[Solved] How can a Kafka consumer ensure exactly-once processing of messages when consuming from a topic? — Ans: Use transactions with producer and consumer to commit offsets atomically | Kafka

Kafka - Consumers

How can a Kafka consumer ensure exactly-once processing of messages when consuming from a topic?

ADisable offset commits and rely on message timestamps

BUse transactions with producer and consumer to commit offsets atomically

CManually commit offsets before processing messages

DProcess messages multiple times to guarantee delivery

Step-by-Step Solution

Solution:

Step 1: Understand exactly-once semantics
Exactly-once requires atomic commit of message processing and offset committing.
Step 2: Use Kafka transactions
Kafka supports transactions to atomically commit producer writes and consumer offsets.
Final Answer:
Use transactions with producer and consumer to commit offsets atomically -> Option B
Quick Check:
Transactions enable exactly-once processing [OK]

Quick Trick: Use transactions to atomically commit offsets and processing [OK]

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