G1GC OOM

[ahus1]

Community is reporting that with G1GC there is no out-of-memory exception / JVM shutdown when the Keycloak heap increases - test originally with Keycloak 24
The scenario was that a lot of session were used here. For KC26, maybe creating a lot of authentication sessions can be used, or setting the heap size to a very small value.

Originally reported by @sschu