Achieving End-to-End Exactly-Once Semantics in Apache Flink with Apache Kafka
Two-Phase Commit in Flink Sink Operators
Flink achieves exactly-once guarantees for external systems through an implementation of the Two-Phase Commit (2PC) protocol. The core mechanism aligns transaction boundaries with checkpoint barriers. When a sink operator receives the first record of a checkpoint interval or encounters a checkpoint barri ...
Posted on Sat, 13 Jun 2026 17:01:31 +0000 by mj99