pulpcore-content 3.101.0 doesn't start with uvloop

[philfry]

Version
pulp-container 2.27.0
pulp-file 1.16.0
pulp-glue 0.37.0
pulp-rpm 3.34.0
pulpcore 3.101.0
uvloop 0.22.1

Describe the bug
After upgrading pulpcore from 3.84.0 (and moving from python 3.9 to python 3.11 or python 3.12 (doesn't matter)) I found that pulpcore-content failed to start:

/usr/local/lib/pulp/lib64/python3.11/site-packages/django/db/backends/utils.py:98: RuntimeWarning: Accessing the database during app initialization is discouraged. To fix this warning, avoid executing queries in AppConfig.ready() or when your app modules are imported.
  warnings.warn(self.APPS_NOT_READY_WARNING_MSG, category=RuntimeWarning)
pulp [None]: pulpcore.content:INFO: Using uvloop as the asyncio event loop.
[2026-01-15 08:43:04 +0000] [389909] [INFO] Starting gunicorn 23.0.0
[2026-01-15 08:43:04 +0000] [389909] [INFO] Listening at: http://[::]:24816 (389909)
[2026-01-15 08:43:04 +0000] [389909] [INFO] Using worker: aiohttp.GunicornUVLoopWebWorker
[2026-01-15 08:43:04 +0000] [389914] [INFO] Booting worker with pid: 389914
[2026-01-15 08:43:04 +0000] [389914] [ERROR] Exception in worker process
Traceback (most recent call last):
  File "/usr/local/lib/pulp/lib64/python3.11/site-packages/gunicorn/arbiter.py", line 608, in spawn_worker
    worker.init_process()
  File "/usr/local/lib/pulp/lib64/python3.11/site-packages/aiohttp/worker.py", line 255, in init_process
    super().init_process()
  File "/usr/local/lib/pulp/lib64/python3.11/site-packages/aiohttp/worker.py", line 52, in init_process
    asyncio.get_event_loop().close()
    ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/pulp/lib64/python3.11/site-packages/uvloop/__init__.py", line 206, in get_event_loop
    raise RuntimeError(
RuntimeError: There is no current event loop in thread 'MainThread'.
[2026-01-15 08:43:04 +0000] [389914] [INFO] Worker exiting (pid: 389914)
[2026-01-15 08:43:05 +0000] [389909] [ERROR] Worker (pid:389914) exited with code 3
[2026-01-15 08:43:05 +0000] [389909] [ERROR] Shutting down: Master
[2026-01-15 08:43:05 +0000] [389909] [ERROR] Reason: Worker failed to boot.

By setting UVLOOP_ENABLED = False it still gives the warning, but at least it starts and works:

/usr/local/lib/pulp/lib64/python3.11/site-packages/django/db/backends/utils.py:98: RuntimeWarning: Accessing the database during app initialization is discouraged. To fix this warning, avoid executing queries in AppConfig.ready() or when your app modules are imported.
   warnings.warn(self.APPS_NOT_READY_WARNING_MSG, category=RuntimeWarning)

To Reproduce

• create python3.11 or python3.12 venv
• pip install pulpcore pulpcore[uvloop] pulp-file
• set UVLOOP_ENABLED = True in settings.py
• start pulpcore-content

Expected behavior
pulpcore-content starts without warnings or errors

Additional context

[pedro-psb]

I confirm there is a regression, but it's in pulpcore==3.92.

A tangent to this, but you shouldn't be installing pulp_file. Its code was merged into pulpcore a long time ago and it's not being developed as a separate plugin (see archived repo).

The reproducer (using the other uv)

$ cat settings.py
UVLOOP_ENABLED=True
FILE_UPLOAD_TEMP_DIR = "/tmp/pulp/"
WORKING_DIRECTORY = "/tmp/pulp/"
DB_ENCRYPTION_KEY = "/tmp/pulp/database_fields.symmetrics.key"

$ export PULP_DJANGO_SETTINGS_FILE=$PWD/settings.py

$ uv run --python 3.11 --with pulpcore[uvloop]==3.91 --with 'pycares<5' pulpcore-content
pulp [None]: pulpcore.content:INFO: Using uvloop as the asyncio event loop.
[2026-01-15 14:18:29 +0000] [1413878] [INFO] Starting gunicorn 23.0.0
[2026-01-15 14:18:29 +0000] [1413878] [INFO] Listening at: http://[::]:24816 (1413878)
[2026-01-15 14:18:29 +0000] [1413878] [INFO] Using worker: aiohttp.GunicornUVLoopWebWorker
[2026-01-15 14:18:29 +0000] [1413880] [INFO] Booting worker with pid: 1413880


$ uv run --python 3.11 --with pulpcore[uvloop]==3.92 --with 'pycares<5' pulpcore-content
pulp [None]: pulpcore.content:INFO: Using uvloop as the asyncio event loop.
[2026-01-15 14:19:35 +0000] [1414034] [INFO] Starting gunicorn 23.0.0
[2026-01-15 14:19:35 +0000] [1414034] [INFO] Listening at: http://[::]:24816 (1414034)
[2026-01-15 14:19:35 +0000] [1414034] [INFO] Using worker: aiohttp.GunicornUVLoopWebWorker
[2026-01-15 14:19:35 +0000] [1414035] [INFO] Booting worker with pid: 1414035
[2026-01-15 14:19:35 +0000] [1414035] [ERROR] Exception in worker process
Traceback (most recent call last):
  File "/.../lib/python3.11/site-packages/gunicorn/arbiter.py", line 608, in spawn_worker
    worker.init_process()
  File "/.../lib/python3.11/site-packages/aiohttp/worker.py", line 255, in init_process
    super().init_process()
  File "/.../lib/python3.11/site-packages/aiohttp/worker.py", line 52, in init_process
    asyncio.get_event_loop().close()
    ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/.../lib/python3.11/site-packages/uvloop/__init__.py", line 206, in get_event_loop
    raise RuntimeError(
RuntimeError: There is no current event loop in thread 'MainThread'.
[2026-01-15 14:19:35 +0000] [1414035] [INFO] Worker exiting (pid: 1414035)
[2026-01-15 14:19:35 +0000] [1414034] [ERROR] Worker (pid:1414035) exited with code 3
[2026-01-15 14:19:35 +0000] [1414034] [ERROR] Shutting down: Master
[2026-01-15 14:19:35 +0000] [1414034] [ERROR] Reason: Worker failed to boot.

[philfry]

A tangent to this, but you shouldn't be installing pulp_file. Its code was merged into pulpcore a long time ago and it's not being developed as a separate plugin (see archived repo).

Ah, thanks, I missed that one.