advancedCapstone & Synthesis
Why does a production-grade Kafka pipeline treat 'exactly the message was delivered' as insufficient on its own, without also verifying business-level correctness?
Delivery guarantees (at-least-once, exactly-once) are a Kafka-level correctness property about the messaging layer, not a guarantee that your business logic correctly interpreted and acted on that message — a message can be delivered exactly once yet still be processed with a bug, so monitoring and testing need to validate business outcomes, not just delivery semantics.
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