Featured Idempotency, Exactly‑Once, and Other Lies We Tell Ourselves
Distributed systems don’t behave the way the docs say they do. We’re told we have “exactly‑once delivery,” “guaranteed processing,” and “idempotent handlers,” but the moment a region fails over, a consumer crashes mid‑write, or an operator hits “retry,” those guarantees evaporate. This session cuts through the marketing and shows what really happens inside queues, event buses, and serverless runtimes when the world gets messy.