More mod_wsgi weirdness: process restarts on redirect

[Ron Garret]

In article <mailman.8321.1233272610.3487.python-list at python.org>,
 Joshua Kugler <joshua at joshuakugler.com> wrote:

> Ron Garret wrote:
> > My question is: is this supposed to be happening?  Or is this an
> > indication that something is wrong, and if so, what?
> 
> You are probably just hitting a different instance of Apache, thus the
> different process ID.

Yep, that's what it turned out to be.  I thought I had a 
WSGIDaemonProcess processes=1 directive in my config, but I had it in 
the wrong place (a different vhost) so it wasn't actually active.

But that leaves me wondering why the redirect would reliably trigger 
switching processes.  The reason I thought that I had the correct 
configuration and only had one process is that when I reloaded the 
non-redirected page I *always* got the same process ID.  How does 
mod_wsgi decide which process  (and which thread for that matter) to use?

rg