Opened 3 years ago
Last modified 2 years ago
#34451 assigned Bug
Incorrect exception handling within the django exception handler
| Reported by: | Michael Galler | Owned by: | Akshat verma |
|---|---|---|---|
| Component: | Error reporting | Version: | 4.1 |
| Severity: | Normal | Keywords: | |
| Cc: | asgi | Triage Stage: | Accepted |
| Has patch: | no | Needs documentation: | no |
| Needs tests: | no | Patch needs improvement: | no |
| Easy pickings: | no | UI/UX: | no |
Description (last modified by )
start with
django-admin startproject myproject
views.py
from django.views.generic import FormView
class TestView(FormView):
async def post(self, request, *args, **kwargs):
return 'Foobar'
urls.py
from django.contrib import admin
from django.urls import path
from myproject.views import TestView
urlpatterns = [
path('admin/', admin.site.urls),
path('test/', TestView.as_view()),
]
This should raise
django.core.exceptions.ImproperlyConfigured: TestView HTTP handlers must either be all sync or all async.
Running the devserver via manage.py results in
C:\code\myproject\venv\Scripts\python.exe C:\code\myproject\manage.py runserver 8000
Performing system checks...
Watching for file changes with StatReloader
Exception in thread django-main-thread:
Traceback (most recent call last):
File "C:\Program Files\Python311\Lib\threading.py", line 1038, in _bootstrap_inner
self.run()
File "C:\Program Files\Python311\Lib\threading.py", line 975, in run
self._target(*self._args, **self._kwargs)
File "C:\code\myproject\venv\Lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "C:\code\myproject\venv\Lib\site-packages\django\core\management\commands\runserver.py", line 134, in inner_run
self.check(display_num_errors=True)
File "C:\code\myproject\venv\Lib\site-packages\django\core\management\base.py", line 475, in check
all_issues = checks.run_checks(
^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\core\checks\registry.py", line 88, in run_checks
new_errors = check(app_configs=app_configs, databases=databases)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\core\checks\urls.py", line 14, in check_url_config
return check_resolver(resolver)
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\core\checks\urls.py", line 24, in check_resolver
return check_method()
^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\urls\resolvers.py", line 494, in check
for pattern in self.url_patterns:
^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\utils\functional.py", line 57, in __get__
res = instance.__dict__[self.name] = self.func(instance)
^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\urls\resolvers.py", line 715, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\utils\functional.py", line 57, in __get__
res = instance.__dict__[self.name] = self.func(instance)
^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\urls\resolvers.py", line 708, in urlconf_module
return import_module(self.urlconf_name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\importlib\__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "<frozen importlib._bootstrap>", line 1206, in _gcd_import
File "<frozen importlib._bootstrap>", line 1178, in _find_and_load
File "<frozen importlib._bootstrap>", line 1149, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 940, in exec_module
File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
File "C:\code\myproject\myproject\urls.py", line 8, in <module>
path('test/', TestView.as_view()),
^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\views\generic\base.py", line 119, in as_view
if cls.view_is_async:
^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\utils\functional.py", line 71, in __get__
return self.fget(cls)
^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\views\generic\base.py", line 73, in view_is_async
raise ImproperlyConfigured(
django.core.exceptions.ImproperlyConfigured: TestView HTTP handlers must either be all sync or all async.
Now the same thing with hypercorn will result in some sort of recursion that I do not understand.
Uvicorn behaves the same way.
(venv) λ hypercorn myproject.asgi:application
[2023-03-31 11:54:00 +0200] [16000] [WARNING] ASGI Framework Lifespan error, continuing without Lifespan support
[2023-03-31 11:54:00 +0200] [16000] [INFO] Running on http://127.0.0.1:8000 (CTRL + C to quit)
[2023-03-31 11:54:08 +0200] [16000] [ERROR] Error in ASGI Framework
Traceback (most recent call last):
File "C:\code\myproject\venv\Lib\site-packages\asgiref\sync.py", line 486, in thread_handler
raise exc_info[1]
File "C:\code\myproject\venv\Lib\site-packages\django\core\handlers\exception.py", line 43, in inner
response = await get_response(request)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\core\handlers\base.py", line 235, in _get_response_async
callback, callback_args, callback_kwargs = self.resolve_request(request)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\core\handlers\base.py", line 313, in resolve_request
resolver_match = resolver.resolve(request.path_info)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\urls\resolvers.py", line 663, in resolve
for pattern in self.url_patterns:
^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\utils\functional.py", line 57, in __get__
res = instance.__dict__[self.name] = self.func(instance)
^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\urls\resolvers.py", line 715, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\utils\functional.py", line 57, in __get__
res = instance.__dict__[self.name] = self.func(instance)
^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\urls\resolvers.py", line 708, in urlconf_module
return import_module(self.urlconf_name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\importlib\__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "<frozen importlib._bootstrap>", line 1206, in _gcd_import
File "<frozen importlib._bootstrap>", line 1178, in _find_and_load
File "<frozen importlib._bootstrap>", line 1149, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 940, in exec_module
File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
File "C:\code\myproject\myproject\urls.py", line 8, in <module>
path('test/', TestView.as_view()),
^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\views\generic\base.py", line 119, in as_view
if cls.view_is_async:
^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\utils\functional.py", line 71, in __get__
return self.fget(cls)
^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\views\generic\base.py", line 73, in view_is_async
raise ImproperlyConfigured(
django.core.exceptions.ImproperlyConfigured: TestView HTTP handlers must either be all sync or all async.
During handling of the above exception, another exception occurred:
... (the same frame over and over again)
In my personal project this leads to a strange problem with django-ninja
api.py
from ninja import NinjaAPI api = NinjaAPI()
urls.py
from django.contrib import admin
from django.urls import path
from myproject.api import api
from myproject.views import TestView
urlpatterns = [
path('admin/', admin.site.urls),
path("api/", api.urls),
path('test/', TestView.as_view()),
]
manage.py devserver:
C:\code\myproject\venv\Scripts\python.exe C:\code\myproject\manage.py runserver 8000
Watching for file changes with StatReloader
Performing system checks...
Exception in thread django-main-thread:
Traceback (most recent call last):
File "C:\Program Files\Python311\Lib\threading.py", line 1038, in _bootstrap_inner
self.run()
File "C:\Program Files\Python311\Lib\threading.py", line 975, in run
self._target(*self._args, **self._kwargs)
File "C:\code\myproject\venv\Lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "C:\code\myproject\venv\Lib\site-packages\django\core\management\commands\runserver.py", line 134, in inner_run
self.check(display_num_errors=True)
File "C:\code\myproject\venv\Lib\site-packages\django\core\management\base.py", line 475, in check
all_issues = checks.run_checks(
^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\core\checks\registry.py", line 88, in run_checks
new_errors = check(app_configs=app_configs, databases=databases)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\core\checks\urls.py", line 14, in check_url_config
return check_resolver(resolver)
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\core\checks\urls.py", line 24, in check_resolver
return check_method()
^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\urls\resolvers.py", line 494, in check
for pattern in self.url_patterns:
^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\utils\functional.py", line 57, in __get__
res = instance.__dict__[self.name] = self.func(instance)
^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\urls\resolvers.py", line 715, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\utils\functional.py", line 57, in __get__
res = instance.__dict__[self.name] = self.func(instance)
^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\urls\resolvers.py", line 708, in urlconf_module
return import_module(self.urlconf_name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\importlib\__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "<frozen importlib._bootstrap>", line 1206, in _gcd_import
File "<frozen importlib._bootstrap>", line 1178, in _find_and_load
File "<frozen importlib._bootstrap>", line 1149, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 940, in exec_module
File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
File "C:\code\myproject\myproject\urls.py", line 10, in <module>
path('test/', TestView.as_view()),
^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\views\generic\base.py", line 119, in as_view
if cls.view_is_async:
^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\utils\functional.py", line 71, in __get__
return self.fget(cls)
^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\views\generic\base.py", line 73, in view_is_async
raise ImproperlyConfigured(
django.core.exceptions.ImproperlyConfigured: TestView HTTP handlers must either be all sync or all async.
With hypercorn:
(venv) λ hypercorn myproject.asgi:application
[2023-03-31 12:03:33 +0200] [20028] [WARNING] ASGI Framework Lifespan error, continuing without Lifespan support
[2023-03-31 12:03:33 +0200] [20028] [INFO] Running on http://127.0.0.1:8000 (CTRL + C to quit)
[2023-03-31 12:03:40 +0200] [20028] [ERROR] Error in ASGI Framework
Traceback (most recent call last):
File "C:\code\myproject\venv\Lib\site-packages\asgiref\sync.py", line 486, in thread_handler
raise exc_info[1]
File "C:\code\myproject\venv\Lib\site-packages\django\core\handlers\exception.py", line 43, in inner
response = await get_response(request)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\core\handlers\base.py", line 235, in _get_response_async
callback, callback_args, callback_kwargs = self.resolve_request(request)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\core\handlers\base.py", line 313, in resolve_request
resolver_match = resolver.resolve(request.path_info)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\urls\resolvers.py", line 663, in resolve
for pattern in self.url_patterns:
^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\utils\functional.py", line 57, in __get__
res = instance.__dict__[self.name] = self.func(instance)
^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\urls\resolvers.py", line 715, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\utils\functional.py", line 57, in __get__
res = instance.__dict__[self.name] = self.func(instance)
^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\urls\resolvers.py", line 708, in urlconf_module
return import_module(self.urlconf_name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\importlib\__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "<frozen importlib._bootstrap>", line 1206, in _gcd_import
File "<frozen importlib._bootstrap>", line 1178, in _find_and_load
File "<frozen importlib._bootstrap>", line 1149, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 940, in exec_module
File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
File "C:\code\myproject\myproject\urls.py", line 10, in <module>
path('test/', TestView.as_view()),
^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\views\generic\base.py", line 119, in as_view
if cls.view_is_async:
^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\utils\functional.py", line 71, in __get__
return self.fget(cls)
^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\views\generic\base.py", line 73, in view_is_async
raise ImproperlyConfigured(
django.core.exceptions.ImproperlyConfigured: TestView HTTP handlers must either be all sync or all async.
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\code\myproject\venv\Lib\site-packages\asgiref\sync.py", line 486, in thread_handler
raise exc_info[1]
File "C:\code\myproject\venv\Lib\site-packages\django\core\handlers\exception.py", line 43, in inner
response = await get_response(request)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\utils\deprecation.py", line 152, in __acall__
response = response or await self.get_response(request)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\core\handlers\exception.py", line 45, in inner
response = await sync_to_async(
^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\asgiref\sync.py", line 448, in __call__
ret = await asyncio.wait_for(future, timeout=None)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\asyncio\tasks.py", line 442, in wait_for
return await fut
^^^^^^^^^
File "C:\Program Files\Python311\Lib\concurrent\futures\thread.py", line 58, in run
result = self.fn(*self.args, **self.kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\asgiref\sync.py", line 488, in thread_handler
return func(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\core\handlers\exception.py", line 141, in response_for_exception
response = handle_uncaught_exception(
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\core\handlers\exception.py", line 182, in handle_uncaught_exception
return debug.technical_500_response(request, *exc_info)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\views\debug.py", line 66, in technical_500_response
html = reporter.get_traceback_html()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\views\debug.py", line 396, in get_traceback_html
c = Context(self.get_traceback_data(), use_l10n=False)
^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\views\debug.py", line 381, in get_traceback_data
c["raising_view_name"] = get_caller(self.request)
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\views\debug.py", line 99, in get_caller
resolver_match = resolve(request.path)
^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\urls\base.py", line 24, in resolve
return get_resolver(urlconf).resolve(path)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\urls\resolvers.py", line 663, in resolve
for pattern in self.url_patterns:
^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\utils\functional.py", line 57, in __get__
res = instance.__dict__[self.name] = self.func(instance)
^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\urls\resolvers.py", line 715, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\utils\functional.py", line 57, in __get__
res = instance.__dict__[self.name] = self.func(instance)
^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\urls\resolvers.py", line 708, in urlconf_module
return import_module(self.urlconf_name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\importlib\__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "<frozen importlib._bootstrap>", line 1206, in _gcd_import
File "<frozen importlib._bootstrap>", line 1178, in _find_and_load
File "<frozen importlib._bootstrap>", line 1149, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 940, in exec_module
File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
File "C:\code\myproject\myproject\urls.py", line 9, in <module>
path("api/", api.urls),
^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\ninja\main.py", line 379, in urls
self._validate()
File "C:\code\myproject\venv\Lib\site-packages\ninja\main.py", line 494, in _validate
raise ConfigError(msg.strip())
ninja.errors.ConfigError: Looks like you created multiple NinjaAPIs or TestClients
To let ninja distinguish them you need to set either unique version or urls_namespace
- NinjaAPI(..., version='2.0.0')
- NinjaAPI(..., urls_namespace='otherapi')
Already registered: ['api-1.0.0']
During handling of the above exception, another exception occurred:
... (the same frame over and over again)
Change History (7)
comment:1 by , 3 years ago
| Description: | modified (diff) |
|---|
comment:2 by , 3 years ago
| Description: | modified (diff) |
|---|
comment:3 by , 3 years ago
| Cc: | added |
|---|---|
| Component: | Uncategorized → Core (Other) |
| Resolution: | → invalid |
| Status: | new → closed |
follow-up: 6 comment:4 by , 3 years ago
| Resolution: | invalid |
|---|---|
| Status: | closed → new |
| Summary: | Incorrect handling of ImproperlyConfigured Exception in views in ASGI context → Incorrect exception handling within the django exception handler |
After some digging I am sure that this is a django problem.
The problem also occurs in wsgi mode, tested with waitress.
The devserver already does several checks before it starts which are not done by asgi/wsgi handlers.
These checks already detect the problem and prevent the start of the http server.
if i disable the checks in the following file
venv/Lib/site-packages/django/core/management/base.py
def check(
self,
app_configs=None,
tags=None,
display_num_errors=False,
include_deployment_checks=False,
fail_level=checks.ERROR,
databases=None,
):
"""
Use the system check framework to validate entire Django project.
Raise CommandError for any serious message (error or critical errors).
If there are only light messages (like warnings), print them to stderr
and don't raise an exception.
"""
return
Now the devserver behaves the same way
File "C:\code\myproject\venv\Lib\site-packages\django\core\handlers\base.py", line 141, in get_response
response = self._middleware_chain(request)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\core\handlers\exception.py", line 58, in inner
response = response_for_exception(request, exc)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\core\handlers\exception.py", line 141, in response_for_exception
response = handle_uncaught_exception(
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\core\handlers\exception.py", line 185, in handle_uncaught_exception
callback = resolver.resolve_error_handler(500)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\urls\resolvers.py", line 729, in resolve_error_handler
callback = getattr(self.urlconf_module, "handler%s" % view_type, None)
^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\utils\functional.py", line 57, in __get__
res = instance.__dict__[self.name] = self.func(instance)
^^^^^^^^^^^^^^^^^^^
File "C:\code\myproject\venv\Lib\site-packages\django\urls\resolvers.py", line 708, in urlconf_module
return import_module(self.urlconf_name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\importlib\__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "<frozen importlib._bootstrap>", line 1206, in _gcd_import
File "<frozen importlib._bootstrap>", line 1178, in _find_and_load
File "<frozen importlib._bootstrap>", line 1149, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 940, in exec_module
File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
File "C:\code\myproject\myproject\urls.py", line 10, in <module>
path('test/', TestView.as_view()),
If I interpret this correctly, the problem is that the exception handler tries to render the 500 page, which imports the urls which leads to the same error.
The exception handler seems to have problems when it causes exceptions itself :D
comment:6 by , 3 years ago
| Component: | Core (Other) → Error reporting |
|---|---|
| Triage Stage: | Unreviewed → Accepted |
If I interpret this correctly, the problem is that the exception handler tries to render the 500 page, which imports the urls which leads to the same error.
Tentatively accepted for future investigation. It seems that at least resolve_error_handler()/get_caller() should handle errors when checking the URLconf/resolving paths.
comment:7 by , 3 years ago
| Owner: | changed from to |
|---|---|
| Status: | new → assigned |
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Hi, thanks for the report, however, I don't think you've explained the issue in enough detail to confirm a bug in Django. It works fine with Django built-in
runserverand withdaphne'srunserver(see docs). The repeated frame (5-6 times) in a non-development web servers doesn't look like an issue in Django itself.TBH, I think it's an issue in web servers. For example, it works properly when I change
ImproperlyConfiguredclass to inherit fromBaseExceptioninstead ofException, but that should not be the case asBaseExceptionis not intended to be directly inherited from user-defined exceptions.IMO, you should try to report it in web server bug trackers or in Python itself (check for duplicated first).