python-daemon interaction with multiprocessing (secure-smtpd)

[Grant Edwards]

With Python 2.7.5, I'm trying to use the python-daemon 1.6 and its
DaemonRunner helper with the seucre-smtpd 1.1.9 which appears to use
multiprocessing and a process pool under the covers.  There seem to be
a couple process issues:

 1) The pid file created by DaemonRunner dissappears.  This seems to
    happen when the SMTP client closes the connection without saying
    goodbye first.  The process who's PID was in the pid file before
    it vanished is still running (as is the pool of worker processes),
    and they are still accepting connections and working as it should.

    Has anybody else had any luck with DaemonRunner and pidfiles?
    
 2) When DaemonRunner kills the "lead" process (the parent of the
    worker pool), the worker pools stays alive and continues to handle
    accept and handle requests.  [I've tried kill -TERM and -QUIT on
    the lead process by hand with the TERM signal, and got the same
    results: the worker pool continues to run.]

    How so you terminate a Python program that's using multiprocessing?

-- 
Grant Edwards               grant.b.edwards        Yow! Look!  A ladder!
                                  at               Maybe it leads to heaven,
                              gmail.com            or a sandwich!