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[Miguel Lavalle <2024630@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 2024447 ***
    https://bugs.launchpad.net/bugs/2024447

Never mind, fix merged
https://review.opendev.org/c/openstack/neutron/+/886457

** This bug has been marked a duplicate of bug 2024447
   [OVN] "_load_hash_ring" is couting the hash righ nodes without opening a DB txn

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Title:
  Neutron server log full of Jun 16 12:44:13.388637 np0034319125
  neutron-server[83465]: WARNING neutron.objects.base [-] ORM session:
  SQL execution without transaction in progress, traceback:

Status in neutron:
  New

Bug description:
  In the neutron-tempest-plugin-ovn job, the neutron server log is full
  of the following error:

  Jun 16 12:44:13.388278 np0034319125 neutron-server[83462]: DEBUG neutron.plugins.ml2.drivers.ovn.mech_driver.ovsdb.ovsdb_monitor [None req-7cbd9fa8-94fb-4740-b7e9-afa577da1f57 None None] ChassisMetadataAgentWriteEvent : Matched Chassis_Private, update, None None {{(pid=83462) matches /opt/stack/neutron/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovsdb_monitor.py:63}}
  Jun 16 12:44:13.388451 np0034319125 neutron-server[83463]: DEBUG neutron.plugins.ml2.drivers.ovn.mech_driver.ovsdb.ovsdb_monitor [None req-d2439ba0-25a6-419e-a0a4-c213f125a947 None None] ChassisMetadataAgentWriteEvent : Matched Chassis_Private, update, None None {{(pid=83463) matches /opt/stack/neutron/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovsdb_monitor.py:63}}
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]: WARNING neutron.objects.base [-] ORM session: SQL execution without transaction in progress, traceback:
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:   File "/usr/local/lib/python3.10/dist-packages/eventlet/green/thread.py", line 43, in __thread_body
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:     func(*args, **kwargs)
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:   File "/usr/lib/python3.10/threading.py", line 973, in _bootstrap
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:     self._bootstrap_inner()
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:   File "/usr/local/lib/python3.10/dist-packages/eventlet/green/thread.py", line 64, in wrap_bootstrap_inner
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:     bootstrap_inner()
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:   File "/usr/lib/python3.10/threading.py", line 1016, in _bootstrap_inner
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:     self.run()
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:   File "/usr/lib/python3.10/threading.py", line 953, in run 
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:     self._target(*self._args, **self._kwargs)
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:   File "/usr/local/lib/python3.10/dist-packages/ovsdbapp/backend/ovs_idl/connection.py", line 107, in run 
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:     self.idl.run()
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:   File "/usr/local/lib/python3.10/dist-packages/ovs/db/idl.py", line 464, in run 
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:     self.__parse_update(msg.params[2], OVSDB_UPDATE3)
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:   File "/usr/local/lib/python3.10/dist-packages/ovs/db/idl.py", line 891, in __parse_update
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:     self.__do_parse_update(update, version, self.tables)
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:   File "/usr/local/lib/python3.10/dist-packages/ovs/db/idl.py", line 951, in __do_parse_update
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:     self.notify(*notice)
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:   File "/opt/stack/neutron/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovsdb_monitor.py", line 727, in notify 
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:     target_node = self._hash_ring.get_node(str(row.uuid))
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:   File "/opt/stack/neutron/neutron/common/ovn/hash_ring_manager.py", line 106, in get_node
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:     self._load_hash_ring()
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:   File "/opt/stack/neutron/neutron/common/ovn/hash_ring_manager.py", line 90, in _load_hash_ring
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:     nodes = db_hash_ring.get_active_nodes(
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:   File "/opt/stack/neutron/neutron/db/ovn_hash_ring_db.py", line 88, in get_active_nodes
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:     return query.all()
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:   File "/usr/local/lib/python3.10/dist-packages/sqlalchemy/orm/query.py", line 2772, in all 
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:     return self._iter().all()
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:   File "/usr/local/lib/python3.10/dist-packages/sqlalchemy/orm/query.py", line 2907, in _iter
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:     result = self.session.execute(
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:   File "/usr/local/lib/python3.10/dist-packages/sqlalchemy/orm/session.py", line 1693, in execute
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]:     result = fn(orm_exec_state)
  Jun 16 12:44:13.388637 np0034319125 neutron-server[83465]: 

  
  It seems the problem starts showing with the merge of https://review.opendev.org/c/openstack/neutron/+/886005. The next change to merge was https://review.opendev.org/c/openstack/neutron/+/885744 and also shows the problem

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