rocketmq Don't have SubscriptionGroup

1. 问题描述

rocketmq 生产者发消息正常 mq后台也可以看到发出的消息

但是消费者一直没消费 好像订阅没成功

2. 问题排查

通过上图查看 确实没有检测到订阅者

3. 问题解决

线上环境是 两台机器 共四个实例

项目中订阅了两个不同地址不同topic的mq

然后那个instanceName会有命名冲突

ip@进程id

重新修改instanceName的value

//设置instanceName
 defaultMQPushConsumer.setInstanceName(System.currentTimeMillis()+ JVMRandom.nextLong(10)+"");

spring-rocketmq.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns="http://www.springframework.org/schema/beans"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd">
 
    <!--好评加分 差评扣分-->
    <bean id="evaluationConsumer" class="org.apache.rocketmq.client.consumer.DefaultMQPushConsumer">
        <property name="consumerGroup" value="${driver_x_group}"/>
        <property name="namesrvAddr" value="${driver_x_url}"/>
    </bean>
    <!--好评消费者 监听器-->
    <bean id="evaluationMessageListener" class="com.x.mq.EvaluationXListener"/>
    <!--消费者启动类-->
    <bean id="evaluationOrderlyConsumer" class="com.x.mq.base.EvaluationXConsumer"
          init-method="init" destroy-method="destroy" scope="singleton">
        <property name="defaultMQPushConsumer" ref="evaluationConsumer"/>
        <property name="evaluationMessageListener" ref="evaluationMessageListener"/>
        <property name="topic" value="${driver_score_topic}"/>
        <property name="tag" value=""/>
    </bean>
</beans>

consumer.java

package com.x.mq.base;
 
import com.x.mq.EvaluationMessageListener;
import org.apache.commons.lang.math.JVMRandom;
import org.apache.rocketmq.client.consumer.DefaultMQPushConsumer;
import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.common.consumer.ConsumeFromWhere;
import org.apache.rocketmq.common.protocol.heartbeat.MessageModel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
 
import java.util.Random;
 
/**
 * Created by admin on 2018/1/31.
 */
public class EvaluationConsumer {
    private static final Logger logger = LoggerFactory.getLogger(EvaluationConsumer.class);
    private DefaultMQPushConsumer defaultMQPushConsumer;
    private EvaluationMessageListener evaluationMessageListener;
    private String tag;
    private String topic;
 
    public EvaluationMessageListener getEvaluationMessageListener() {
        return evaluationMessageListener;
    }
 
    public void setEvaluationMessageListener(EvaluationMessageListener evaluationMessageListener) {
        this.evaluationMessageListener = evaluationMessageListener;
    }
 
    public String getTag() {
        return tag;
    }
 
    public void setTag(String tag) {
        this.tag = tag;
    }
 
    public String getTopic() {
        return topic;
    }
 
    public void setTopic(String topic) {
        this.topic = topic;
    }
 
    public DefaultMQPushConsumer getDefaultMQPushConsumer() {
        return defaultMQPushConsumer;
    }
 
    public void setDefaultMQPushConsumer(DefaultMQPushConsumer defaultMQPushConsumer) {
        this.defaultMQPushConsumer = defaultMQPushConsumer;
    }
 
    public void init() throws MQClientException {
        // 订阅指定Topic下tags
        defaultMQPushConsumer.subscribe(topic, tag);
        // 设置Consumer第一次启动是从队列头部开始消费还是队列尾部开始消费<br>
        // 如果非第一次启动，那么按照上次消费的位置继续消费
        defaultMQPushConsumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_LAST_OFFSET);
        // 设置为集群消费(区别于广播消费)：集群只消费一次，广播会被多个消费者消费
        defaultMQPushConsumer.setMessageModel(MessageModel.CLUSTERING);
//        defaultMQPushConsumer.registerMessageListener(messageListenerConcurrently);
        defaultMQPushConsumer.registerMessageListener(evaluationMessageListener);
        //设置instanceName
        defaultMQPushConsumer.setInstanceName(System.currentTimeMillis()+ JVMRandom.nextLong(10)+"");
        // 批量消费
        defaultMQPushConsumer.setConsumeMessageBatchMaxSize(20);
        // Consumer对象在使用之前必须要调用start初始化，初始化一次即可<br>
        defaultMQPushConsumer.start();
        logger.info("==rocketmq==DefaultMQPushConsumer start success! consumerGroup:{},nameServiceAddr:{},topic:{},tag:{}",defaultMQPushConsumer.getConsumerGroup(),defaultMQPushConsumer.getNamesrvAddr(),topic,tag);
    }
    public void destroy(){
        defaultMQPushConsumer.shutdown();
    }
}