Bird
Raised Fist0

Why does Kafka require transactional.id to be unique per producer instance for Exactly-once semantics?

hard🧠 Conceptual Q10 of Q15
Kafka - Message Delivery Semantics
Why does Kafka require transactional.id to be unique per producer instance for Exactly-once semantics?
ATo track and recover transactions uniquely across producer restarts
BTo enable multiple producers to share the same transaction
CTo disable idempotence for that producer
DTo allow consumers to commit transactions
Step-by-Step Solution
Solution:

  1. Step 1: Understand transactional.id role in EOS

    It uniquely identifies the producer's transaction scope for recovery and fencing.

  2. Step 2: Explain why uniqueness is required

    Unique transactional.id prevents conflicts and allows Kafka to track and recover incomplete transactions after failures.

  3. Final Answer:

    To track and recover transactions uniquely across producer restarts -> Option A

  4. Quick Check:

    Unique transactional.id = transaction recovery [OK]
Quick Trick: Unique transactional.id enables transaction recovery [OK]
Common Mistakes:
MISTAKES
  • Thinking multiple producers share same transactional.id
  • Confusing transactional.id with idempotence toggle
  • Assuming consumers commit transactions

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More Kafka Quizzes
Kafka Streams - KStream and KTable concepts - Quiz 3easy Kafka Streams - Stream topology - Quiz 3easy Kafka Streams - KStream and KTable concepts - Quiz 15hard Kafka Streams - KStream and KTable concepts - Quiz 13medium Kafka Streams - Stream topology - Quiz 4medium Kafka with Java/Python - Error handling in clients - Quiz 4medium Kafka with Java/Python - Client metrics monitoring - Quiz 14medium Kafka with Java/Python - Java producer client - Quiz 2easy Message Delivery Semantics - Consumer offset commit strategies - Quiz 7medium Message Delivery Semantics - Idempotent producer - Quiz 2easy