node.js - Nodejs kafka消费者无限循环

Question

我正在 ubuntu 16.04 机器上运行 kafka_2.11-2.0.0。创建一个主题并从命令行界面向其生成一些消息。

并从命令行启动消费者，它消耗得很好。

但是当我像下面这样启动nodejs消费者时，它正在无限迭代。我的客户端代码中是否缺少任何内容？

var kafka = require('kafka-node'),
Consumer = kafka.Consumer,
client = new kafka.Client(),
consumer = new Consumer(
    client,
    [
        {topic: 'mytopic', partition: 0}
    ],
    {
        autoCommit: true
    }
);
consumer.on('message', function (message) {
        console.log(message);
});
consumer.on('error', function (err){
        console.log(err);

})
consumer.on('offsetOutOfRange', function (err){
        console.log(err);
        process.exit();
})

这是输出。

{ topic: 'mytopic',
  value: '',
  offset: 0,
  partition: 0,
  highWaterOffset: 3,
  key: '' }
{ topic: 'mytopic',
  value: 'message2',
  offset: 1,
  partition: 0,
  highWaterOffset: 3,
  key: null }
{ topic: 'mytopic',
  value: 'message3',
  offset: 2,
  partition: 0,
  highWaterOffset: 3,
  key: null }
{ topic: 'mytopic',
  value: '',
  offset: 0,
  partition: 0,
  highWaterOffset: 3,
  key: '' }
{ topic: 'mytopic',
  value: '',
  offset: 0,
  partition: 0,
  highWaterOffset: 3,
  key: '' }
{ topic: 'mytopic',
  value: 'message2',
  offset: 1,
  partition: 0,
  highWaterOffset: 3,
  key: null }
{ topic: 'mytopic',
  value: 'message3',
  offset: 2,
  partition: 0,
  highWaterOffset: 3,
  key: null }
{ topic: 'mytopic',
  value: '',
  offset: 0,
  partition: 0,
  highWaterOffset: 3,
  key: '' }
{ topic: 'mytopic',
  value: '',
  offset: 0,
  partition: 0,
  highWaterOffset: 3,
  key: '' }
{ topic: 'mytopic',
  value: 'message2',
  offset: 1,
  partition: 0,
  highWaterOffset: 3,
  key: null }
{ topic: 'mytopic',
  value: 'message3',
  offset: 2,
  partition: 0,
  highWaterOffset: 3,
  key: null }
{ topic: 'mytopic',
  value: '',
  offset: 0,
  partition: 0,
  highWaterOffset: 3,
  key: '' }

Answer 1

终于发现kafka新版本2.0.0的问题。所以我转移到以前的版本，它现在可以工作了。