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Django app throws spurious exception when importing views from third-party app -

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i'm working on django app throws viewdoesnotexist exception when trying import modules third-party app (solango, specific). "occasionally", mean enough annoying, minority of requests. solango on app's pythonpath , can imported reliably through console. error never happens during local development, maybe has server setup (the app uses apache + mod_wsgi in daemon mode).

here's stack trace showing error occurring in admin (although occurs on pretty every page on site):

traceback: file "/home/nybooks/ve/lib/python2.5/site-packages/django/core/handlers/base.py" in get_response   92.                 response = callback(request, *callback_args, **callback_kwargs) file "/home/nybooks/ve/lib/python2.5/site-packages/django/contrib/admin/sites.py" in root   445.             return self.index(request) file "/home/nybooks/ve/lib/python2.5/site-packages/django/views/decorators/cache.py" in _wrapped_view_func   44.         response = view_func(request, *args, **kwargs) file "/home/nybooks/ve/lib/python2.5/site-packages/django/contrib/admin/sites.py" in index   342.             context_instance=template.requestcontext(request) file "/home/nybooks/ve/lib/python2.5/site-packages/django/shortcuts/__init__.py" in render_to_response   20.     return httpresponse(loader.render_to_string(*args, **kwargs), **httpresponse_kwargs) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/loader.py" in render_to_string   108.     return t.render(context_instance) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/__init__.py" in render   178.         return self.nodelist.render(context) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/__init__.py" in render   778.                 bits.append(self.render_node(node, context)) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/__init__.py" in render_node   791.         return node.render(context) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/loader_tags.py" in render   97.         return compiled_parent.render(context) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/__init__.py" in render   178.         return self.nodelist.render(context) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/__init__.py" in render   778.                 bits.append(self.render_node(node, context)) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/__init__.py" in render_node   791.         return node.render(context) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/loader_tags.py" in render   97.         return compiled_parent.render(context) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/__init__.py" in render   178.         return self.nodelist.render(context) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/__init__.py" in render   778.                 bits.append(self.render_node(node, context)) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/__init__.py" in render_node   791.         return node.render(context) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/defaulttags.py" in render   245.                     return self.nodelist_true.render(context) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/__init__.py" in render   778.                 bits.append(self.render_node(node, context)) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/__init__.py" in render_node   791.         return node.render(context) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/defaulttags.py" in render   255.             return self.nodelist_true.render(context) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/__init__.py" in render   778.                 bits.append(self.render_node(node, context)) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/__init__.py" in render_node   791.         return node.render(context) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/loader_tags.py" in render   24.         result = self.nodelist.render(context) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/__init__.py" in render   778.                 bits.append(self.render_node(node, context)) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/__init__.py" in render_node   791.         return node.render(context) file "/home/nybooks/ve/lib/python2.5/site-packages/django/template/defaulttags.py" in render   372.             url = reverse(self.view_name, args=args, kwargs=kwargs) file "/home/nybooks/ve/lib/python2.5/site-packages/django/core/urlresolvers.py" in reverse   265.             *args, **kwargs))) file "/home/nybooks/ve/lib/python2.5/site-packages/django/core/urlresolvers.py" in reverse   238.         possibilities = self.reverse_dict.getlist(lookup_view) file "/home/nybooks/ve/lib/python2.5/site-packages/django/core/urlresolvers.py" in _get_reverse_dict   165.                     name in pattern.reverse_dict: file "/home/nybooks/ve/lib/python2.5/site-packages/django/core/urlresolvers.py" in _get_reverse_dict   173.                     lookups.appendlist(pattern.callback, (bits, p_pattern)) file "/home/nybooks/ve/lib/python2.5/site-packages/django/core/urlresolvers.py" in _get_callback   134.             raise viewdoesnotexist, "could not import %s. error was: %s" % (mod_name, str(e))  exception type: viewdoesnotexist @ /admin/ exception value: not import solango.views. error was: cannot import name settings

any ideas on what's causing problem, or @ least how can go debugging it?

your web server out of file descriptors. reconfigure mod_wsgi daemon mode.


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