title: Django + FastCGI - randomly raising OperationalError
body: <p>I'm running a Django application. Had it under Apache + mod_python before, and it was all OK. Switched to Lighttpd + FastCGI. Now I randomly get the following exception (neither the place nor the time where it appears seem to be predictable). Since it's random, and it appears only after switching to FastCGI, I assume it has something to do with some settings.</p>
  
  <p>Found a few results when googleing, but they seem to be related to setting maxrequests=1. However, I use the default, which is 0.</p>
  
  <p>Any ideas where to look for?</p>
  
  <p>PS. I'm using PostgreSQL. Might be related to that as well, since the exception appears when making a database query.</p>
  
  <pre><code> File "/usr/lib/python2.6/site-packages/django/core/handlers/base.py", line 86, in get_response
     response = callback(request, *callback_args, **callback_kwargs)
  
   File "/usr/lib/python2.6/site-packages/django/contrib/admin/sites.py", line 140, in root
     if not self.has_permission(request):
  
   File "/usr/lib/python2.6/site-packages/django/contrib/admin/sites.py", line 99, in has_permission
     return request.user.is_authenticated() and request.user.is_staff
  
   File "/usr/lib/python2.6/site-packages/django/contrib/auth/middleware.py", line 5, in __get__
     request._cached_user = get_user(request)
  
   File "/usr/lib/python2.6/site-packages/django/contrib/auth/__init__.py", line 83, in get_user
     user_id = request.session[SESSION_KEY]
  
   File "/usr/lib/python2.6/site-packages/django/contrib/sessions/backends/base.py", line 46, in __getitem__
     return self._session[key]
  
   File "/usr/lib/python2.6/site-packages/django/contrib/sessions/backends/base.py", line 172, in _get_session
     self._session_cache = self.load()
  
   File "/usr/lib/python2.6/site-packages/django/contrib/sessions/backends/db.py", line 16, in load
     expire_date__gt=datetime.datetime.now()
  
   File "/usr/lib/python2.6/site-packages/django/db/models/manager.py", line 93, in get
     return self.get_query_set().get(*args, **kwargs)
  
   File "/usr/lib/python2.6/site-packages/django/db/models/query.py", line 304, in get
     num = len(clone)
  
   File "/usr/lib/python2.6/site-packages/django/db/models/query.py", line 160, in __len__
     self._result_cache = list(self.iterator())
  
   File "/usr/lib/python2.6/site-packages/django/db/models/query.py", line 275, in iterator
     for row in self.query.results_iter():
  
   File "/usr/lib/python2.6/site-packages/django/db/models/sql/query.py", line 206, in results_iter
     for rows in self.execute_sql(MULTI):
  
   File "/usr/lib/python2.6/site-packages/django/db/models/sql/query.py", line 1734, in execute_sql
     cursor.execute(sql, params)
  
  OperationalError: server closed the connection unexpectedly
         This probably means the server terminated abnormally
         before or while processing the request.
  </code></pre>