[Solved] Identify the error in this Kafka Streams configuration for exactly-once:props.put("processing.guarantee", "at_least_once"); props.put("enable.idempotence", "true"); | Kafka

Kafka - Advanced Stream Processing

Identify the error in this Kafka Streams configuration for exactly-once:

props.put("processing.guarantee", "at_least_once");
props.put("enable.idempotence", "true");

ABoth properties are correct for exactly-once

Bprocessing.guarantee should be set to exactly_once

Cenable.idempotence should be false for exactly-once

Dprocessing.guarantee is deprecated and ignored

Step-by-Step Solution

Solution:

Step 1: Check processing.guarantee value
For exactly-once, processing.guarantee must be "exactly_once".
Step 2: Evaluate enable.idempotence
enable.idempotence=true is correct and needed.
Final Answer:
processing.guarantee should be set to exactly_once -> Option B
Quick Check:
processing.guarantee=exactly_once needed [OK]

Quick Trick: Set processing.guarantee=exactly_once for exactly-once [OK]

Common Mistakes:

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