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Jun 15, 2026 · Backend Development

From Auto to Manual: Mastering Consumer Offsets for Ten‑Million QPS Systems

The article examines a real payment loss incident caused by Kafka's default automatic offset commit, explains why automatic commits become a hidden trap at high traffic, and provides a step‑by‑step guide to switching to manual commits with async‑first, sync‑fallback, idempotency, dead‑letter handling, batch strategies, and concurrency controls for reliable ten‑million QPS consumption.