anavrotski commented on issue #59349:
URL: https://github.com/apache/airflow/issues/59349#issuecomment-3763664082
FAB provider v. 3.1.2 was just released. If Airflow 3.1.6 with FAB 3.1.1
fails after some time, with 3.1.2 it fails immediately.
```
wait-for-airflow-migrations 2026-01-17T13:00:00.665096Z [info [] Context
impl MySQLImpl. [alembic.runtime.migration] loc=migration.py:211
wait-for-airflow-migrations 2026-01-17T13:00:00.665517Z [info [] Will
assume non-transactional DDL. [alembic.runtime.migration] loc=migration.py:214
api-server | await self.middleware_stack(scope, receive, send)
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/starlette/middleware/errors.py",
line 186, in __call__
api-server | raise exc
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/starlette/middleware/errors.py",
line 164, in __call__
api-server | await self.app(scope, receive, _send)
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/starlette/middleware/exceptions.py",
line 63, in __call__
api-server | await wrap_app_handling_exceptions(self.app, conn)(scope,
receive, send)
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/starlette/_exception_handler.py",
line 53, in wrapped_app
api-server | raise exc
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/starlette/_exception_handler.py",
line 42, in wrapped_app
api-server | await app(scope, receive, sender)
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/starlette/routing.py", line
716, in __call__
api-server | await self.middleware_stack(scope, receive, send)
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/starlette/routing.py", line
736, in app
api-server | await route.handle(scope, receive, send)
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/starlette/routing.py", line
462, in handle
api-server | await self.app(scope, receive, send)
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/starlette/middleware/wsgi.py",
line 81, in __call__
api-server | await responder(receive, send)
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/starlette/middleware/wsgi.py",
line 106, in __call__
api-server | async with anyio.create_task_group() as task_group:
api-server | ^^^^^^^^^^^^^^^^^^^^^^^^^
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/anyio/_backends/_asyncio.py",
line 783, in __aexit__
api-server | raise BaseExceptionGroup(
api-server | ExceptionGroup: unhandled errors in a TaskGroup (1
sub-exception)
api-server +-+---------------- 1 ----------------
api-server | Traceback (most recent call last):
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/flask/app.py", line 2528, in
wsgi_app
api-server | ctx.push()
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/flask/ctx.py", line 375, in
push
api-server | self.session = session_interface.open_session(self.app,
self.request)
api-server |
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/flask_session/base.py", line
350, in open_session
api-server | saved_session_data =
self._retrieve_session_data(store_id)
api-server |
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/flask_session/_utils.py",
line 56, in wrapper
api-server | raise e
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/flask_session/_utils.py",
line 52, in wrapper
api-server | return func(*args, **kwargs)
api-server | ^^^^^^^^^^^^^^^^^^^^^
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/flask_session/sqlalchemy/sqlalchemy.py",
line 152, in _retrieve_session_data
api-server | return self.serializer.decode(serialized_session_data)
api-server | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/airflow/providers/fab/www/session.py",
line 35, in loads
api-server | return decoder.decode(data)
api-server | ^^^^^^^^^^^^^^^^^^^^
api-server | msgspec.DecodeError: MessagePack data is malformed:
trailing characters (byte 1)
api-server |
api-server | During handling of the above exception, another exception
occurred:
api-server |
api-server | Traceback (most recent call last):
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/starlette/middleware/wsgi.py",
line 109, in __call__
api-server | await anyio.to_thread.run_sync(self.wsgi, environ,
self.start_response)
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/anyio/to_thread.py", line
63, in run_sync
api-server | return await
get_async_backend().run_sync_in_worker_thread(
api-server |
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/anyio/_backends/_asyncio.py",
line 2502, in run_sync_in_worker_thread
api-server | return await future
api-server | ^^^^^^^^^^^^
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/anyio/_backends/_asyncio.py",
line 986, in run
api-server | result = context.run(func, *args)
api-server | ^^^^^^^^^^^^^^^^^^^^^^^^
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/starlette/middleware/wsgi.py",
line 147, in wsgi
api-server | for chunk in self.app(environ, start_response):
api-server | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/flask/app.py", line 2552, in
__call__
api-server | return self.wsgi_app(environ, start_response)
api-server | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/werkzeug/middleware/proxy_fix.py",
line 187, in __call__
api-server | return self.app(environ, start_response)
api-server | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/flask/app.py", line 2532, in
wsgi_app
api-server | response = self.handle_exception(e)
api-server | ^^^^^^^^^^^^^^^^^^^^^^^^
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/flask/app.py", line 1727, in
handle_exception
api-server | server_error = self.ensure_sync(handler)(server_error)
api-server | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/airflow/providers/fab/www/views.py",
line 75, in show_traceback
api-server | return render_template("airflow/traceback.html"), 500
api-server | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/flask/templating.py", line
147, in render_template
api-server | return _render(app, template, context)
api-server | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/flask/templating.py", line
128, in _render
api-server | app.update_template_context(context)
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/flask/app.py", line 997, in
update_template_context
api-server | context.update(func())
api-server | ^^^^^^
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/flask_login/utils.py", line
405, in _user_context_processor
api-server | return dict(current_user=_get_user())
api-server | ^^^^^^^^^^^
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/flask_login/utils.py", line
370, in _get_user
api-server | current_app.login_manager._load_user()
api-server | File
"/home/airflow/.local/lib/python3.12/site-packages/flask_login/login_manager.py",
line 362, in _load_user
api-server | user_id = session.get("_user_id")
api-server | ^^^^^^^^^^^
api-server | AttributeError: 'NoneType' object has no attribute 'get'
api-server +------------------------------------
api-server INFO: 172.25.123.143:41326 - "GET /api/v2/version HTTP/1.1"
200 OK
api-server INFO: 172.25.123.143:41334 - "GET /api/v2/version HTTP/1.1"
200 OK
```
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