Previously, some binary Python modules used by Horizon were compiled with a flag that requires them to use the simplified GIL state API. Since mod_wsgi uses sub-interpreters and the simplified GIL state API is not reentrant, it results in the mod_wsgi locking up. Consequently the dashboard is unavailable.
With this update, the mod_wsgi configuration was changed, forcing mod_wsgi to use the main interpreter instead of sub-interpreters. As a result, mod_wsgi works correctly.
Comment 1Radomir Dopieralski
2017-09-22 23:19:16 UTC
Installed OSP8 with openstack-puppet-modules-7.1.5-7.el7ost from brew. Verified that it works and that the /etc/httpd/conf.d/15-horizon_vhost.conf file contains the line WSGIApplicationGroup %{GLOBAL}.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2017:3286
Installed OSP8 with openstack-puppet-modules-7.1.5-7.el7ost from brew. Verified that it works and that the /etc/httpd/conf.d/15-horizon_vhost.conf file contains the line WSGIApplicationGroup %{GLOBAL}.