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[Bug 2091071] [NEW] ovn-agent: exception when deleing agent

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Kien Nguyen <2091071@xxxxxxxxxxxxxxxxxx>
Date: Thu, 05 Dec 2024 06:48:51 -0000
Reply-to: Bug 2091071 <2091071@xxxxxxxxxxxxxxxxxx>
Sender: noreply@xxxxxxxxxxxxx
Public bug reported:

Call neutron API to delete ovn agent, it returns 204 but the agent isn't
deleted. Check neutron-server.log find out there is an exception when
deleting agent:

```
2024-12-04 09:21:15.303 838 ERROR ovsdbapp.event [-] Unexpected exception in notify_loop: TypeError: unhashable type: 'list'
2024-12-04 09:21:15.303 838 ERROR ovsdbapp.event Traceback (most recent call last):
2024-12-04 09:21:15.303 838 ERROR ovsdbapp.event   File "/var/lib/kolla/venv/lib/python3.10/site-packages/ovsdbapp/event.py", line 177, in notify_loop
2024-12-04 09:21:15.303 838 ERROR ovsdbapp.event     match.run(event, row, updates)
2024-12-04 09:21:15.303 838 ERROR ovsdbapp.event   File "/var/lib/kolla/venv/lib/python3.10/site-packages/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovsdb_monitor.py", line 330, in run
2024-12-04 09:21:15.303 838 ERROR ovsdbapp.event     n_agent.AgentCache().delete([row.external_ids['delete_agent']])
2024-12-04 09:21:15.303 838 ERROR ovsdbapp.event   File "/var/lib/kolla/venv/lib/python3.10/site-packages/neutron/plugins/ml2/drivers/ovn/agent/neutron_agent.py", line 282, in delete
2024-12-04 09:21:15.303 838 ERROR ovsdbapp.event     del self.agents[agent_id]
2024-12-04 09:21:15.303 838 ERROR ovsdbapp.event TypeError: unhashable type: 'list'
2024-12-04 09:21:15.303 838 ERROR ovsdbapp.event
2024-12-04 09:21:15.303 799 ERROR ovsdbapp.event [-] Unexpected exception in notify_loop: TypeError: unhashable type: 'list'
2024-12-04 09:21:15.303 799 ERROR ovsdbapp.event Traceback (most recent call last):
2024-12-04 09:21:15.303 799 ERROR ovsdbapp.event   File "/var/lib/kolla/venv/lib/python3.10/site-packages/ovsdbapp/event.py", line 177, in notify_loop
2024-12-04 09:21:15.303 799 ERROR ovsdbapp.event     match.run(event, row, updates)
2024-12-04 09:21:15.303 799 ERROR ovsdbapp.event   File "/var/lib/kolla/venv/lib/python3.10/site-packages/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovsdb_monitor.py", line 330, in run
2024-12-04 09:21:15.303 799 ERROR ovsdbapp.event     n_agent.AgentCache().delete([row.external_ids['delete_agent']])
2024-12-04 09:21:15.303 799 ERROR ovsdbapp.event   File "/var/lib/kolla/venv/lib/python3.10/site-packages/neutron/plugins/ml2/drivers/ovn/agent/neutron_agent.py", line 282, in delete
2024-12-04 09:21:15.303 799 ERROR ovsdbapp.event     del self.agents[agent_id]
2024-12-04 09:21:15.303 799 ERROR ovsdbapp.event TypeError: unhashable type: 'list'
```

** Affects: neutron
     Importance: Undecided
         Status: New

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Title:
  ovn-agent: exception when deleing agent

Status in neutron:
  New

Bug description:
  Call neutron API to delete ovn agent, it returns 204 but the agent
  isn't deleted. Check neutron-server.log find out there is an exception
  when deleting agent:

  ```
  2024-12-04 09:21:15.303 838 ERROR ovsdbapp.event [-] Unexpected exception in notify_loop: TypeError: unhashable type: 'list'
  2024-12-04 09:21:15.303 838 ERROR ovsdbapp.event Traceback (most recent call last):
  2024-12-04 09:21:15.303 838 ERROR ovsdbapp.event   File "/var/lib/kolla/venv/lib/python3.10/site-packages/ovsdbapp/event.py", line 177, in notify_loop
  2024-12-04 09:21:15.303 838 ERROR ovsdbapp.event     match.run(event, row, updates)
  2024-12-04 09:21:15.303 838 ERROR ovsdbapp.event   File "/var/lib/kolla/venv/lib/python3.10/site-packages/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovsdb_monitor.py", line 330, in run
  2024-12-04 09:21:15.303 838 ERROR ovsdbapp.event     n_agent.AgentCache().delete([row.external_ids['delete_agent']])
  2024-12-04 09:21:15.303 838 ERROR ovsdbapp.event   File "/var/lib/kolla/venv/lib/python3.10/site-packages/neutron/plugins/ml2/drivers/ovn/agent/neutron_agent.py", line 282, in delete
  2024-12-04 09:21:15.303 838 ERROR ovsdbapp.event     del self.agents[agent_id]
  2024-12-04 09:21:15.303 838 ERROR ovsdbapp.event TypeError: unhashable type: 'list'
  2024-12-04 09:21:15.303 838 ERROR ovsdbapp.event
  2024-12-04 09:21:15.303 799 ERROR ovsdbapp.event [-] Unexpected exception in notify_loop: TypeError: unhashable type: 'list'
  2024-12-04 09:21:15.303 799 ERROR ovsdbapp.event Traceback (most recent call last):
  2024-12-04 09:21:15.303 799 ERROR ovsdbapp.event   File "/var/lib/kolla/venv/lib/python3.10/site-packages/ovsdbapp/event.py", line 177, in notify_loop
  2024-12-04 09:21:15.303 799 ERROR ovsdbapp.event     match.run(event, row, updates)
  2024-12-04 09:21:15.303 799 ERROR ovsdbapp.event   File "/var/lib/kolla/venv/lib/python3.10/site-packages/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovsdb_monitor.py", line 330, in run
  2024-12-04 09:21:15.303 799 ERROR ovsdbapp.event     n_agent.AgentCache().delete([row.external_ids['delete_agent']])
  2024-12-04 09:21:15.303 799 ERROR ovsdbapp.event   File "/var/lib/kolla/venv/lib/python3.10/site-packages/neutron/plugins/ml2/drivers/ovn/agent/neutron_agent.py", line 282, in delete
  2024-12-04 09:21:15.303 799 ERROR ovsdbapp.event     del self.agents[agent_id]
  2024-12-04 09:21:15.303 799 ERROR ovsdbapp.event TypeError: unhashable type: 'list'
  ```

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