Infinispan errors upgrading from keycloak 11.x to 12.x

[dasniko]

11.0.3 to 12.0.1 Upgrade fails

Keycloak doesn’t support rolling upgrades. So, if you want to wait, until this is fixed, this might become long… very long… Zero-downtime upgrade is on the map for Keycloak.X. But then, you only will be upgradeable from an X-based version to one of the next without downtime, not from 11.x to somewhat X…