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Mysterious error: ImportError: No module named django.contrib.auth.models

I was getting the following error when I was trying to load my site:

2016-10-06 14:43:15,419 :Error running WSGI application
Traceback (most recent call last):
  File "/bin/user_wsgi_wrapper.py", line 154, in __call__
    app_iterator = self.app(environ, start_response)
  File "/bin/user_wsgi_wrapper.py", line 170, in import_error_application
    raise e
  File "/bin/user_wsgi_wrapper.py", line 154, in __call__
    app_iterator = self.app(environ, start_response)
  File "/bin/user_wsgi_wrapper.py", line 170, in import_error_application
    raise e
  File "/bin/user_wsgi_wrapper.py", line 154, in __call__
    app_iterator = self.app(environ, start_response)
  File "/bin/user_wsgi_wrapper.py", line 170, in import_error_application
    raise e
  File "/bin/user_wsgi_wrapper.py", line 154, in __call__
    app_iterator = self.app(environ, start_response)
  File "/bin/user_wsgi_wrapper.py", line 170, in import_error_application
    raise e
  File "/bin/user_wsgi_wrapper.py", line 154, in __call__
    app_iterator = self.app(environ, start_response)
  File "/bin/user_wsgi_wrapper.py", line 170, in import_error_application
    raise e
  File "/bin/user_wsgi_wrapper.py", line 154, in __call__
    app_iterator = self.app(environ, start_response)
  File "/bin/user_wsgi_wrapper.py", line 170, in import_error_application
    raise e
  File "/bin/user_wsgi_wrapper.py", line 154, in __call__
    app_iterator = self.app(environ, start_response)
  File "/bin/user_wsgi_wrapper.py", line 170, in import_error_application
    raise e
  File "/bin/user_wsgi_wrapper.py", line 154, in __call__
    app_iterator = self.app(environ, start_response)
  File "/bin/user_wsgi_wrapper.py", line 170, in import_error_application
    raise e
  File "/bin/user_wsgi_wrapper.py", line 154, in __call__
    app_iterator = self.app(environ, start_response)
  File "/bin/user_wsgi_wrapper.py", line 170, in import_error_application
    raise e
  File "/bin/user_wsgi_wrapper.py", line 154, in __call__
    app_iterator = self.app(environ, start_response)
  File "/bin/user_wsgi_wrapper.py", line 170, in import_error_application
    raise e
  File "/bin/user_wsgi_wrapper.py", line 179, in <module>
    application = load_wsgi_application()
  File "/bin/user_wsgi_wrapper.py", line 175, in load_wsgi_application
    return __import__(os.environ['WSGI_MODULE'], globals(), locals(), ['application']).application
  File "/var/www/karthikkn_pythonanywhere_com_wsgi.py", line 89, in <module>
    application = get_wsgi_application()
  File "/home/karthikkn/.virtualenvs/django17/lib/python3.4/site-packages/django/core/wsgi.py", line 13, in get_wsgi_application
    django.setup()
  File "/home/karthikkn/.virtualenvs/django17/lib/python3.4/site-packages/django/__init__.py", line 18, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/home/karthikkn/.virtualenvs/django17/lib/python3.4/site-packages/django/apps/registry.py", line 108, in populate
    app_config.import_models(all_models)
  File "/home/karthikkn/.virtualenvs/django17/lib/python3.4/site-packages/django/apps/config.py", line 202, in import_models
    self.models_module = import_module(models_module_name)
  File "/home/karthikkn/.virtualenvs/django17/lib/python3.4/importlib/__init__.py", line 109, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
ImportError: No module named 'django.contrib.auth.models'

Site was working properly the last time I checked (few days ago) and no change was made. But, when I just reloaded the site from the Web tab, it was working again..I did not change anything else.

Anyone has encountered similar behaviors? Can't figure out what's causing this..

deleted-user-1563559 | 10 posts | Oct. 6, 2016, 2:54 p.m. | permalink

That's really strange! So, just to make sure I understand -- it was working, you didn't change anything, then it suddenly started generating that error, and all you did was reload -- and it started working?

Staff giles | 11788 posts | PythonAnywhere staff | Oct. 6, 2016, 4:57 p.m. | permalink

Hmm, actually, there is something strange with the server your website is running on -- I think a hangover from some problems we had this morning. I've just rebooted it, so hopefully that will clear up the problem.

Staff giles | 11788 posts | PythonAnywhere staff | Oct. 6, 2016, 5:05 p.m. | permalink

That's really strange! So, just to make sure I understand -- it was working, you didn't change anything, then it suddenly started generating that error, and all you did was reload -- and it started working?

Yes, that's exactly what happend. Thanks for looking into it. :)

deleted-user-1563559 | 10 posts | Oct. 7, 2016, 3:49 p.m. | permalink

Thanks for confirming!

Staff giles | 11788 posts | PythonAnywhere staff | Oct. 7, 2016, 3:53 p.m. | permalink