kafka-console-consumer - Datacadamia - Data and Co To commit offsets asynchronously we can use following method of KafkaConsumer: public void commitAsync() This method commits offsets returned on the last poll (Duration) for all the subscribed list of topics and partition. Unless you're manually triggering commits, you're most likely using the Kafka consumer auto commit mechanism. Chapter 4. Kafka Consumers: Reading Data from Kafka A basic consumer configuration must have a host:port bootstrap server address for connecting to a Kafka broker. Bonus points for a code sample. You also need to define a group.id that identifies which consumer group this consumer belongs. Auto commit is enabled out of the box and by default commits every five seconds. Both commitSync and commitAsync uses kafka offset management feature and both has demerits. . Auto Offset Commit¶. After that we have another consumer process another batch and successfully committed offset 20. Kafka Tutorial: Creating a Kafka Consumer in Java - Cloudurable Construct a Kafka Consumer Just like we did with the producer, you need to specify bootstrap servers. As of Kafka 0.9, . When an application consumes messages from Kafka, it uses a Kafka consumer. These processes can either be running on the same machine or they can be distributed over many machines to provide scalability and fault tolerance for processing. Just like we did with the producer, you need to specify bootstrap servers. The connector uses this strategy by default if you explicitly enabled Kafka's auto-commit (with the enable.auto.commit attribute set to true ). The consumer is not thread safe and should not be shared across threads. The Kafka consumer commits the offset periodically when polling batches, as described above. I just got in Kafka and I was wondering if we should have enable.auto.commit to true or false. Kafka .NET Client | Confluent Documentation You also need to define a group.id that identifies which consumer group this consumer belongs. Kafka consumer commit thread-safety. In consumer-side transaction, kafka consumer consumes avro messages from the topic, processes them, save processed results to the external db where the offsets are also saved to the same external db, and finally all the db transactions will be commited in the atomic way. KafkaConsumer (kafka 2.2.0 API)
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