Mod_python error: "PythonHandler django.core.handlers.modpython"

Traceback (most recent call last):

  File "/usr/lib/python2.4/site-packages/mod_python/apache.py", line 299, in HandlerDispatch
    result = object(req)

  File "/home/code/django/core/handlers/modpython.py", line 190, in handler
    return ModPythonHandler()(req)

  File "/home/code/django/core/handlers/modpython.py", line 164, in __call__
    response = self.get_response(req.uri, request)

  File "/home/code/django/core/handlers/base.py", line 98, in get_response
    db.db.rollback()

  File "/home/code/django/core/db/backends/postgresql.py", line 94, in rollback
    return self.connection.rollback()

DatabaseError: {: 'no connection to the server\n'}