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The Kafka 3.6.0 release is bringing ZooKeeper 3.8.2.
It seems that this ZooKeeper version doesn't have the fix we provided for the DNS issue we were facing on ZooKeeper 3.6.x (in Kafka 3.5.0). The PR provided by lukchen@redhat.com was merged on master but not backported to 3.8 branch so it's not in the latest Kafka 3.6.0. The ZooKeeper maintainers were keen to backport but it didn't happen (yet). With Kafka 3.6.0 release coming, it's too late to have the fix upstream.
More details about the PR here: https://github.com/apache/zookeeper/pull/2040
We should backport the fix downstream in our own build of ZooKeeper 3.8.2 in order to support it.