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You want to send messages with keys to ensure ordering per key in Kafka. Which ProducerRecord constructor should you use?

hard📝 Application Q15 of 15
Kafka - Producers
You want to send messages with keys to ensure ordering per key in Kafka. Which ProducerRecord constructor should you use?
AProducerRecord(String topic, K key, V value)
BProducerRecord(String topic, V value)
CProducerRecord(K key, V value)
DProducerRecord(String topic)
Step-by-Step Solution
Solution:

  1. Step 1: Understand ordering by key in Kafka

    Kafka guarantees ordering within a partition, and keys determine partition assignment.

  2. Step 2: Identify correct ProducerRecord constructor

    To send with a key, use the constructor that includes topic, key, and value.

  3. Final Answer:

    ProducerRecord(String topic, K key, V value) -> Option A

  4. Quick Check:

    Use constructor with topic, key, and value for ordering [OK]
Quick Trick: Include key in ProducerRecord to maintain order [OK]
Common Mistakes:
  • Using constructor without key loses ordering
  • Omitting topic causes errors
  • Confusing key and value parameters

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