Consuming Batches :: Spring Cloud Stream

Starting with version 3.0, when spring.cloud.stream.bindings.<name>.consumer.batch-mode is set to true, all of the records received by polling the Kafka Consumer will be presented as a List<?> to the listener method.
Otherwise, the method will be called with one record at a time.
The size of the batch is controlled by Kafka consumer properties max.poll.records, fetch.min.bytes, fetch.max.wait.ms; refer to the Kafka documentation for more information.

Starting with version 4.0.2, the binder supports DLQ capabilities when consuming in batch mode.
Keep in mind that, when using DLQ on a consumer binding that is in batch mode, all the records received from the previous poll will be delivered to the DLQ topic.