Hi! My client is supposed to wait for two seconds to receive data when a shutdown event is triggered. In buildProtocol() the trigger is added: self.sdt= reactor.addSystemEventTrigger('before', 'shutdown', protocol.shutdown) The method shutdown() is supposed to wait for 2 seconds before closing the connection: def shutdown(self): self.doSomeCleanup() # works self.sendSomeData() # works d= defer.Deferred() reactor.callLater(2.0, d.callback, None) return d The shutdown() method gets called, cleanup and sending of data work as expected. But the connection is closed by my client _before_ the two seconds are over. Isn't the shutdown process supposed to be halted until the deferred returned by shutdown() is fired? Thank you! -- Bye, Andreas