[Twisted-Python] spawnProcess help needed

Phil Christensen phil at bubblehouse.org
Wed Dec 10 11:45:24 EST 2008

On Dec 9, 2008, at 5:41 PM, Jean-Paul Calderone wrote:
> On Tue, 9 Dec 2008 15:43:00 -0500, Phil Christensen <phil at bubblehouse.org 
> > wrote:
>> Everything is basically working, except for the fact that the  
>> md5sum processes never go away. It does seem that processEnded is  
>> being  called, since that's what issues the callback on the  
>> deferred returned  by run(), but the process sticks around, as a  
>> non-zombie, non-defunct  process that still appears to be using  
>> small amounts of CPU time.
> processEnded shouldn't be called until the child has exited and been
> reaped.  This means that the md5sum process should not still exist in
> any form if processEnded is being called.  So either the processes  
> you're
> seeing aren't associated with the ProcessProtocol instances you  
> think, or
> there's a pretty serious bug in Twisted. :)

Well,  it looks like I was wrong, and the processes do go away,  
although they take awhile. This isn't that surprising, since I'm  
seeing 10-15 md5 processes happening in parallel, and they're  
checksumming relatively large (~150MB) WAV files.

It ended up being all because of a dumb mistake. Thanks for the help,  

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://twistedmatrix.com/pipermail/twisted-python/attachments/20081210/e406d174/attachment.htm 

More information about the Twisted-Python mailing list