Corrupted Realm in KC 21?

Hi,

I have a clustered Keycloak 21 deployment (JDBC_PING) with 10 realms. Today, one of the realms stopped working. I wasn’t able to authenticate via my app or view the sessions in the KC admin console UI. While this was going on, all the other realms were performing well. I manually re-created the problem realm and was able to operate successfully.

All the realms use a custom JDBC User Federation SPI and each have up to 3 clients.

I’m figuring data corruption, but I’m not familiar with the tables. Does anyone know of a table that I might need to clean up if I see the problem again?

Thanks,
Carl