cherrypy not closing the sockets

[21/Oct/2008:12:44:25] ENGINE HTTP Server
cherrypy._cpwsgi_server.CPWSGIServer(('0.0.0.0', 8080)) shut down
[21/Oct/2008:12:44:25] ENGINE Stopped thread '_TimeoutMonitor'.
[21/Oct/2008:12:44:25] ENGINE Stopped thread 'Autoreloader'.
[21/Oct/2008:12:44:25] ENGINE Bus STOPPED
[21/Oct/2008:12:44:25] ENGINE Bus EXITING
[21/Oct/2008:12:44:25] ENGINE Bus EXITED
Exception in thread HTTPServer Thread-3:
Traceback (most recent call last):
  File "/usr/lib/python2.3/threading.py", line 436, in __bootstrap
    self.run()
  File "/usr/lib/python2.3/threading.py", line 416, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib/python2.3/site-packages/cherrypy/process/servers.py", line 73, in
_start_http_thread
    self.httpserver.start()
  File "/usr/lib/python2.3/site-packages/cherrypy/wsgiserver/__init__.py", line 1388, in start
    self.tick()
  File "/usr/lib/python2.3/site-packages/cherrypy/wsgiserver/__init__.py", line 1417, in tick
    s, addr = self.socket.accept()
  File "/usr/lib/python2.3/socket.py", line 167, in accept
    sock, addr = self._sock.accept()
error: (24, 'Too many open files')
[21/Oct/2008:12:44:25] ENGINE Waiting for child threads to terminate..

netstat -ap | grep "4536" | grep CLOSE_WAIT | wc -l

cherrypy.config.update({'server.socketQueueSize': '10'})