Handle an error gracefully.

def handle_error(self, request, client_address):
        """Handle an error gracefully.
        """
        if self.can_ignore_error():
            return
        thread = threading.current_thread()
        msg("Error in request ({0}): {1} in {2}\n{3}",
            client_address, repr(request), thread.name, traceback.format_exc())