How to read data using Kafka Consumer API from beginning?

Question

Please can anyone tell me how to read messages using the Kafka Consumer API from the beginning every time when I run the consumer.

Answer 1

If you are using the java consumer api more specifically org.apache.kafka.clients.consumer.Consumer, You can try the seek* methods.

consumer.seekToBeginning(consumer.assignment())

Here, consumer.assignment() returns all the partitions assigned to a given consumer and seekToBeginning will start from the earliest offset for the given collection of partitions.