[Solved] Examine this Kafka producer configuration snippet:props.put("enable.idempotence", "true"); props.... props.put("retries", 5);What is the issue if the goal is to guarantee idempotent message delivery? | Kafka

Kafka - Message Delivery Semantics

Examine this Kafka producer configuration snippet:

props.put("enable.idempotence", "true");
props.put("acks", "1");
props.put("retries", 5);

What is the issue if the goal is to guarantee idempotent message delivery?

ASetting <code>acks</code> to "1" can cause message duplication despite idempotence.

BThe <code>retries</code> value is too low for idempotence.

CThe <code>enable.idempotence</code> value should be boolean true, not string.

DThere is no issue; this configuration guarantees idempotence.

Step-by-Step Solution

Solution:

Step 1: Understand idempotence requirements
Idempotence requires acks=all to ensure the broker fully commits messages.
Step 2: Analyze acks setting
Setting acks=1 means leader only, risking duplicates if leader fails before replication.
Step 3: Check other settings
retries=5 is acceptable; enable.idempotence as string "true" is correct.
Final Answer:
Setting acks to "1" can cause message duplication despite idempotence. -> Option A
Quick Check:
Idempotence requires acks=all [OK]

Quick Trick: Idempotence needs acks=all, not acks=1 [OK]

Common Mistakes:

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