"Kafka Streams Exactly-Once 处理语义实践"

Kafka Streams Exactly-Once 处理语义实践配置要点`processing.guarantee=exactly_once_v2`设置 `application.id` 与 `bootstrap.servers`Java 示例Properties props = new Properties(); props.put(StreamsConfig.APPLICATION_ID_CONFIG, "app-eos"); props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092"); props.put(StreamsConfig.PROCESSING_GUARANTEE_CONFIG, StreamsConfig.EXACTLY_ONCE_V2); KafkaStreams streams = new KafkaStreams(builder.build(), props); streams.start(); 注意事项外部副作用需自管幂等；Kafka 内部主题与写入由 Streams 事务保障总结启用 EOSv2 简化一致性配置，适合对重复敏感的业务处理链路。