[Twisted-web] server crashes

[stephan]

I am almost done with my web app. Now just before finalizing the project I 
noticed that when I request two pages at the same time (e.g. double 
clicking on a link) my app including twisted just exits.

I am almost certain that this behavior has something to do with the fact 
that I put every request in a seperate thread. My render methode looks 
pretty much like this:

def render(self, request):
     threads.deferToThread(handleRequest, request).addCallback(\
         writeRequestAndFinish, request).addErrback(\
         request.processingFailed)
     return server.NOT_DONE_YET


Any idea why this does not work? Do you think there is a problem with 
accessing the request variable from a different thread?

_stephan