How to reset offset in Kafka consumer?

by mathias.schinner , in category: Other , a year ago

How to reset offset in Kafka consumer?

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1 answer

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by jackie , a year ago

@mathias.schinner 

There are several ways to reset the offset of a Kafka consumer, depending on the version of Kafka and the specific use case. Here are some options:

  1. Seek to a specific offset: You can use the seek() method of the KafkaConsumer object to set the offset of the consumer to a specific value. For example:
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consumer.seek(topic, partition, offset)


  1. Manually reset the offset in the consumer configuration: You can set the auto.offset.reset property in the consumer configuration to earliest, latest, or none, depending on your desired behavior. For example:
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properties.setProperty("auto.offset.reset", "earliest");


  1. Use the Kafka Consumer Group API: If you are using consumer groups, you can use the resetOffsets() method of the AdminClient object to reset the offsets for a particular group. This method allows you to specify the offsets for each partition in the group, as well as the time at which the reset should take effect.
  2. Use the Kafka CLI: You can use the kafka-consumer-groups command line tool to reset the offsets for a consumer group. This tool is part of the Apache Kafka distribution and can be used to reset the offsets to a specific value, or to the earliest or latest offset available.


It's worth noting that resetting the offset of a consumer can have unintended consequences, as it can cause the consumer to re-consume messages that it has already processed. It's generally a good idea to carefully consider the implications of resetting the offset before doing so.