Quarkus+Infinispan user has raised an issue, asking for the configuration related to grouping. 

https://github.com/quarkusio/quarkus/issues/34677

However, this is an embedded use case only. The documentation might confuse users about it. Client/server mode does not need this feature.

https://infinispan.org/docs/stable/titles/configuring/configuring.html#grouping-api_clustered-caches