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[Nate Johnston <1898657@xxxxxxxxxxxxxxxxxx>]

Reassigned to vmware-nsx as that is probably the place to fix this
binding with Octavia.  If you think the issue is more in the Octavia
space, feel free to submit a bug in storyboard here:
https://storyboard.openstack.org/#!/project/openstack/octavia

** Project changed: neutron => vmware-nsx

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https://bugs.launchpad.net/bugs/1898657

Title:
  LB health monitor deletion fails with exception "Server-side error:
  "'NoneType' object has no attribute 'load_balancer_id'"

Status in vmware-nsx:
  New

Bug description:
  Failure statement : LB health monitor deletion fails with exception
  "Server-side error: "'NoneType' object has no attribute
  'load_balancer_id'"

  Test executed : 1) Create LB, Virtual servers (HTTP & HTTPS), Pool, Members & Health monitors
                  2) Delete LB objects randomly
                  3) If there is a dependency to a object while its deleting, then handle exception 
                     BadRequestException, ConflictException
                  
                  

  Below is the HM tried to delete:
  DELETE /v2.0/lbaas/healthmonitors/50ffba87-3e85-4d59-8c46-d782a8cbe8eb

  
  octavia log trace:

  
  Oct 04 01:29:01 controller-ch9q6cgc8v octavia-api[805]: 2020-10-04 01:29:01.801 1 DEBUG vmware_nsx.services.lbaas.octavia.octavia_driver [req-
  9c7ab75f-3922-4cb7-81c0-a82b9f645a0c - a0a882c114b741c6a50e2fddc68a67db - default default] vmware_nsx.services.lbaas.octavia.octavia_driver.NS
  XOctaviaDriver method __init__ called with arguments () {} wrapper /usr/lib/python3.7/site-packages/oslo_log/helpers.py:66

  Oct 04 01:29:01 controller-ch9q6cgc8v octavia-api[805]: 2020-10-04 01:29:01.802 1 DEBUG vmware_nsx.services.lbaas.octavia.octavia_driver [req-
  9c7ab75f-3922-4cb7-81c0-a82b9f645a0c - a0a882c114b741c6a50e2fddc68a67db - default default] vmware_nsx.services.lbaas.octavia.octavia_driver.NS
  XOctaviaDriver method _init_rpc_messaging called with arguments () {} wrapper /usr/lib/python3.7/site-packages/oslo_log/helpers.py:66

  Oct 04 01:29:01 controller-ch9q6cgc8v octavia-api[805]: 2020-10-04 01:29:01.808 1 ERROR wsme.api [req-9c7ab75f-3922-4cb7-81c0-a82b9f645a0c - a0a882c114b741c6a50e2fddc68a67db - default default] Server-side error: "'NoneType' object has no attribute 'load_balancer_id'". Detail: 
  Oct 04 01:29:01 controller-ch9q6cgc8v octavia-api[805]: Traceback (most recent call last):
  Oct 04 01:29:01 controller-ch9q6cgc8v octavia-api[805]: 
  Oct 04 01:29:01 controller-ch9q6cgc8v octavia-api[805]:   File "/usr/lib/python3.7/site-packages/wsmeext/pecan.py", line 85, in callfunction
  Oct 04 01:29:01 controller-ch9q6cgc8v octavia-api[805]:     result = f(self, *args, **kwargs)
  Oct 04 01:29:01 controller-ch9q6cgc8v octavia-api[805]: 
  Oct 04 01:29:01 controller-ch9q6cgc8v octavia-api[805]:   File 
  "/usr/lib/python3.7/sitepackages/octavia/api/v2/controllers/health_monitor.py", line 413, in delete
  Oct 04 01:29:01 controller-ch9q6cgc8v octavia-api[805]:     self._test_lb_and_listener_and_pool_statuses(lock_session, db_hm)
  Oct 04 01:29:01 controller-ch9q6cgc8v octavia-api[805]: 
  Oct 04 01:29:01 controller-ch9q6cgc8v octavia-api[805]:   File "/usr/lib/python3.7/site-packages/octavia/api/v2/controllers/health_monitor.py"
  , line 94, in _test_lb_and_listener_and_pool_statuses
  Oct 04 01:29:01 controller-ch9q6cgc8v octavia-api[805]:     load_balancer_id = pool.load_balancer_id
  Oct 04 01:29:01 controller-ch9q6cgc8v octavia-api[805]: 
  Oct 04 01:29:01 controller-ch9q6cgc8v octavia-api[805]: AttributeError: 'NoneType' object has no attribute 'load_balancer_id'
  Oct 04 01:29:01 controller-ch9q6cgc8v octavia-api[805]: 
  Oct 04 01:29:23 controller-ch9q6cgc8v octavia-api[805]: 2020-10-04 01:29:23.215 1 DEBUG vmware_nsx.services.lbaas.octavia.octavia_driver [req-
  b2a8b23c-485c-4257-9f00-5a8f581a5387 - a0a882c114b741c6a50e2fddc68a67db - default default] vmware_nsx.services.lbaas.octavia.octavia_driver.NS
  XOctaviaDriver method __init__ called with arguments () {} wrapper /usr/lib/python3.7/site packages/oslo_log/helpers.py:66

  Test executed:
  @pytest.mark.esxitest
  @pytest.mark.usefixtures("do_cleanup")
  def test_lb_and_delete_in_random_order_TC27(lb, nsxvc, cloud):
      ''' As part of this test case a LB topology will be brought up.
          Different components of the LB will be tried to be deleted
          in random order '''
      _test_case = inspect.stack()[0][3].split("_")[-1]

      router, network, subnet =\
             ru.create_net_subnet_rtr_lb(cloud, _test_case)

      lb, lsnr, pool, hm, lbfip, mem1, mem2 =\
             create_general_roundrobin_lb_topo(_test_case,
                                    network, subnet, router, cloud, nsxvc)
      # Creating a dictionary of the LB resources
      # Format of dictionary is same as clenaup.py since we are going to
      # use delete functions of cleanup.py
      clean_lb_res = Clean(cloud, _test_case)
      clean_lb_res.resources = {"lbs": [lb],
                                "listeners": [lsnr],
                                "pools": [pool],
                                "health_monitors": [hm],
                                "pool_members": [{pool.id: [mem1, mem2]}]}

      # Below loop will try for 5 mins to randomly delete lb resources.
      # After 5 mins the test case will fail.
      lb_keys = clean_lb_res.resources.keys()
      start_time = time.time()
      while lb_keys and time.time() - start_time < 300:
          # Randomly select one lb resource
          indx = randrange(0, len(lb_keys))
          lb_res = lb_keys[indx]

          # Start deleting the resource
          try:
              func_name = "delete_%s" % (lb_res)
              getattr(clean_lb_res, func_name)()
              # removing element from list since successfully deleted
              lb_keys.remove(lb_res)
          except AttributeError as e:
              log.exception(e)
              assert False, "Function with name %s doesn't exist" % (func_name)
          except (exc.BadRequestException, exc.ConflictException) as e:
              log.info("Message=%s, Response=%s, Details=%s, request_id=%s" % \
                      (e.message, e.response, e.details, e.request_id))
              log.info("%s didn't work, selecting some other lb resource to"
                       " delete" % (func_name))

      assert not lb_keys, "Still some resources left to be cleaned"

  Test failure:

  getattr(clean_lb_res, func_name)()
  tests/test_load_balancer.py:1126: 
  _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
  cleanup.py:205: in delete_health_monitors
      self.cloud.delete_health_monitor(hm)
  resources.py:619: in delete_health_monitor
      return self.conn.load_balancer.delete_health_monitor(healthmonitor)
  systest_env/local/lib/python2.7/site-packages/openstack/load_balancer/v2/_proxy.py:471: in delete_health_monitor
      ignore_missing=ignore_missing)
  systest_env/local/lib/python2.7/site-packages/openstack/proxy.py:41: in check
      return method(self, expected, actual, *args, **kwargs)
  systest_env/local/lib/python2.7/site-packages/openstack/proxy.py:144: in _delete
      rv = res.delete(self)
  systest_env/local/lib/python2.7/site-packages/openstack/resource.py:876: in delete
      self._translate_response(response, has_body=False, **kwargs)
  systest_env/local/lib/python2.7/site-packages/openstack/resource.py:695: in _translate_response
      exceptions.raise_from_response(response, error_message=error_message)
  _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
  response = <Response [500]>, error_message = None
      def raise_from_response(response, error_message=None):
          """Raise an instance of an HTTPException based on keystoneauth response."""
          if response.status_code < 400:
              return
          if response.status_code == 409:
              cls = ConflictException
          elif response.status_code == 404:
              cls = NotFoundException
          elif response.status_code == 400:
              cls = BadRequestException
          else:
              cls = HttpException
          details = None
          content_type = response.headers.get('content-type', '')
          if response.content and 'application/json' in content_type:
              # Iterate over the nested objects to retrieve "message" attribute.
              # TODO(shade) Add exception handling for times when the content type
              # is lying.
              try:
                  content = response.json()
                  messages = [obj.get('message') for obj in content.values()
                              if isinstance(obj, dict)]
                  # Join all of the messages together nicely and filter out any
                  # objects that don't have a "message" attr.
                  details = '\n'.join(msg for msg in messages if msg)
              except Exception:
                  details = response.text
          elif response.content and 'text/html' in content_type:
              # Split the lines, strip whitespace and inline HTML from the response.
              details = [re.sub(r'<.+?>', '', i.strip())
                         for i in response.text.splitlines()]
              details = list(set([msg for msg in details if msg]))
              # Return joined string separated by colons.
              details = ': '.join(details)
          if not details and response.reason:
              details = response.reason
          else:
              details = response.text
          http_status = response.status_code
          request_id = response.headers.get('x-openstack-request-id')
          raise cls(
              message=error_message, response=response, details=details,
  http_status=http_status, request_id=request_id
          )
  E       HttpException: HttpException: 500: Server Error for url: https://172.18.150.100:9876/v2.0/lbaas/healthmonitors/50ffba87-3e85-4d59-8c46-d782a8cbe8eb, Internal Server Error

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