java.nio.channels.UnresolvedAddressException when trying to create a topic in Amazon MSK

Hi there, even though full support of Java 17 is included in later versions of Kafka https://issues.apache.org/jira/browse/KAFKA-13273, I did not see any issues with some simple data plane commands like creating or deleting topics from Apache Kafka 2.7.0 client. It could also be a transient network issue while connecting to zookeeper. Instead of zookeeper string, can you try using --bootstrap-server <broker string> and see if that works.

./kafka-topics.sh --bootstrap-server <broker endpoints> --list