Manually Committing Offsets

Normally, when using AckMode.MANUAL or AckMode.MANUAL_IMMEDIATE, the acknowledgments must be acknowledged in order, because Kafka does not maintain state for each record, only a committed offset for each group/partition. Starting with version 2.8, you can now set the container property asyncAcks, which allows the acknowledgments for records returned by the poll to be acknowledged in any order. The listener container will defer the out-of-order commits until the missing acknowledgments are received. The consumer will be paused (no new records delivered) until all the offsets for the previous poll have been committed.