After using django 1.3 for a while I upgraded to django 1.4 and started noticing apache threads hanging indefinitely. I set a timeout to avoid running out of threads, but it would be nice to know what is causing the issue in the first place.
Using an strace, I found that the threads are attempting to read from a socket and are not doing anything after that. The apache logs were not helpful, but we did find the following stacktrace in our mod_wsgi process: [Wed Aug 22 15:20:49 2012] [error] # ProcessId: 17018 [Wed Aug 22 15:20:49 2012] [error] # ThreadID: 1135962432 [Wed Aug 22 15:20:49 2012] [error] File: "/opt/py26/lib/python2.6/site-packages/django/core/handlers/wsgi.py", line 241, in __call__ [Wed Aug 22 15:20:49 2012] [error] response = self.get_response(request) [Wed Aug 22 15:20:49 2012] [error] File: "/opt/py26/lib/python2.6/site-packages/django/core/handlers/base.py", line 111, in get_response [Wed Aug 22 15:20:49 2012] [error] response = callback(request, *callback_args, **callback_kwargs) [Wed Aug 22 15:20:49 2012] [error] File: "/opt/py26/lib/python2.6/site-packages/django/contrib/auth/decorators.py", line 20, in _wrapped_view [Wed Aug 22 15:20:49 2012] [error] return view_func(request, *args, **kwargs) [Wed Aug 22 15:20:49 2012] [error] File: "/opt/py26/lib/python2.6/site-packages/axiom_openid_auth/user_whitelist/decorators.py", line 25, in decorated [Wed Aug 22 15:20:49 2012] [error] return func(request, *args, **kwargs) [Wed Aug 22 15:20:49 2012] [error] File: "/opt/py26/lib/python2.6/site-packages/axiom_django/dispatcher.py", line 91, in __call__ [Wed Aug 22 15:20:49 2012] [error] return (handler(request, *args, **kwargs) if handler else [Wed Aug 22 15:20:49 2012] [error] File: "/opt/py26/lib/python2.6/site-packages/django/contrib/auth/decorators.py", line 20, in _wrapped_view [Wed Aug 22 15:20:49 2012] [error] return view_func(request, *args, **kwargs) [Wed Aug 22 15:20:49 2012] [error] File: "/opt/py26/lib/python2.6/site-packages/axiom_openid_auth/user_whitelist/decorators.py", line 25, in decorated [Wed Aug 22 15:20:49 2012] [error] return func(request, *args, **kwargs) [Wed Aug 22 15:20:49 2012] [error] File: "/opt/py26/lib/python2.6/site-packages/axiom_user_authorization/decorators.py", line 34, in decorated [Wed Aug 22 15:20:49 2012] [error] return func(request, *args, **kwargs) [Wed Aug 22 15:20:49 2012] [error] File: "/opt/py26/lib/python2.6/site-packages/axiom_django/templates_decorators.py", line 61, in wrapped [Wed Aug 22 15:20:49 2012] [error] return func(request, *args, **kwargs) [Wed Aug 22 15:20:49 2012] [error] File: "/opt/py26/lib/python2.6/site-packages/axiom_django/multiresponse.py", line 83, in wrapper [Wed Aug 22 15:20:49 2012] [error] context_instance, headers) [Wed Aug 22 15:20:49 2012] [error] File: "/opt/py26/lib/python2.6/site-packages/axiom_django/multiresponse.py", line 112, in __get_response [Wed Aug 22 15:20:49 2012] [error] context_instance = context_instance) [Wed Aug 22 15:20:49 2012] [error] File: "/opt/py26/lib/python2.6/site-packages/django/shortcuts/__init__.py", line 20, in render_to_response [Wed Aug 22 15:20:49 2012] [error] return HttpResponse(loader.render_to_string(*args, **kwargs), **httpresponse_kwargs) [Wed Aug 22 15:20:49 2012] [error] File: "/opt/py26/lib/python2.6/site-packages/django/template/loader.py", line 169, in render_to_string [Wed Aug 22 15:20:49 2012] [error] t = get_template(template_name) [Wed Aug 22 15:20:49 2012] [error] File: "/opt/py26/lib/python2.6/site-packages/django/template/loader.py", line 145, in get_template [Wed Aug 22 15:20:49 2012] [error] template, origin = find_template(template_name) [Wed Aug 22 15:20:49 2012] [error] File: "/opt/py26/lib/python2.6/site-packages/django/template/loader.py", line 134, in find_template [Wed Aug 22 15:20:49 2012] [error] source, display_name = loader(name, dirs) [Wed Aug 22 15:20:49 2012] [error] File: "/opt/py26/lib/python2.6/site-packages/django/template/loader.py", line 42, in __call__ [Wed Aug 22 15:20:49 2012] [error] return self.load_template(template_name, template_dirs) [Wed Aug 22 15:20:49 2012] [error] File: "/opt/py26/lib/python2.6/site-packages/django/dispatch/saferef.py", line 121, in remove [Wed Aug 22 15:20:49 2012] [error] function( self ) [Wed Aug 22 15:20:49 2012] [error] File: "/opt/py26/lib/python2.6/site-packages/django/dispatch/dispatcher.py", line 250, in _remove_receiver [Wed Aug 22 15:20:49 2012] [error] for idx, (r_key, _) in enumerate(reversed(self.receivers)): [Wed Aug 22 15:20:49 2012] [error] File: "/opt/py26/lib/python2.6/site-packages/django/dispatch/saferef.py", line 121, in remove [Wed Aug 22 15:20:49 2012] [error] function( self ) [Wed Aug 22 15:20:49 2012] [error] File: "/opt/py26/lib/python2.6/site-packages/django/dispatch/dispatcher.py", line 240, in _remove_receiver [Wed Aug 22 15:20:49 2012] [error] self.lock.acquire() Has anyone come across anything similar or have any advice on how to debug further? -- You received this message because you are subscribed to the Google Groups "Django users" group. 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