Comment 5 for bug 1840647

As shown here:

https://storage.gra1.cloud.ovh.net/v1/AUTH_dcaab5e32b234d56b626f72581e3644c/zuul_opendev_logs_d9c/680481/1/check/ec2-api-functional-neutron/d9c3627/logs/etc/keystone/keystone.conf.txt.gz

You are using 'backend = oslo_cache.dict' this is no way is representative of any configuration that should be run in production. The dict backend will have odd edge cases and potential problems such as mutability of the cached data. The data is housed in-memory within the process.

Use memcached.

This is not a bug. Marking as invalid.