JarrColl commented on issue #57872:
URL: https://github.com/apache/airflow/issues/57872#issuecomment-3519347661
I'm also having the same error on versions 3.1.1 and 3.1.2, it happens
immediately when loading the webpage.
Using a private browser does not resolve the error in this case. The error
occurs when configuring fab to use the securecookie session backend.
```yaml
[fab]
session_lifetime_minutes = 720
session_backend = securecookie
```
The error doesn't occur after commenting out the above config.
Here is the error:
```
INFO: 10.10.138.220:39824 - "GET /favicon.ico HTTP/1.1" 200 OK
2025-11-12T00:34:06.397819Z [error ] Exception on /login/ [GET]
[airflow.providers.fab.www.app] loc=app.py:1744
Traceback (most recent call last):
File "/home/nbnai_user/.local/lib/python3.12/site-packages/flask/app.py",
line 2528, in wsgi_app
ctx.push()
File "/home/nbnai_user/.local/lib/python3.12/site-packages/flask/ctx.py",
line 375, in push
self.session = session_interface.open_session(self.app, self.request)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/home/nbnai_user/.local/lib/python3.12/site-packages/flask/sessions.py", line
363, in open_session
s = self.get_signing_serializer(app)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/home/nbnai_user/.local/lib/python3.12/site-packages/flask/sessions.py", line
353, in get_signing_serializer
return URLSafeTimedSerializer(
^^^^^^^^^^^^^^^^^^^^^^^
File
"/home/nbnai_user/.local/lib/python3.12/site-packages/itsdangerous/serializer.py",
line 222, in __init__
self.is_text_serializer: bool = is_text_serializer(serializer)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/home/nbnai_user/.local/lib/python3.12/site-packages/itsdangerous/serializer.py",
line 39, in is_text_serializer
return isinstance(serializer.dumps({}), str)
^^^^^^^^^^^^^^^^
AttributeError: '_LazySafeSerializer' object has no attribute 'dumps'
INFO: 10.10.138.220:39824 - "GET /auth/login/ HTTP/1.1" 500 Internal
Server Error
ERROR: Exception in ASGI application
+ Exception Group Traceback (most recent call last):
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/uvicorn/protocols/http/httptools_impl.py",
line 409, in run_asgi
| result = await app( # type: ignore[func-returns-value]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/fastapi/applications.py",
line 1082, in __call__
| await super().__call__(scope, receive, send)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/applications.py",
line 113, in __call__
| await self.middleware_stack(scope, receive, send)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/middleware/errors.py",
line 186, in __call__
| raise exc
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/middleware/errors.py",
line 164, in __call__
| await self.app(scope, receive, _send)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/middleware/gzip.py",
line 29, in __call__
| await responder(scope, receive, send)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/middleware/gzip.py",
line 130, in __call__
| await super().__call__(scope, receive, send)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/middleware/gzip.py",
line 46, in __call__
| await self.app(scope, receive, self.send_with_compression)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/middleware/cors.py",
line 85, in __call__
| await self.app(scope, receive, send)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/middleware/exceptions.py",
line 63, in __call__
| await wrap_app_handling_exceptions(self.app, conn)(scope, receive,
send)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/_exception_handler.py",
line 53, in wrapped_app
| raise exc
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/_exception_handler.py",
line 42, in wrapped_app
| await app(scope, receive, sender)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/routing.py",
line 716, in __call__
| await self.middleware_stack(scope, receive, send)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/routing.py",
line 736, in app
| await route.handle(scope, receive, send)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/routing.py",
line 462, in handle
| await self.app(scope, receive, send)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/fastapi/applications.py",
line 1082, in __call__
| await super().__call__(scope, receive, send)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/applications.py",
line 113, in __call__
| await self.middleware_stack(scope, receive, send)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/middleware/errors.py",
line 186, in __call__
| raise exc
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/middleware/errors.py",
line 164, in __call__
| await self.app(scope, receive, _send)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/middleware/exceptions.py",
line 63, in __call__
| await wrap_app_handling_exceptions(self.app, conn)(scope, receive,
send)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/_exception_handler.py",
line 53, in wrapped_app
| raise exc
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/_exception_handler.py",
line 42, in wrapped_app
| await app(scope, receive, sender)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/routing.py",
line 716, in __call__
| await self.middleware_stack(scope, receive, send)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/routing.py",
line 736, in app
| await route.handle(scope, receive, send)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/routing.py",
line 462, in handle
| await self.app(scope, receive, send)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/middleware/wsgi.py",
line 81, in __call__
| await responder(receive, send)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/middleware/wsgi.py",
line 106, in __call__
| async with anyio.create_task_group() as task_group:
| ^^^^^^^^^^^^^^^^^^^^^^^^^
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/anyio/_backends/_asyncio.py",
line 781, in __aexit__
| raise BaseExceptionGroup(
| ExceptionGroup: unhandled errors in a TaskGroup (1 sub-exception)
+-+---------------- 1 ----------------
| Traceback (most recent call last):
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/flask/app.py", line 2528,
in wsgi_app
| ctx.push()
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/flask/ctx.py", line 375,
in push
| self.session = session_interface.open_session(self.app,
self.request)
|
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/flask/sessions.py", line
363, in open_session
| s = self.get_signing_serializer(app)
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/flask/sessions.py", line
353, in get_signing_serializer
| return URLSafeTimedSerializer(
| ^^^^^^^^^^^^^^^^^^^^^^^
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/itsdangerous/serializer.py",
line 222, in __init__
| self.is_text_serializer: bool = is_text_serializer(serializer)
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/itsdangerous/serializer.py",
line 39, in is_text_serializer
| return isinstance(serializer.dumps({}), str)
| ^^^^^^^^^^^^^^^^
| AttributeError: '_LazySafeSerializer' object has no attribute 'dumps'
|
| During handling of the above exception, another exception occurred:
|
| Traceback (most recent call last):
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/middleware/wsgi.py",
line 109, in __call__
| await anyio.to_thread.run_sync(self.wsgi, environ,
self.start_response)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/anyio/to_thread.py", line
56, in run_sync
| return await get_async_backend().run_sync_in_worker_thread(
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/anyio/_backends/_asyncio.py",
line 2485, in run_sync_in_worker_thread
| return await future
| ^^^^^^^^^^^^
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/anyio/_backends/_asyncio.py",
line 976, in run
| result = context.run(func, *args)
| ^^^^^^^^^^^^^^^^^^^^^^^^
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/starlette/middleware/wsgi.py",
line 147, in wsgi
| for chunk in self.app(environ, start_response):
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/flask/app.py", line 2552,
in __call__
| return self.wsgi_app(environ, start_response)
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/werkzeug/middleware/proxy_fix.py",
line 187, in __call__
| return self.app(environ, start_response)
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/flask/app.py", line 2532,
in wsgi_app
| response = self.handle_exception(e)
| ^^^^^^^^^^^^^^^^^^^^^^^^
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/flask/app.py", line 1727,
in handle_exception
| server_error = self.ensure_sync(handler)(server_error)
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/airflow/providers/fab/www/views.py",
line 88, in show_traceback
| return render_template("airflow/traceback.html"), 500
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/flask/templating.py",
line 147, in render_template
| return _render(app, template, context)
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/flask/templating.py",
line 128, in _render
| app.update_template_context(context)
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/flask/app.py", line 997,
in update_template_context
| context.update(func())
| ^^^^^^
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/flask_login/utils.py",
line 405, in _user_context_processor
| return dict(current_user=_get_user())
| ^^^^^^^^^^^
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/flask_login/utils.py",
line 370, in _get_user
| current_app.login_manager._load_user()
| File
"/home/nbnai_user/.local/lib/python3.12/site-packages/flask_login/login_manager.py",
line 362, in _load_user
| user_id = session.get("_user_id")
| ^^^^^^^^^^^
| AttributeError: 'NoneType' object has no attribute 'get'
+------------------------------------
```
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