我在使用消费群消费kafka消息时收到重复消息。
我正在使用这个nodejs库。https://www.npmjs.com/package/kafka-node
我的消费代码如下

const config = require( '../../configs' );
const kafka = require( 'kafka-node' );

var options = {
    id: 'consumer1',
    kafkaHost: config.kafka.prod.kafka_host, //multiple kafka hosts (comma separated)
    groupId: "test-group2",
    sessionTimeout: 15000,
    protocol: ['roundrobin'],
    fromOffset: 'earliest'
};

var consumerGroup = new kafka.ConsumerGroup( options, 'my-replicated-topic3' );

consumerGroup.on( 'message', function ( message ) {
    console.log( message );
} );

我的成绩差了。

{ topic: 'my-replicated-topic3',
  value: '{"meta":{"topic":"my-replicated-topic3","added_at":"2019-02-22T09:25:54.708Z","server":"cron"},"data":"1550827554708 ::: Totam quis qui. Sit dolore laboriosam odio. Facilis porro et quam repellat pariatur. Ad voluptatem quidem."}',
  offset: 8941,
  partition: 0,
  highWaterOffset: 8966,
  key: null }
  ---
  ---
  ---
  ---
  { topic: 'my-replicated-topic3',
  value: '{"meta":{"topic":"my-replicated-topic3","added_at":"2019-02-22T09:25:54.708Z","server":"cron"},"data":"1550827554708 ::: Totam quis qui. Sit dolore laboriosam odio. Facilis porro et quam repellat pariatur. Ad voluptatem quidem."}',
  offset: 8941,
  partition: 0,
  highWaterOffset: 8970,
  key: null }

您可以看到，每隔几次记录之后，相同的消息就会重复出现。在这里，消息的偏移量是相同的，但highwateroffset与所有重复消息的偏移量不同。
请提出解决方法。