Rabbitmq 消费者 : Exception (504) Reason: “channel/connection is not open“-Toy模板网

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Rabbitmq 消费者 : Exception (504) Reason: “channel/connection is not open”

启动微服务 Rabbitmq 时，定位 ch.consume() 出现异常

一、问题分析

分析日志：no exchange ‘log_topic’

> docker logs rabbitMQ_1
2023-02-10 04:17:17.221260+00:00 [error] <0.834.0> Channel error on connection <
0.819.0> (172.19.0.1:51534 -> 172.19.0.4:5672, vhost: '/', user: 'guest'), chann
el 2:
2023-02-10 04:17:17.221260+00:00 [error] <0.834.0> operation queue.bind caused a
 channel exception not_found: no exchange 'log_topic' in vhost '/'

二、检查代码

consumer.go 中，ch.QueueBind 绑定在 “log_topic”

func (consumer *Consumer) Listen(topics []string) error {
	ch, err := consumer.conn.Channel()
	if err != nil {
		log.Println("channel: ", err)
		return err
	}
	defer ch.Close()

	q, err := declareRandomQueue(ch)
	if err != nil {
		log.Println("declareRandomQueue: ", err)
		return err
	}

	for _, tpoic := range topics {
		ch.QueueBind(
			q.Name,
			tpoic,
			"log_topic",
			false,
			nil,
		)

		if err != nil {
			return err
		}
	}

	msg, err := ch.Consume(q.Name, "", true, false, false, false, nil)
	if err != nil {
		log.Println("message: ", err)
		return err
	}

	forever := make(chan bool)
	go func() {
		for d := range msg {
			var payload Payload
			_ = json.Unmarshal(d.Body, &payload)

			go handlePayload(payload)
		}
	}()
	fmt.Printf("Waiting for message on [Exchange, Queue] [log_topic, %s\n]", q.Name)
	<-forever

	return nil
}

event.go 中，ch.ExchangeDeclare 配置的是 “logs_topic”

func declareExchange(ch *amqp.Channel) error {
	return ch.ExchangeDeclare(
		"logs_topic", //name
		"topic",     //type
		true,        //durable
		false,       //auto delete
		false,       //internal
		false,       //no wait
		nil,         //arguements
	)
}