Comment 12 for bug 1472675

There is steps how to reproduce it:

launch apache start/stop in cycle
while :; do service apache2 stop; service apache2 start; done

after sime time apache failed to start, because it can't bind to opened socket:
 * Starting web server apache2
 *
 * Stopping web server apache2
 *
 * Starting web server apache2
 *
 * Stopping web server apache2
 *
 * Starting web server apache2
(98)Address already in use: AH00072: make_sock: could not bind to address [::]:35357
(98)Address already in use: AH00072: make_sock: could not bind to address 0.0.0.0:35357
no listening sockets available, shutting down
AH00015: Unable to open logs
Action 'start' failed.
The Apache error log may have more information.
 *
 * The apache2 instance did not start within 20 seconds. Please read the log files to discover problems
 * Stopping web server apache2
 *
 * Starting web server apache2
 *
 * Stopping web server apache2

I've tried to remove keystone from apache, and try it with horizon and radosg wsgi apps.
I didn't reproduce error in 12 hours. While with keystone it is possible to reproduce in 5-10 minutes.

@keystone: please check it from python side