[Bug 2103413] Re: Python3.13: Garbage collection happens too early on greenthread switches

Uggla 2103413 at bugs.launchpad.net
Wed May 14 13:19:46 UTC 2025 

Current Status: Nova does not officially support Python 3.13 yet. It's
included only as part of the experimental runtime for the current
release.

Future Plans: Full support is targeted for 2026.1. However, testing
should begin now since Python 3.13 might become mandatory in the next
development cycle.

Distribution Impact: Ubuntu 25.04 and possibly Debian 13 already use
Python 3.13, making this issue more pressing.

Main Blocker: Eventlet is currently broken on Python 3.13, particularly
due to:

    Issues with thread ID patching for greenthreads.

    Suspected interaction problems with the garbage collector (GC).

Workarounds & Outlook:

    Fixes to eventlet are uncertain and likely not feasible in the
current cycle (“F”).

    There is a preference to drop eventlet entirely in the “G” release
as a long-term solution.

    Until then, any fix to support Python 3.13 would be "best-effort"
and may require backports.

Related Issues:

    eventlet#1030

    eventlet#1032 – identified as the relevant blocker for Nova.


The current draft plan is to address Python 3.13 support and eventlet removal together in the G release.
I'm setting the bug status to Deferred for now — feel free to set it back to New if the situation changes.

** Changed in: nova
       Status: New => Deferred

** Changed in: nova
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/2103413

Title:
  Python3.13: Garbage collection happens too early on greenthread
  switches

Status in OpenStack Compute (nova):
  Deferred
Status in Release Notes for Ubuntu:
  In Progress
Status in nova package in Ubuntu:
  New

Bug description:
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f] Traceback (most recent call last):
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/nova/compute/manager.py", line 2648, in _build_and_run_instance
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     self.driver.spawn(context, instance, image_meta,
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                       injected_files, admin_password,
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                       allocs, network_info=network_info,
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                       block_device_info=block_device_info,
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                       accel_info=accel_info)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                       ^^^^^^^^^^^^^^^^^^^^^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/nova/virt/libvirt/driver.py", line 4832, in spawn
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     xml = self._get_guest_xml(context, instance, network_info,
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                               disk_info, image_meta,
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                               block_device_info=block_device_info,
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                               mdevs=mdevs, accel_info=accel_info)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/nova/virt/libvirt/driver.py", line 7997, in _get_guest_xml
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     network_info_str = str(network_info)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/nova/network/model.py", line 622, in __str__
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     return self._sync_wrapper(fn, *args, **kwargs)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]            ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/nova/network/model.py", line 605, in _sync_wrapper
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     self.wait()
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     ~~~~~~~~~^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/nova/network/model.py", line 637, in wait
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     self[:] = self._gt.wait()
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]               ~~~~~~~~~~~~~^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/eventlet/greenthread.py", line 232, in wait
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     return self._exit_event.wait()
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]            ~~~~~~~~~~~~~~~~~~~~~^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/eventlet/event.py", line 131, in wait
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     current.throw(*self._exc)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     ~~~~~~~~~~~~~^^^^^^^^^^^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/eventlet/greenthread.py", line 272, in main
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     result = function(*args, **kwargs)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/nova/utils.py", line 663, in context_wrapper
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     return func(*args, **kwargs)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/nova/compute/manager.py", line 2018, in _allocate_network_async
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     raise e
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/nova/compute/manager.py", line 1996, in _allocate_network_async
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     nwinfo = self.network_api.allocate_for_instance(
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]             context, instance,
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     ...<3 lines>...
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]             resource_provider_mapping=resource_provider_mapping,
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]             network_arqs=network_arqs)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/nova/network/neutron.py", line 1287, in allocate_for_instance
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     nw_info = self.get_instance_nw_info(
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]         context, instance, networks=ordered_nets,
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]         port_ids=ordered_port_ids,
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]         admin_client=admin_client,
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]         preexisting_port_ids=preexisting_port_ids)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/nova/network/neutron.py", line 2047, in get_instance_nw_info
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     result = self._get_instance_nw_info(context, instance, **kwargs)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/nova/network/neutron.py", line 2073, in _get_instance_nw_info
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     nw_info = self._build_network_info_model(context, instance, networks,
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                                              port_ids, admin_client,
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                                              preexisting_port_ids,
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                                              refresh_vif_id,
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                                              force_refresh=force_refresh)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/nova/network/neutron.py", line 3496, in _build_network_info_model
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     data = client.list_ports(**search_opts)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/nova/network/neutron.py", line 196, in wrapper
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     ret = obj(*args, **kwargs)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/neutronclient/v2_0/client.py", line 815, in list_ports
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     return self.list('ports', self.ports_path, retrieve_all,
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]            ~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                      **_params)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                      ^^^^^^^^^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/nova/network/neutron.py", line 196, in wrapper
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     ret = obj(*args, **kwargs)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/neutronclient/v2_0/client.py", line 372, in list
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     for r in self._pagination(collection, path, **params):
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]              ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/neutronclient/v2_0/client.py", line 387, in _pagination
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     res = self.get(path, params=params)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/nova/network/neutron.py", line 196, in wrapper
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     ret = obj(*args, **kwargs)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/neutronclient/v2_0/client.py", line 356, in get
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     return self.retry_request("GET", action, body=body,
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]            ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                               headers=headers, params=params)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/nova/network/neutron.py", line 196, in wrapper
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     ret = obj(*args, **kwargs)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/neutronclient/v2_0/client.py", line 333, in retry_request
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     return self.do_request(method, action, body=body,
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]            ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                            headers=headers, params=params)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/nova/network/neutron.py", line 196, in wrapper
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     ret = obj(*args, **kwargs)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/neutronclient/v2_0/client.py", line 284, in do_request
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     resp, replybody = self.httpclient.do_request(action, method, body=body,
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                       ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                                                  headers=headers)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                                                  ^^^^^^^^^^^^^^^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/neutronclient/client.py", line 341, in do_request
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     self._check_uri_length(url)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     ~~~~~~~~~~~~~~~~~~~~~~^^^^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/neutronclient/client.py", line 334, in _check_uri_length
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     uri_len = len(self.endpoint_url) + len(url)
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]                   ^^^^^^^^^^^^^^^^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/neutronclient/client.py", line 348, in endpoint_url
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     return self.get_endpoint()
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]            ~~~~~~~~~~~~~~~~~^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]   File "/usr/lib/python3/dist-packages/keystoneauth1/adapter.py", line 330, in get_endpoint
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]     if self.endpoint_override:
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f]        ^^^^^^^^^^^^^^^^^^^^^^
  2025-03-17 11:08:00.390 38463 ERROR nova.compute.manager [instance: 5c6786d9-15c5-414f-990f-eff2bf9f4d1f] AttributeError: 'SessionClient' object has no attribute 'endpoint_override'

  
  This using Plucky Proposed - 25.04
  nova-compute: 3:30.0.0+git2025030311.e6b8b051a9-0ubuntu1

  This nova compute version is a snapshot of current master branch from
  the Nova project, RC1 will soon be available:
  https://review.opendev.org/c/openstack/releases/+/943941

  This happens during testing with Tempest, in tests such as:
  tempest.scenario.test_network_basic_ops.TestNetworkBasicOps.test_network_basic_ops

  Nova should successfully create a VM

  Nova failed to communicate with neutron because of an attribute error

  I've tested the same version of Nova using the Epoxy Cloud archive
  from proposed, and it worked correctly.

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