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Area

organizations

Describe the bug

If I add or remove a user from an organization I am getting the error below - note that this only occurs in a cluster where there is more than 1 server:

Caused by: java.lang.ClassCastException: class org.keycloak.models.cache.infinispan.events.CacheKeyInvalidatedEvent cannot be cast to class org.keycloak.models.cache.infinispan.events.UserCacheInvalidationEvent (org.keycloak.models.cache.infinispan.events.CacheKeyInvalidatedEvent and org.keycloak.models.cache.infinispan.events.UserCacheInvalidationEvent are in unnamed module of loader io.quarkus.bootstrap.runner.RunnerClassLoader @7e6cbb7a)

Version

26.0.0

Regression

• The issue is a regression

Expected behavior

I would expect to add and remove a user from an organization without errors occuring.

Actual behavior

When I add or remove a user from an organization an error occurs - although the user does actually seem to be added / removed, leading me to believe it has something to do with the caching rather than the actual mechanics of adding or removing the user.

How to Reproduce?

Run a 2 Keycloak server cluster. I am using kubernetes and the codecentric/keycloakx helm chart found here https://codecentric.github.io/helm-charts.

Create a realm and enable organizations.
Add an organization to the realm
Add a test user
Add the user to the organization

Anything else?

No response