django-extensions: Runserver_plus exceptions stacktrace is polluted

Hi there,

When an uncaught exception occurs in my apps using runserver_plus, the stacktrace is going through a significant amount of redundant code, and I can’t figure out why. 10 calls are made to six.reraise(exc_type, exc_value, tb). I think it should probably be improved for clarity.

Using Django 1.11 / Python 2.7 / Django Extensions last table (2.0.7).

127.0.0.1 - - [30/Apr/2018 14:55:01] "GET /crash/ HTTP/1.1" 500 -
Traceback (most recent call last):
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/contrib/staticfiles/handlers.py", line 63, in __call__
    return self.application(environ, start_response)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/wsgi.py", line 157, in __call__
    response = self.get_response(request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/base.py", line 124, in get_response
    response = self._middleware_chain(request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 43, in inner
    response = response_for_exception(request, exc)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 93, in response_for_exception
    response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 139, in handle_uncaught_exception
    return debug.technical_500_response(request, *exc_info)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django_extensions/management/technical_response.py", line 6, in null_technical_500_response
    six.reraise(exc_type, exc_value, tb)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 41, in inner
    response = get_response(request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/utils/deprecation.py", line 140, in __call__
    response = self.get_response(request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 43, in inner
    response = response_for_exception(request, exc)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 93, in response_for_exception
    response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 139, in handle_uncaught_exception
    return debug.technical_500_response(request, *exc_info)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django_extensions/management/technical_response.py", line 6, in null_technical_500_response
    six.reraise(exc_type, exc_value, tb)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 41, in inner
    response = get_response(request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/utils/deprecation.py", line 140, in __call__
    response = self.get_response(request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 43, in inner
    response = response_for_exception(request, exc)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 93, in response_for_exception
    response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 139, in handle_uncaught_exception
    return debug.technical_500_response(request, *exc_info)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django_extensions/management/technical_response.py", line 6, in null_technical_500_response
    six.reraise(exc_type, exc_value, tb)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 41, in inner
    response = get_response(request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/utils/deprecation.py", line 140, in __call__
    response = self.get_response(request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 43, in inner
    response = response_for_exception(request, exc)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 93, in response_for_exception
    response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 139, in handle_uncaught_exception
    return debug.technical_500_response(request, *exc_info)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django_extensions/management/technical_response.py", line 6, in null_technical_500_response
    six.reraise(exc_type, exc_value, tb)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 41, in inner
    response = get_response(request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/utils/deprecation.py", line 140, in __call__
    response = self.get_response(request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 43, in inner
    response = response_for_exception(request, exc)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 93, in response_for_exception
    response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 139, in handle_uncaught_exception
    return debug.technical_500_response(request, *exc_info)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django_extensions/management/technical_response.py", line 6, in null_technical_500_response
    six.reraise(exc_type, exc_value, tb)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 41, in inner
    response = get_response(request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/utils/deprecation.py", line 140, in __call__
    response = self.get_response(request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 43, in inner
    response = response_for_exception(request, exc)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 93, in response_for_exception
    response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 139, in handle_uncaught_exception
    return debug.technical_500_response(request, *exc_info)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django_extensions/management/technical_response.py", line 6, in null_technical_500_response
    six.reraise(exc_type, exc_value, tb)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 41, in inner
    response = get_response(request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/utils/deprecation.py", line 140, in __call__
    response = self.get_response(request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 43, in inner
    response = response_for_exception(request, exc)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 93, in response_for_exception
    response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 139, in handle_uncaught_exception
    return debug.technical_500_response(request, *exc_info)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django_extensions/management/technical_response.py", line 6, in null_technical_500_response
    six.reraise(exc_type, exc_value, tb)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 41, in inner
    response = get_response(request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/utils/deprecation.py", line 140, in __call__
    response = self.get_response(request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 43, in inner
    response = response_for_exception(request, exc)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 93, in response_for_exception
    response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 139, in handle_uncaught_exception
    return debug.technical_500_response(request, *exc_info)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django_extensions/management/technical_response.py", line 6, in null_technical_500_response
    six.reraise(exc_type, exc_value, tb)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 41, in inner
    response = get_response(request)
  File "/Users/antwan/Projects/myproject/apps/core/middleware.py", line 14, in __call__
    return self.get_response(request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 43, in inner
    response = response_for_exception(request, exc)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 93, in response_for_exception
    response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 139, in handle_uncaught_exception
    return debug.technical_500_response(request, *exc_info)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django_extensions/management/technical_response.py", line 6, in null_technical_500_response
    six.reraise(exc_type, exc_value, tb)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 41, in inner
    response = get_response(request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/utils/deprecation.py", line 140, in __call__
    response = self.get_response(request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 43, in inner
    response = response_for_exception(request, exc)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 93, in response_for_exception
    response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 139, in handle_uncaught_exception
    return debug.technical_500_response(request, *exc_info)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django_extensions/management/technical_response.py", line 6, in null_technical_500_response
    six.reraise(exc_type, exc_value, tb)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/exception.py", line 41, in inner
    response = get_response(request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/base.py", line 187, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/Users/antwan/Projects/myproject/venv/lib/python2.7/site-packages/django/core/handlers/base.py", line 185, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/Users/antwan/Projects/myproject/apps/core/views.py", line 506, in crash_view
    raise Exception('A test exception occured!')

About this issue

Original URL
State: closed
Created 6 years ago
Comments: 16 (7 by maintainers)

Most upvoted comments

I took another look today and changed my mind, null_technical_500_response will need to be modified to clean up the stacktrace. Django calls django_extensions’s null_technical_500_response for each Middleware Mixin object in a stack (because it is overridden in runserver_plus.py). By the time an uncaught exception occurs in the django app there are typically 8-10 of these Mixins in the stack, hence all the six reraise calls on top of the original exception.

I don’t think this is related to python 3’s exception chaining as mentioned here. I think null_technical_500_response needs to be modified to return django_extensions’s version of a response to be displayed, instead of raising an exception. Not sure how to do this yet, but should be able to figure it out next time I can look in a few days.

jhselvik on Jul 26, 2018

@antwan @trbs Would you be open to me creating a bounty for this issue on Gitcoin ?

mbeacom on Jul 23, 2018

yay! paying out now @jhselvik

owocki on Aug 13, 2018

/a wild gitcoin funder appears

since this is a problem i currently have, and i have no idea how to solve nor do i have the time to really look into it. im going to put a small $75 bounty on it. to whomever figures out the issue, let me know if it’s more complex than a $75 bounty would cover ( i just dont know the complexity from the outside)

owocki on Jul 24, 2018

No problem. If that works out we might be able to do it for other issues as well 😃

trbs on Jul 23, 2018