Hey everyone. I made a KIP that provides a mechanism for migrating from ZookeeperConsumerConnector to KafkaConsumer as well as a mechanism for rolling back from KafkaConsumer to ZookeeperConsumerConnector: https://cwiki.apache.org/confluence/display/KAFKA/KIP-125%3A+ZookeeperConsumerConnector+to+KafkaConsumer+Migration+and+Rollback
Comments are welcome. - Onur