Unable to start keycloak 17.0.0 cache with kubernetes stack

With
ENV KC_CACHE=ispn
ENV KC_CACHE_STACK=kubernetes
Starting keycloak-x docker image I get

ERROR: dns_query can not be null or empty.

On keycloak 16.1.1 it worked. Any hints?
Thank you.

JAVA_OPTS_APPEND=-Djgroups.dns.query=keycloak-headless
when using the helm chart from codecentric

solved the problem

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