Public bug reported: When configured as an Apache WSGI module a race condition is possible during keystone cache initialization: https://github.com/openstack/keystone/blob/master/keystone/common/kvs/core.py#L240 The operation raises exception region.RegionAlreadyConfigured. This is a result of the race condition involving global 'application' variable being initialized several times (1 per thread). application is required to be global according to Paste Deploy documentation: http://pythonpaste.org/deploy/ Apache modwsgi documentation suggests protecting global objects with thread locks: http://code.google.com/p/modwsgi/wiki/ProcessesAndThreading#Building_A_Portable_Application
** Affects: keystone Importance: Undecided Assignee: Alexander Makarov (amakarov) Status: In Progress -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to Keystone. https://bugs.launchpad.net/bugs/1482271 Title: Race condition in multithreaded Apache/WSGI setup Status in Keystone: In Progress Bug description: When configured as an Apache WSGI module a race condition is possible during keystone cache initialization: https://github.com/openstack/keystone/blob/master/keystone/common/kvs/core.py#L240 The operation raises exception region.RegionAlreadyConfigured. This is a result of the race condition involving global 'application' variable being initialized several times (1 per thread). application is required to be global according to Paste Deploy documentation: http://pythonpaste.org/deploy/ Apache modwsgi documentation suggests protecting global objects with thread locks: http://code.google.com/p/modwsgi/wiki/ProcessesAndThreading#Building_A_Portable_Application To manage notifications about this bug go to: https://bugs.launchpad.net/keystone/+bug/1482271/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : yahoo-eng-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp