hard20 pts · first answer countskafkadelivery-semantics

Committing offsets too early

A consumer polls a batch, commits the offsets immediately, then writes the batch to the database. It crashes after the commit but before the write. What happens on restart?

A.The batch is processed twiceB.Kafka detects the crash and replays the batch automaticallyC.The consumer reads the batch again because the write failedD.The batch is lost, because the group resumes after the committed offsets (at-most-once)

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Committing offsets too early

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