求助： GoLang MQTT 客户端使用问题

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这是一个创建于 116 天前的主题，其中的信息可能已经有所发展或是发生改变。

我遇到的问题:

2024-08-29 07:13:10	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_5 , error = pingresp not received, disconnecting
2024-08-29 07:13:14	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_88 , error = pingresp not received, disconnecting
2024-08-29 07:13:15	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_43 , error = pingresp not received, disconnecting
2024-08-29 07:13:15	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_72 , error = pingresp not received, disconnecting
2024-08-29 07:13:15	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_1 , error = pingresp not received, disconnecting
2024-08-29 07:13:17	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_37 , error = pingresp not received, disconnecting
2024-08-29 07:13:18	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_10 , error = pingresp not received, disconnecting
2024-08-29 07:14:13	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_52 , error = pingresp not received, disconnecting
2024-08-29 07:14:18	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_59 , error = pingresp not received, disconnecting
2024-08-29 07:14:19	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_84 , error = pingresp not received, disconnecting
2024-08-29 07:14:19	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_54 , error = pingresp not received, disconnecting
2024-08-29 07:14:21	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_22 , error = pingresp not received, disconnecting
2024-08-29 07:14:22	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_12 , error = pingresp not received, disconnecting
2024-08-29 07:14:23	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_25 , error = pingresp not received, disconnecting
2024-08-29 07:14:24	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_97 , error = pingresp not received, disconnecting
2024-08-29 07:14:26	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_36 , error = pingresp not received, disconnecting
2024-08-29 07:15:08	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_63 , error = pingresp not received, disconnecting
2024-08-29 07:15:16	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_23 , error = pingresp not received, disconnecting
2024-08-29 07:15:19	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_96 , error = pingresp not received, disconnecting
2024-08-29 07:15:20	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_50 , error = pingresp not received, disconnecting
2024-08-29 07:15:25	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_75 , error = pingresp not received, disconnecting
2024-08-29 07:15:30	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_78 , error = pingresp not received, disconnecting
2024-08-29 07:15:36	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_7 , error = pingresp not received, disconnecting
2024-08-29 07:15:39	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_97 , error = pingresp not received, disconnecting
2024-08-29 07:16:17	error	go-iot/mqtt_service.go:40	mqtt connection lost id = TT_79 , error = pingresp not received, disconnecting

这是我正在使用的程序代码

package main

import (
	"encoding/json"
	"fmt"
	mqtt "github.com/eclipse/paho.mqtt.golang"
	"go.uber.org/zap"
	"sync"
	"time"
)

// MqttInterface 定义了 MQTT 客户端的基本接口
type MqttInterface struct {
	client mqtt.Client
	Id     string
	Chan   chan []byte
	Config MqttConfig
	wg     sync.WaitGroup
}

// NewMqttClient 初始化并返回一个新的 MqttInterface 实例
func NewMqttClient(id string, config MqttConfig) *MqttInterface {
	return &MqttInterface{
		Id:     id,
		Chan:   make(chan []byte, 1000),
		Config: config,
	}
}

// Connect 连接到 MQTT 服务器
func (m *MqttInterface) Connect(host, username, password string, port int) error {
	opts := mqtt.NewClientOptions()
	opts.AddBroker(fmt.Sprintf("tcp://%s:%d", host, port))
	opts.SetUsername(username)
	opts.SetAutoReconnect(false)
	opts.SetPassword(password)
	opts.SetClientID(m.Id)
	//opts.SetDefaultPublishHandler(m.messageHandler)
	opts.OnConnectionLost = func(client mqtt.Client, err error) {
		zap.S().Errorf("mqtt connection lost id = %s , error = %+v", m.Id, err)
		StopMqttClient(m.Id, m.Config)
	}

	opts.SetOrderMatters(false)
	opts.SetKeepAlive(60 * time.Second)
	// 创建并启动客户端
	client := mqtt.NewClient(opts)
	if token := client.Connect(); token.Wait() && token.Error() != nil {
		return token.Error()
	}

	m.client = client
	return nil
}

// messageHandler 处理接收到的消息
func (m *MqttInterface) messageHandler(client mqtt.Client, msg mqtt.Message) {

}

// Subscribe 订阅一个或多个主题
func (m *MqttInterface) Subscribe(topics string) error {
	var token = m.client.Subscribe(topics, 0, func(client mqtt.Client, msg mqtt.Message) {
		m.wg.Add(1)
		defer func() {
			m.wg.Done()
			//zap.S().Errorf("mqtt subscribe id = %s , topic = %s", m.Id, msg.Topic())
		}()
		mqttMsg := MQTTMessage{
			MQTTClientID: m.Id,
			Message:      string(msg.Payload()),
		}
		jsonData, _ := json.Marshal(mqttMsg)

		m.Chan <- jsonData

	})

	if token.Wait() && token.Error() != nil {
		zap.S().Errorf(token.Error().Error())
		return token.Error()
	}
	return nil
}

// Publish 向一个主题发布消息
func (m *MqttInterface) Publish(topic string, payload interface{}) {
	token := m.client.Publish(topic, 0, false, payload)
	token.Wait()
}

// Disconnect 断开与 MQTT 服务器的连接
func (m *MqttInterface) Disconnect() {
	m.client.Disconnect(250)
}

func (m *MqttInterface) HandlerMsg() {
	for {
		c := <-m.Chan
		PushToQueue("pre_handler", c)

	}
}

创建 MQTT 客户端和开启订阅

	client := NewMqttClient(clientId,config)
	err := client.Connect(broker, username, password, port)
	if err != nil {
		zap.S().Errorf("mqtt connect err = %v", err)
        return false
	}
	go client.Subscribe(subTopic)
	go client.HandlerMsg()

请问这个问题应该如何解决。

我的尝试

我发起了一个 Issues ，我理解是让消息接收后进行异步处理 https://github.com/eclipse/paho.mqtt.golang/issues/686
修改程序如下

	var token = m.client.Subscribe(topics, 0, func(client mqtt.Client, msg mqtt.Message) {
		go func() {
			mqttMsg := MQTTMessage{
				MQTTClientID: m.Id,
				Message:      string(msg.Payload()),
			}
			jsonData, _ := json.Marshal(mqttMsg)

			m.Chan <- jsonData
		}()

	})

上述两个操作均没有得到正常处理。请问应当如何解决这个问题。

3 条回复

ForrestWang

116 天前

不太理解你遇到了什么问题，可以描述一下吗

brucemaclin

116 天前

连 1883 抓包看日志显示 ping 的回包没收到断链

huifer

116 天前

就是正常来讲不会出现：mqtt connection lost id = TT_79 , error = pingresp not received, disconnecting 问题。我正在尝试 1883 这个链接。我更新了一下 ISSUES

https://github.com/eclipse/paho.mqtt.golang/issues/688

谢谢大家的回复 @ForrestWang @brucemaclin