[zuul@controller-0 ~]$ oc rsh nova-api-0
sh-5.1$ rpm -ql python3-nova-27.5.2-18.0.20251210234725.c1c6d67.el9osttrunk.noarch | grep wsgi_app.py
/usr/lib/python3.9/site-packages/nova/api/openstack/wsgi_app.py
# Confirm fix is present
sh-5.1$ view /usr/lib/python3.9/site-packages/nova/api/openstack/wsgi_app.py +133
sh-5.1$ crudini --get /etc/nova/nova.conf keystone_authtoken
sh-5.1$ view /etc/nova/nova.conf 
# memcache_use_advanced_pool defaults to True

# Restart nova-api
[zuul@controller-0 ~]$ oc delete pods nova-api-0 nova-api-1 nova-api-2
[zuul@controller-0 ~]$ oc get pods | grep nova
nova-api-0                                               0/2     Running     0             9s
nova-api-1                                               0/2     Running     0             8s
nova-api-2                                               0/2     Running     0             9s
nova-cell0-conductor-0                                   1/1     Running     0             16h
nova-cell0-db-purge-29471040-v4mmr                       0/1     Completed   0             16h
nova-cell1-conductor-0                                   1/1     Running     0             16h
nova-cell1-db-purge-29471040-5vm9z                       0/1     Completed   0             16h
nova-cell1-novncproxy-0                                  1/1     Running     0             17h
nova-edpm-deployment-openstack-edpm-td975                0/1     Completed   0             16h
nova-metadata-0                                          2/2     Running     0             17h
nova-metadata-1                                          2/2     Running     0             17h
nova-metadata-2                                          2/2     Running     0             17h
nova-scheduler-0                                         1/1     Running     0             17h
nova-scheduler-1                                         1/1     Running     0             17h
nova-scheduler-2                                         1/1     Running     0             17h

# Gather nova-api logs
[zuul@controller-0 ~]$ oc logs -l service=nova-api -c nova-api-log --tail=1000 > nova-api.1.logs

# Confrim keystone_authtoken section is present
[zuul@controller-0 ~]$ view nova-api.1.logs 
[zuul@controller-0 ~]$ grep keystone_authtoken.memcache_use_advanced_pool nova-api.1.logs
2026-01-13 16:59:38.786 11 DEBUG nova.api.openstack.wsgi_app [None req-31f28fd9-eb67-4e53-bce3-8cb98f16b54d - - - - - -] keystone_authtoken.memcache_use_advanced_pool = True log_opt_values /usr/lib/python3.9/site-packages/oslo_config/cfg.py:2609
2026-01-13 16:59:38.863 10 DEBUG nova.api.openstack.wsgi_app [None req-ee66eeac-9dd2-44c1-8a33-e8097e6e9ee9 - - - - - -] keystone_authtoken.memcache_use_advanced_pool = True log_opt_values /usr/lib/python3.9/site-packages/oslo_config/cfg.py:2609
2026-01-13 16:59:39.411 10 DEBUG nova.api.openstack.wsgi_app [None req-ec085094-85b8-4e5f-8889-27cc6c0297ba - - - - - -] keystone_authtoken.memcache_use_advanced_pool = True log_opt_values /usr/lib/python3.9/site-packages/oslo_config/cfg.py:2609
2026-01-13 16:59:39.568 11 DEBUG nova.api.openstack.wsgi_app [None req-22ecddba-bc66-40fe-be2f-68fdd1cfd930 - - - - - -] keystone_authtoken.memcache_use_advanced_pool = True log_opt_values /usr/lib/python3.9/site-packages/oslo_config/cfg.py:2609
2026-01-13 16:59:38.509 11 DEBUG nova.api.openstack.wsgi_app [None req-25501b93-59f5-4420-8868-33afdc2fe88e - - - - - -] keystone_authtoken.memcache_use_advanced_pool = True log_opt_values /usr/lib/python3.9/site-packages/oslo_config/cfg.py:2609
2026-01-13 16:59:38.522 10 DEBUG nova.api.openstack.wsgi_app [None req-d6128bca-fc00-482c-a20d-6f4f8d01e424 - - - - - -] keystone_authtoken.memcache_use_advanced_pool = True log_opt_values /usr/lib/python3.9/site-packages/oslo_config/cfg.py:2609