How to re-read a message from Kafka?

In Kafka, to re-read a message, you need to manage the consumer's offset.

If you want to read a message again, you can:

1. Reset the offset to the desired value (for example, to the beginning of the topic or to a specific offset).
2. Use the seek() method in KafkaConsumer to set the read position.

Example in Java:

consumer.assign(Collections.singleton(topicPartition));
consumer.seek(topicPartition, offsetToReRead);

while (true) {
    ConsumerRecords<String, String> records = consumer.poll(Duration.ofMillis(100));
    for (ConsumerRecord<String, String> record : records) {
        // process messages
    }
}

You can also use the kafka-consumer-groups.sh command to reset the offset from the command line.