我在 github 搜索到一个有点年头了 但是可能有关的 issue ， 这个 issue 已经关闭了，本来还想留言来着 https://github.com/eclipse/paho.mqtt.java/issues/323
我使用 Spring-Integration-mqtt 模块发送和接收 MQTT 消息，发生以下异常：
2024-10-22 10:56:45.161 [][] ERROR o.s.i.handler.LoggingHandler:250 - org.springframework.messaging.MessageHandlingException: Failed to publish to MQTT in the [bean 'mqttOutboundHandler' for component 'mqttOutboundFlow.org.springframework.integration.config.ConsumerEndpointFactoryBean#1'; defined in: 'class path resource [com/rms/config/mqtt/MqttConfig.class]'; from source: 'com.rms.config.mqtt.MqttConfig.mqttOutboundHandler(org.eclipse.paho.mqttv5.client.MqttConnectionOptions)'], failedMessage=GenericMessage [payload={"value":[],"unitId":741,"fieldName":"landingCall-down-front-1-32","isRunningData":false,"isError":false}, headers={replyChannel=nullChannel, errorChannel=, mqtt_qos=0, id=1237ba75-e408-10ff-e322-5f692dd8970e, mqtt_topic=status/741/landingCall-down-front-1-32, timestamp=1729565799271}] at org.springframework.integration.mqtt.outbound.Mqttv5PahoMessageHandler.publish(Mqttv5PahoMessageHandler.java:283) at org.springframework.integration.mqtt.outbound.Mqttv5PahoMessageHandler.handleMessageInternal(Mqttv5PahoMessageHandler.java:222) at org.springframework.integration.handler.AbstractMessageHandler.doHandleMessage(AbstractMessageHandler.java:105) at org.springframework.integration.handler.AbstractMessageHandler.handleWithMetrics(AbstractMessageHandler.java:90) at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:70) at org.springframework.integration.dispatcher.AbstractDispatcher.tryOptimizedDispatch(AbstractDispatcher.java:132) at org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:148) at org.springframework.integration.dispatcher.UnicastingDispatcher$1.run(UnicastingDispatcher.java:129) at org.springframework.integration.util.ErrorHandlingTaskExecutor.lambda$execute$0(ErrorHandlingTaskExecutor.java:56) at java.base/java.util.concurrent.ThreadPerTaskExecutor$TaskRunner.run(ThreadPerTaskExecutor.java:314) at java.base/java.lang.VirtualThread.run(VirtualThread.java:311) Caused by: Internal error, caused by no new message IDs being avilable (32001) at org.eclipse.paho.mqttv5.client.internal.ExceptionHelper.createMqttException(ExceptionHelper.java:32) at org.eclipse.paho.mqttv5.client.internal.ClientState.getNextMessageId(ClientState.java:1454) at org.eclipse.paho.mqttv5.client.internal.ClientState.send(ClientState.java:511) at org.eclipse.paho.mqttv5.client.internal.ClientComms.internalSend(ClientComms.java:155) at org.eclipse.paho.mqttv5.client.internal.ClientComms.sendNoWait(ClientComms.java:218) at org.eclipse.paho.mqttv5.client.MqttAsyncClient.publish(MqttAsyncClient.java:1530) at org.eclipse.paho.mqttv5.client.MqttAsyncClient.publish(MqttAsyncClient.java:1499) at org.springframework.integration.mqtt.outbound.Mqttv5PahoMessageHandler.publish(Mqttv5PahoMessageHandler.java:271) ... 10 more 环境:
- SpringBoot 3.2.5
- java21
- PahoMQTT1.2.5 下面是我的核心逻辑。我使用 Spring-Integration 集成流程配置了两个 Mqtt 客户端。一个用于接收信息，另一个用于发送消息。发送消息的频率约为每秒 5000 条消息。
mqtt: client-id-inbound: rms-inbound client-id-outbound: rms-outbound url: tcp://127.0.0.1:1883 username: rms password: 123456 import java.util.concurrent.Executors; @Configuration @IntegrationComponentScan("com.rms.config") @Slf4j @ConfigurationProperties(prefix = "mqtt") @Data public class MqttConfig { private String clientIdInbound; private String clientIdOutbound; private String url; private String password; private String username; @Bean public MqttConnectionOptions mqttConnectOptions(){ MqttConnectionOptions optiOns= new MqttConnectionOptions(); options.setServerURIs(new String[] { url}); options.setUserName(username); options.setPassword(password.getBytes()); options.setAutomaticReconnect(true); return options; } @Bean public ClientManager<IMqttAsyncClient, MqttConnectionOptions> clientManager(MqttConnectionOptions options) { Mqttv5ClientManager clientManager = new Mqttv5ClientManager(options, clientIdInbound); clientManager.setPersistence(new MqttDefaultFilePersistence()); return clientManager; } @Bean public SimpleMessageConverter simpleMessageConverter(){ return new SimpleMessageConverter(); } @Bean public MessageHandler mqttOutboundHandler(MqttConnectionOptions connectionOptions) { Mqttv5PahoMessageHandler messageHandler = new Mqttv5PahoMessageHandler(connectionOptions,clientIdOutbound); messageHandler.setAsync(true); messageHandler.setDefaultTopic("defaultTopic"); messageHandler.setDefaultQos(MqttQoS.AT_MOST_ONCE.value()); messageHandler.setConverter(simpleMessageConverter()); return messageHandler; } @Bean public IntegrationFlow mqttOutboundFlow(MessageHandler mqttOutboundHandler){ return IntegrationFlow.from("mqttOutboundChannel") .channel(MessageChannels.executor(Executors.newVirtualThreadPerTaskExecutor())) .handle(mqttOutboundHandler) .get(); } @Bean public IntegrationFlow statusInboundFlow(ClientManager<IMqttAsyncClient, MqttConnectionOptions> clientManage){ Mqttv5PahoMessageDrivenChannelAdapter messageProducer = new Mqttv5PahoMessageDrivenChannelAdapter(clientManage, "status/+/#"); return IntegrationFlow.from(messageProducer) .channel(MessageChannels.executor(Executors.newVirtualThreadPerTaskExecutor())) .transform(Transformers.objectToString()) .transform(Transformers.fromJson(Prop.class)) .route(Prop.class,prop->{ if (Boolean.TRUE.equals(prop.getIsError())){ return "errorDataChannel"; } else if (Boolean.TRUE.equals(prop.getIsRunningData())){ return "runningDataChannel"; } else { return "discardChannel"; } }) .get(); } @Bean public CanProtocolLoader canProtocolLoader(){ return new CanProtocolLoader(); } @Bean public UnitErrorHandler errorLogHandler(LogService logService ){ return new UnitErrorHandler(logService); } @Bean public UnitRunningDataHandler unitRunningDataHandler(LogService logService){ return new UnitRunningDataHandler(logService); } @Bean public IntegrationFlow errorLogChannelFlow(UnitErrorHandler unitErrorHandler){ return IntegrationFlow.from("errorDataChannel") .channel(MessageChannels.executor(Executors.newVirtualThreadPerTaskExecutor())) .handle(unitErrorHandler) .get(); } @Bean public IntegrationFlow runningDataChannelFlow(UnitRunningDataHandler runningDataHandler){ return IntegrationFlow.from("runningDataChannel") .channel(MessageChannels.executor(Executors.newVirtualThreadPerTaskExecutor())) .handle(runningDataHandler) .get(); } @Bean public IntegrationFlow discardChannelFlow(){ return IntegrationFlow.from("discardChannel") .channel(MessageChannels.executor(Executors.newVirtualThreadPerTaskExecutor())) .handle(message -> { }) .get(); } } @Slf4j @RequiredArgsConstructor public class UnitErrorHandler implements MessageHandler { private final LogService logService; @Override public void handleMessage(Message<?> message) throws MessagingException { Prop<?> prop = (Prop<?>) message.getPayload(); logService.saveErrorLog(prop); } } 我使用 MessagingGateway 注释将消息定向到我的 mqttOutboundChannel ，以便我可以使用 MqttGateway 发送 mqtt 消息
@MessagingGateway(defaultRequestChannel = "mqttOutboundChannel") public interface MqttGateway { void sendToMqtt(String data); void sendToTopic(String payload, @Header(MqttHeaders.TOPIC)String topic); void sendToTopic(String payload, @Header(MqttHeaders.TOPIC)String topic,@Header(MqttHeaders.QOS ) int qos); void sendWithResp(String payload, @Header(MqttHeaders.TOPIC)String topic,@Header(MqttHeaders.RESPONSE_TOPIC) String responseTopic,@Header(MqttHeaders.QOS ) int qos); } 当消息投递率很低，一般每秒不到 200 条消息时，我一开始提到的错误就不会出现，但是当我将消息投递率提高到 5000 条时，按照上面的配置就开始出现报错，另外如果我去掉了 mqtt 消息的入站部分，也就是上面的代码中引入 的 statusInboundFlow 集成 Flow 后 发送消息又不报错了
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