Kafka 事务性之幂等性实现 | Matt's Blog



Kafka 事务性之幂等性实现 | Matt's Blog

Apache Kafka 从 0.11.0 开始,支持了一个非常大的 feature,就是对事务性的支持,在 Kafka 中关于事务性,是有三种层面上的含义:一是幂等性的支持;二是事务性的支持;三是 Kafka Streams 的 exactly once 的实现,关于 Kafka 事务性系列的文章我们只重点关注前两种层面上的事务性,与 Kafka Streams 相关的内容暂时不做讨论。社区从开始讨论事务性,前后持续近半年时间,相关的设计文档有六十几页(参考 Exactly Once Delivery and Transactional Messaging in Kafka)。事务性这部分的实现也是非常复杂的,之前 Producer 端的代码实现其实是非常简单的,增加事务性的逻辑之后,这部分代码复杂度提高了很多,本篇及后面几篇关于事务性的文章会以 2.0.0 版的代码实现为例,对这部分做了一下分析,计划分为五篇文章:

  1. 第一篇:Kafka 幂等性实现;
  2. 第二篇:Kafka 事务性实现;
  3. 第三篇:Kafka 事务性相关处理请求在 Server 端如何处理及其实现细节;
  4. 第四篇:关于 Kafka 事务性实现的一些思考,也会简单介绍一下 RocketMQ 事务性的实现,做一下对比;
  5. 第五篇:Flink + Kafka 如何实现 Exactly Once;


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