注:0.9版本Kafka的一个重大改变就是consumer和producer API的重新设计. 这篇Kafka的文档大致介绍了对于consumer API重新设计时想要实现的功能.0.9版本的确实现了这些功能,具体细节有几篇文档讲了,以后会翻译. Motivation We've received quite a lot of feedback on the consumer side features over the past few months. Some of them are im