raphaelauv opened a new issue #18936:
URL: https://github.com/apache/airflow/issues/18936
### Apache Airflow version
2.1.2
### Operating System
GCP Container-Optimized OS
### Versions of Apache Airflow Providers
apache-airflow-providers-cncf-kubernetes==2.0.2
apache-airflow-providers-slack[http]==4.1.0
### Deployment
Composer
### Deployment details
_No response_
### What happened
I Had 2 dags file with same dag name , just after deleted 1 of them and
doing a F5 on the dag ui of the webserver it crash with :
```log
Something bad has happened.
Please consider letting us know by creating a bug report using GitHub.
Python version: 3.8.12
Airflow version: 2.1.2+composer
Node: airflow-webserver-XXXXXXXX
-------------------------------------------------------------------------------
Traceback (most recent call last):
File "/opt/python3.8/lib/python3.8/site-packages/flask/app.py", line 2447,
in wsgi_app
response = self.full_dispatch_request()
File "/opt/python3.8/lib/python3.8/site-packages/flask/app.py", line 1952,
in full_dispatch_request
rv = self.handle_user_exception(e)
File "/opt/python3.8/lib/python3.8/site-packages/flask/app.py", line 1821,
in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/opt/python3.8/lib/python3.8/site-packages/flask/_compat.py", line
39, in reraise
raise value
File "/opt/python3.8/lib/python3.8/site-packages/flask/app.py", line 1950,
in full_dispatch_request
rv = self.dispatch_request()
File "/opt/python3.8/lib/python3.8/site-packages/flask/app.py", line 1936,
in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/opt/python3.8/lib/python3.8/site-packages/airflow/www/auth.py",
line 34, in decorated
return func(*args, **kwargs)
File
"/opt/python3.8/lib/python3.8/site-packages/airflow/utils/session.py", line 70,
in wrapper
return func(*args, session=session, **kwargs)
File "/opt/python3.8/lib/python3.8/site-packages/airflow/www/views.py",
line 888, in code
return self.render_template(
File "/opt/python3.8/lib/python3.8/site-packages/airflow/www/views.py",
line 438, in render_template
return super().render_template(
File
"/opt/python3.8/lib/python3.8/site-packages/flask_appbuilder/baseviews.py",
line 287, in render_template
return render_template(
File "/opt/python3.8/lib/python3.8/site-packages/flask/templating.py",
line 137, in render_template
return _render(
File "/opt/python3.8/lib/python3.8/site-packages/flask/templating.py",
line 119, in _render
before_render_template.send(app, template=template, context=context)
File "/opt/python3.8/lib/python3.8/site-packages/blinker/base.py", line
266, in send
return [(receiver, receiver(sender, **kwargs))
File "/opt/python3.8/lib/python3.8/site-packages/blinker/base.py", line
266, in <listcomp>
return [(receiver, receiver(sender, **kwargs))
File "/opt/python3.8/lib/python3.8/site-packages/airflow/www/views.py",
line 455, in add_user_permissions_to_dag
can_create_dag_run = current_app.appbuilder.sm.has_access(
File "/opt/python3.8/lib/python3.8/site-packages/airflow/www/security.py",
line 403, in has_access
has_access = self._has_view_access(user, permission, resource)
File
"/opt/python3.8/lib/python3.8/site-packages/flask_appbuilder/security/manager.py",
line 1389, in _has_view_access
roles = user.roles
File "/opt/python3.8/lib/python3.8/site-packages/werkzeug/local.py", line
347, in __getattr__
return getattr(self._get_current_object(), name)
File
"/opt/python3.8/lib/python3.8/site-packages/sqlalchemy/orm/attributes.py", line
294, in __get__
return self.impl.get(instance_state(instance), dict_)
File
"/opt/python3.8/lib/python3.8/site-packages/sqlalchemy/orm/attributes.py", line
730, in get
value = self.callable_(state, passive)
File
"/opt/python3.8/lib/python3.8/site-packages/sqlalchemy/orm/strategies.py", line
717, in _load_for_state
raise orm_exc.DetachedInstanceError(
sqlalchemy.orm.exc.DetachedInstanceError: Parent instance <User at
0x7f8cfafbec40> is not bound to a Session; lazy load operation of attribute
'roles' cannot proceed (Background on this error at:
http://sqlalche.me/e/13/bhk3)
```
### What you expected to happen
I'm not sure if that bug is really critical
### How to reproduce
2 dags with same name in 2 two different file name
open the webserver ui on the dag
delete 1 file from the scheduler
F5 on the webserver ui page of the dag
### 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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