Reza Lotun wrote:

Hi Gabriel,

Hello Reza,

There's two problems from what I can see.

1) You have a method run in a thread

def __myLoop(self): while True: self.transport.write("Thread") time.sleep(1)

but since it's being run in a thread, you need to schedule the call into the reactor like so:

def __myLoop(self): while True: reactor.callFromThread(self.transport.write, "Thread") time.sleep(1)

Yes, I forgot to do that in the example, silly me, I do do that in my real code though.

2) Your loop in that thread will run forever no matter what. It isn't a daemon thread so there needs to be some sort of stopping criterion (there's no way to kill Python threads externally):

def __myLoop(self): while self.factory.running: reactor.callFromThread(self.transport.write, "Thread") time.sleep(1)

By setting an attribute on the factory in the __init__ called 'running' to True, then in the signal handler code we can set it to False, providing a quick and dirty way to bail out of that thread.

Ahh, ok, I though Twisted would stop them somehow, That must be it then one of my threads must not exit and thus runs forever and Twisted waits on it.

I made the modifications and sending a cntrl-C made the program exit just fine.

Cheers, Reza

Thank you! Gabriel

On Fri, Feb 13, 2009 at 8:37 AM, Gabriel Rossetti <gabriel.rossetti@arimaz.com> wrote:

...

Hello everyone,

I was able to write a small example that reproduces my problem, when I redefine signal and I have threads and I try to stop the reactor, it hangs. I wasn't sure if it was loopingCall or callLater or threads at first, but from my tests it's the threads that cause the problem. I attached the example, it's a modified version of the Twisted echo server/client example. Run the server, run the client, press Ctrl + C in the client's terminal (or Ctrl + break on windows) and it doesn't quit. I still have to test if it's caused by the signal redefinition at all or not.

Thank you, Gabriel Rossetti

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