m1racoli opened a new issue, #53105:
URL: https://github.com/apache/airflow/issues/53105
### Apache Airflow version
3.0.2
### If "Other Airflow 2 version" selected, which one?
_No response_
### What happened?
When setting `PYTHONASYNCIODEBUG=1` the API server isn't able to start and
it's children are in a crash-loop.
### What you think should happen instead?
The API should have started up just fine.
### How to reproduce
Set **.env** file to
```env
PYTHONASYNCIODEBUG=1
```
and **Dockerfile** to
```Dockerfile
FROM astrocrpublic.azurecr.io/runtime:3.0-4
```
Using the astro CLI, run `astro dev start` and the API server will not be
able to serve requests.
### Operating System
Debian GNU/Linux 12 (bookworm)
### Versions of Apache Airflow Providers
apache-airflow-providers-celery==3.11.0
apache-airflow-providers-common-compat==1.7.0
apache-airflow-providers-common-io==1.6.0
apache-airflow-providers-common-sql==1.27.1
apache-airflow-providers-elasticsearch==6.3.0
apache-airflow-providers-mysql==6.3.0
apache-airflow-providers-openlineage==2.3.0
apache-airflow-providers-postgres==6.2.0
apache-airflow-providers-smtp==2.1.0
apache-airflow-providers-standard==1.2.0
### Deployment
Docker-Compose
### Deployment details
_No response_
### Anything else?
API server logs
```
[2025-07-09T19:23:15.640+0000] {runners.py:118} WARNING - Executing <Task
pending name='Task-1' coro=<Server.serve() running at
/usr/local/lib/python3.12/site-packages/uvicorn/server.py:70> wait_for=<Future
pending cb=[Task.task_wakeup()] created at
/usr/local/lib/python3.12/asyncio/locks.py:209>
cb=[run_until_complete.<locals>.done_cb()] created at
/usr/local/lib/python3.12/asyncio/runners.py:100> took 0.628 seconds
INFO: Application startup complete.
INFO: Waiting for child process [184]
INFO: Child process [184] died
/usr/local/lib/python3.12/site-packages/airflow/configuration.py:858
DeprecationWarning: The secret_key option in [webserver] has been moved to the
secret_key option in [api] - the old setting has been used, but please update
your config.
[2025-07-09T19:23:16.816+0000] {plugin.py:125} WARNING - Astro managed
secrets backend is disabled
[2025-07-09T19:23:16.880+0000] {providers_manager.py:953} INFO - The
hook_class 'airflow.providers.standard.hooks.filesystem.FSHook' is not fully
initialized (UI widgets will be missing), because the 'flask_appbuilder'
package is not installed, however it is not required for Airflow components to
work
[2025-07-09T19:23:16.880+0000] {providers_manager.py:953} INFO - The
hook_class 'airflow.providers.standard.hooks.package_index.PackageIndexHook' is
not fully initialized (UI widgets will be missing), because the
'flask_appbuilder' package is not installed, however it is not required for
Airflow components to work
/usr/local/lib/python3.12/site-packages/airflow/api_fastapi/auth/tokens.py:522
DeprecationWarning: The secret_key option in [webserver] has been moved to the
secret_key option in [api] - the old setting has been used, but please update
your config.
INFO: Started server process [195]
INFO: Waiting for application startup.
[2025-07-09T19:23:17.480+0000] {runners.py:118} WARNING - Executing <Task
pending name='Task-1' coro=<Server.serve() running at
/usr/local/lib/python3.12/site-packages/uvicorn/server.py:70> wait_for=<Future
pending cb=[Task.task_wakeup()] created at
/usr/local/lib/python3.12/asyncio/locks.py:209>
cb=[run_until_complete.<locals>.done_cb()] created at
/usr/local/lib/python3.12/asyncio/runners.py:100> took 0.650 seconds
INFO: Application startup complete.
INFO: Waiting for child process [195]
INFO: Child process [195] died
/usr/local/lib/python3.12/site-packages/airflow/configuration.py:858
DeprecationWarning: The secret_key option in [webserver] has been moved to the
secret_key option in [api] - the old setting has been used, but please update
your config.
INFO: Waiting for child process [85]
INFO: Child process [85] died
INFO: Waiting for child process [162]
INFO: Child process [162] died
/usr/local/lib/python3.12/site-packages/airflow/configuration.py:858
DeprecationWarning: The secret_key option in [webserver] has been moved to the
secret_key option in [api] - the old setting has been used, but please update
your config.
```
### Are you willing to submit PR?
- [ ] Yes I am willing to submit a PR!
### Code of Conduct
- [x] I agree to follow this project's [Code of
Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)
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