Hi, most third party clients don't feature the zookeeper and consumer group logic of the official scala/java clients due to the complexity of it. There are plans to move much of the consumer group logic from the client side to the broker to alleviate this, making it easier for third party clients to be feature comparable to the official one, but I don't know the time frame of that.
If you need support for a certain API in one of the third party clients the best way is usually to submit a project bug report (usually github issue) and a use case. /Magnus
