问题描述

在使用RocketMQ的可视化工具dashboard-1.0.0时，首先生产了10条数据，但是查询时却查出来了14条，有四条数据重复，重复数据MessageID和key相同，但是通过key单独查询却只能查出一条

测试代码

package com.fdw.rocketmq.producer;import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.client.producer.DefaultMQProducer;
import org.apache.rocketmq.common.message.Message;
import org.apache.rocketmq.remoting.exception.RemotingException;public class OneWayProducer {public static void main(String[] args) throws MQClientException, RemotingException, InterruptedException {int messageCount = 10;DefaultMQProducer producer = new DefaultMQProducer("pg");producer.setNamesrvAddr("127.0.0.1:9876");// 设置发送超时时限为5s，默认3sproducer.setSendMsgTimeout(5000);