I just wanted to send this out as an FYI but it does not affect any released versions.
This only affects those who release off trunk and use Kafka-based consumer offset management. KAFKA-1469 fixes an issue in our Utils.abs code. Since we use this method in determining the offset manager for a consumer group, the fix can yield a different offset manager if you happen to run off trunk and upgrade across the fix. This won't affect all groups, but those that happen to hash to a value that is affected by the bug fixed in KAFKA-1469. (Sort of related - we may want to consider not using hashcode on the group and switch to a more standard hashing algorithm but I highly doubt that hashcode values on a string will change in the future.) Thanks, -- Joel