Hi, I have read both the Kafka design document at http://kafka.apache.org/design.html and the paper. And I have two questions about lost and duplicate message.
"Without acknowledging the producer, there is no guarantee that every published message is actually received by the broker." Is this still true as of now? Is there a solution to this issue in release 0.8? "However, in the case when a consumer process crashes without a clean shutdown, the consumer process that takes over those partitions owned by the failed consumer may get some duplicate messages that are after the last offset successfully committed to zookeeper." Does this issue have to be fixed on the consumer side as well? Why not fixed in Kafka? Thanks. Regards, Libo Yu
