' object has no attribute 'qos_policy_id'

  It appears that the qos_plugin is always assuming it will get a network object back for ports:
  neutron/services/qos/qos_plugin.py: L97

          # Note(lajoskatona): handle the case when the port inherits qos-policy
          # from the network.
          if not qos_policy:
              net = network_object.Network.get_object(
                  context.get_admin_context(), id=port_res['network_id'])
              if net.qos_policy_id:
                  qos_policy = policy_object.QosPolicy.get_network_policy(
                      context.get_admin_context(), net.id)

  I think this needs to be updated to handle the case that a network is
  not returned.

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