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Designing Resilient Distributed Systems with Martin Fowler's Idempotent Receiver Pattern

"In distributed system design, network communication is inherently unreliable. Networks experience latency, packet loss, and temporary partitions. When building microservices or event-driven architectures, developers often rely on message brokers like Apache Kafka, RabbitMQ, or AWS SQS to ensure delivery. Most of these messaging middleware platforms guarantee "at-least-once" delivery, meaning a message is guaranteed to arrive at its destination, but it may be delivered multiple times. To prevent duplicate messages from causing inconsistent data states—such as charging a customer twice for a single order—architects rely on the Idempotent Receiv..."

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