[Twisted-Python] Question about processes in python
David Ripton
dripton at ripton.net
Mon Apr 12 10:06:37 MDT 2010
On 2010.04.12 09:39:21 -0600, Jason J. W. Williams wrote:
> Haven't had any issues yet. Twisted imports occur inside the process
> function. The app was originally written as a purely blocking
> multiprocessing app and rewritten to use Twisted inside the
> sub-processes. It's passed all automated and hand tests without an
> issue. Is there a reason importing Twisted inside sub-process should
> not work?
Here's JP's canonical answer:
http://stackoverflow.com/questions/1948641/twisted-threading-with-subprocess-popen
I've seen this problem in real code. We had a PyGTK + Twisted program
that erroneously used subprocess in one place. 2% of the time, it
caused an exception. 98% of the time, it worked fine. Classic race
condition. Could be you have a similar bug but it never actually
manifests on your combination of code, OS, and hardware. Hard to say.
--
David Ripton dripton at ripton.net
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