MatrixManAtYrService opened a new issue, #25585:
URL: https://github.com/apache/airflow/issues/25585
### Apache Airflow version
main (development)
### What happened
I clicked `run` on a dag, and got this error:
```
Python version: 3.9.6
Airflow version: 2.4.0.dev0
Node: ChoedanKal
-------------------------------------------------------------------------------
Traceback (most recent call last):
File
"/home/matt/2022/08/07/venv/lib/python3.9/site-packages/flask/app.py", line
2525, in wsgi_app
response = self.full_dispatch_request()
File
"/home/matt/2022/08/07/venv/lib/python3.9/site-packages/flask/app.py", line
1822, in full_dispatch_request
rv = self.handle_user_exception(e)
File
"/home/matt/2022/08/07/venv/lib/python3.9/site-packages/flask/app.py", line
1820, in full_dispatch_request
rv = self.dispatch_request()
File
"/home/matt/2022/08/07/venv/lib/python3.9/site-packages/flask/app.py", line
1796, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
File "/home/matt/src/airflow/airflow/www/auth.py", line 46, in decorated
return func(*args, **kwargs)
File "/home/matt/src/airflow/airflow/www/decorators.py", line 80, in
wrapper
return f(*args, **kwargs)
File "/home/matt/src/airflow/airflow/utils/session.py", line 71, in wrapper
return func(*args, session=session, **kwargs)
File "/home/matt/src/airflow/airflow/www/views.py", line 2091, in trigger
if unpause and dag.is_paused:
AttributeError: 'NoneType' object has no attribute 'is_paused'
```
I'll comment later if I can replicate it (haven't tried yet) but here's a
gist with the dags involved:
https://gist.github.com/MatrixManAtYrService/d48476594665ba0f8226b1347e1d50f0
First I had `messy.py` in my dags folder. Then I unpaused each task and ran
the ones that say "start". I was expecting the whole mess of dags to
eventually run, but only the start ones did. Then I said to myself:
> self, that's probably a bug, but let's see if we can replicate it with a
simpler DAG, because `messy.py` is messy.
So I deleted `messy.py` and replaced it with `simpler.py`. Then I unpaused
the two new tasks (indicated with "start") and tried to run them. Instead of
running, I got the above error.
### What you think should happen instead
No error, dags should run
### How to reproduce
see above
### Operating System
NixOS (linux)
### Versions of Apache Airflow Providers
n/a
### Deployment
Virtualenv installation
### Deployment details
_No response_
### Anything else
_No response_
### 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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