If a Kafka producer is configured with acks=all and min.insync.replicas=2, what happens when only one replica is in sync?

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Kafka - Producers

If a Kafka producer is configured with acks=all and min.insync.replicas=2, what happens when only one replica is in sync?

AThe producer retries sending until all replicas are in sync.

BThe producer will fail to send the message and throw an exception.

CThe producer waits for the leader only and succeeds.

DThe producer sends the message without waiting for replicas.

Step-by-Step Solution

Solution:

Step 1: Understand acks=all with min.insync.replicas
With acks=all, the producer waits for all in-sync replicas to acknowledge.
Step 2: Check min.insync.replicas condition
If fewer than min.insync.replicas are available, the broker rejects the message, causing producer failure.
Final Answer:
The producer will fail to send the message and throw an exception. -> Option B
Quick Check:
acks=all + min.insync.replicas enforces strict replication [OK]

Quick Trick: acks=all with min.insync.replicas enforces strict success [OK]

Common Mistakes:

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