[Solved] Given the following Kafka producer code snippet:props.put("acks", "1"); producer.send(record);What happens if the leader broker crashes before replicating the message? | Kafka

Kafka - Producers

Given the following Kafka producer code snippet:

props.put("acks", "1");
producer.send(record);

What happens if the leader broker crashes before replicating the message?

AThe producer waits indefinitely for all replicas to acknowledge.

BThe producer retries sending the message until all replicas confirm.

CThe producer considers the message sent successfully, but replicas may not have it.

DThe producer throws an error immediately.

Step-by-Step Solution

Solution:

Step 1: Understand acks=1 behavior
With acks=1, the producer waits only for the leader's acknowledgment.
Step 2: Consider leader crash before replication
If the leader crashes before replicating, the producer still considers the message sent because leader ack was received.
Final Answer:
The producer considers the message sent successfully, but replicas may not have it. -> Option C
Quick Check:
acks=1 waits leader ack only, risk of lost replicas [OK]

Quick Trick: acks=1 waits leader ack only, replicas may lag [OK]

Common Mistakes:

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