Programmer XiaoFu

Jul 24, 2024 · Backend Development

Root‑Cause Solutions for Kafka Message Duplicates

The article analyzes why Kafka messages are duplicated on both producer and consumer sides, explains at‑most‑once, at‑least‑once, and exactly‑once delivery semantics, and walks through three concrete remedies—idempotent producers, transactions, and consumer‑side deduplication—backed by configuration details, code samples, and practical deployment steps.