Comment 7 for bug 1482271

Tom, it's usually tricky to catch a race condition, and if you want to try it for this issue, please do the following:
- Install keystone in multithreaded mode using Apache mod_wsgi
- Repeat the following:
-- Restart Apache
-- Perform some operation involving token storage or caching in several processes in parallel
Occasionally you'll receive an error containing a message that cache region is already configured.
Good luck!