Restart script for Django fails with "uknown process" error

This is just a side effect of the way our apache app "stop" script works.

The script looks like this:

#!/bin/env python

import os

stopped = False

# Stop Apache if it is running.
for line in os.popen('ps -o pid,command -u testweb343'):
    if '/home/username/webapps/appname/apache2/conf/httpd.conf' in line:
        stopped = True
        os.system('kill %s' % line.split()[0])

if not stopped:
    print "Apache is not running."

It basically looks for processes that contain "/home/username/webapps/app/apache2/conf/httpd.conf" and kills them as it finds them. If it kills your WSGI parent process first, then the children will sometimes die before the script kills them, which results in the "No such process" error message.

This is, admittedly, not a great technique, but the error message is harmless. If it's causing problems for you, then you could replace your ~/webapps/app/apache2/bin/stop script with something like this:

#!/bin/bash

APP_PATH=/home/username/webapps/app

$APP_PATH/apache2/bin/httpd.worker -f $APP_PATH/apache2/conf/httpd.conf -k stop

Hope that helps!