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Kafka, mail # user - are commitOffsets botched to zookeeper?

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are commitOffsets botched to zookeeper?
Rob Withers 2013-05-17, 01:54
We are calling commitOffsets after every message consumption.  It looks to be ~60% slower, with 29 partitions.  If a single KafkaStream thread is from a connector, and there are 29 partitions, then commitOffsets sends 29 offset updates, correct?  Are these offset updates batched in one send to zookeeper?