Re: [Twisted-Python] How do twisted and multiprocessing.Process create zombies?

2011-07-05 Thread Sean Ochoa
I like glyph's answer.  :)

http://stackoverflow.com/questions/6589225/how-do-twisted-and-multiprocessing-process-create-zombies/6589440#6589440



On Tue, Jul 5, 2011 at 3:00 PM,  wrote:

> On 09:51 pm, sean.m.oc...@gmail.com wrote:
> >Using twisted loopingcall, multiprocessing.Process, and
> >multiprocessing.Queue; is it possible to create a zombie process. And,
> >if
> >so, then how?
>
> Uh, why would you want to create zombies?
>
> Since Twisted installs a SIGCHLD handler, it's not unlikely that non-
> cooperating libraries that create subprocesses, such as the
> multiprocessing module, will miss their exit notification, leaving a
> zombie.
>
> If you *don't* want zombies, use reactor.spawnProcess (or a library on
> top of it, like Ampoule) instead.
>
> Jean-Paul
>
> ___
> Twisted-Python mailing list
> Twisted-Python@twistedmatrix.com
> http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python
>



-- 
Sean | (206) 962-7954
___
Twisted-Python mailing list
Twisted-Python@twistedmatrix.com
http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python


Re: [Twisted-Python] How do twisted and multiprocessing.Process create zombies?

2011-07-05 Thread exarkun
On 09:51 pm, sean.m.oc...@gmail.com wrote:
>Using twisted loopingcall, multiprocessing.Process, and
>multiprocessing.Queue; is it possible to create a zombie process. And, 
>if
>so, then how?

Uh, why would you want to create zombies?

Since Twisted installs a SIGCHLD handler, it's not unlikely that non- 
cooperating libraries that create subprocesses, such as the 
multiprocessing module, will miss their exit notification, leaving a 
zombie.

If you *don't* want zombies, use reactor.spawnProcess (or a library on 
top of it, like Ampoule) instead.

Jean-Paul

___
Twisted-Python mailing list
Twisted-Python@twistedmatrix.com
http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python


[Twisted-Python] How do twisted and multiprocessing.Process create zombies?

2011-07-05 Thread Sean Ochoa
Using twisted loopingcall, multiprocessing.Process, and
multiprocessing.Queue; is it possible to create a zombie process. And, if
so, then how?

 -- bitcycle
___
Twisted-Python mailing list
Twisted-Python@twistedmatrix.com
http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python