Question

我想收到mqtt消息，这就是我为mqtt使用spring实现的原因，包括paho library和mosquito brocker。

问题是当我在本地（在我自己的电脑上）测试mqtt频道时，一切都运行良好。但是当我将配置传输到服务器并在那里开始测试时，我收到了一个异常

ERROR taskScheduler-1 inbound.MqttPahoMessageDrivenChannelAdapter:289 - Exception while connecting and subscribing Client is disconnected (32101)

这种行为可能是什么原因？

我的配置文件如下：

@Configuration
@PropertySource("${configuration.properties.path}")
@ComponentScan({"package.1", "package.2", "package.3"})    
@IntegrationComponentScan({"package.1", "package.2"})  
@EnableIntegration
public class TransportMqttConfigBean {

@Autowired
Environment env;

@Bean
public MqttPahoClientFactory mqttClientFactory(){       
    return new DefaultMqttPahoClientFactory();      
}   

@Bean
@Description("Channel for mqtt messages that leave outbound adapter (should be received)")
public MessageChannel mqttInputChannel() {
    return new DirectChannel();     
}

@Bean
@Description("Channel for mqtt messages that come into inbound adapter (should be sent)")
public MessageChannel mqttOutputChannel() {     
    return new DirectChannel();
}   

@Bean
@Description("Channel for mqtt messages with payload")
public MessageChannel mqttGeneralChannel() {        
    return new DirectChannel();
}   

@Bean
@Description("Channel for mqtt errors")
public MessageChannel mqttErrorChannel() {      
    return new DirectChannel();
}   

@Bean
@Description("mqtt inbound adapter: receives mqtt messages")
public MessageProducer mqttInboundAdapter() {
    log.info("creating mqtt inbound adapter");
    MqttPahoMessageDrivenChannelAdapter adapter =
            new MqttPahoMessageDrivenChannelAdapter(
                    env.getProperty("mqtt.hostname")+":" +env.getProperty("mqtt.port"), 
                    "name",
                    "#");
    adapter.setCompletionTimeout(5000);
    adapter.setConverter(new DefaultPahoMessageConverter());
    adapter.setQos(1);
    adapter.setOutputChannel(mqttInputChannel());
    adapter.setErrorChannel(mqttErrorChannel());
    return adapter;
}

@Bean
@Description("mqtt outbound adapter: sends mqtt messages")
@ServiceActivator(inputChannel = "mqttOutputChannel")
public MessageHandler mqttOutboundAdapter() {
    log.info("creating mqtt outbound adapter");
    MqttPahoMessageHandler messageHandler =
                   new MqttPahoMessageHandler(
                           env.getProperty("mqtt.hostname")+":" +env.getProperty("mqtt.port"), 
                           "name2", 
                           mqttClientFactory());
    messageHandler.setAsync(true);
    messageHandler.setDefaultTopic("escosTopic");
    return messageHandler;
}

@Bean 
public ApplicationListener<?> applicationListener(){
      ApplicationEventListeningMessageProducer producer=new ApplicationEventListeningMessageProducer();
      producer.setEventTypes(MqttConnectionFailedEvent.class);
      producer.setOutputChannel(mqttErrorChannel());
      return producer;
   }
}

Answer 1

Mqtt订户的

ClientId必须是唯一的。发生这种情况是因为您的两个订户具有相同的客户端ID。首先在本地计算机上运行，然后在服务器上运行。 Second与Mqtt经纪人断开连接。

在您的代码中，您是这样做的

MqttPahoMessageHandler messageHandler =
                   new MqttPahoMessageHandler(
                           env.getProperty("mqtt.hostname")+":" +env.getProperty("mqtt.port"), 
                           "name2", 
                           mqttClientFactory());

看到您将其称为“ name2” 尝试使用该代码段

String url = env.getProperty("mqtt.hostname") + ":" + env.getProperty("mqtt.port");
String clientId = "subAt" + InetAddress.getLocalHost().getHostName();
MqttPahoMessageHandler messageHandler =
                new MqttPahoMessageHandler(url,clientId,mqttClientFactory());

它将添加到运行您的软件的计算机的clientId主机名。

MQTT无法通过配置进行连接

1 个答案: