Mod_python error: "PythonHandler trac.web.modpython_frontend"

Traceback (most recent call last):

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

  File "/usr/lib/python2.4/site-packages/trac/web/modpython_frontend.py", line 149, in handler
    gateway.run(dispatch_request)

  File "/usr/lib/python2.4/site-packages/trac/web/wsgi.py", line 89, in run
    response = application(self.environ, self._start_response)

  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 481, in dispatch_request
    return _dispatch_request(req, env, env_error)

  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 557, in _dispatch_request
    send_internal_error(env, req, sys.exc_info())

  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 565, in send_internal_error
    exception_to_unicode(exc_info[1], traceback=True))

  File "/usr/lib/python2.4/logging/__init__.py", line 999, in error
    apply(self._log, (ERROR, msg, args), kwargs)

  File "/usr/lib/python2.4/logging/__init__.py", line 1079, in _log
    self.handle(record)

  File "/usr/lib/python2.4/logging/__init__.py", line 1089, in handle
    self.callHandlers(record)

  File "/usr/lib/python2.4/logging/__init__.py", line 1126, in callHandlers
    hdlr.handle(record)

  File "/usr/lib/python2.4/logging/__init__.py", line 642, in handle
    self.emit(record)

  File "/usr/lib/python2.4/logging/__init__.py", line 744, in emit
    self.handleError(record)

  File "/usr/lib/python2.4/logging/__init__.py", line 693, in handleError
    traceback.print_exception(ei[0], ei[1], ei[2], None, sys.stderr)

  File "/usr/lib/python2.4/traceback.py", line 124, in print_exception
    _print(file, 'Traceback (most recent call last):')

  File "/usr/lib/python2.4/traceback.py", line 13, in _print
    file.write(str+terminator)

IOError: [Errno 28] No space left on device