Hi there! I'm investigating what it means to implement consumer group protocol for 0.8. However all the documents I can find on line is for 0.9 e.g. https://cwiki.apache.org/confluence/display/KAFKA/Kafka+0.9+Consumer+Rewrite+Design
Also, in kafka code base, JOIN_GROUP_REQUEST_V0 schema in 0.8 is different from 0.9. Why is the protocol upgraded without bumping the JoinGroupRequest API version number? Anyone have some tips on where to start? Regards -Zaiming
