According to the API docs (https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol) Offset Commit and Offset Response sports a string field metadata, but does not explain its usage. Can anyone explain what it is for? Is it used by Kafka or is it wholly consumer-specific? If Kafka does not use it, what is a plausible usecase for a consumer?
Regards Henning Røigaard-Petersen
