RabbitMQ报错CannotdetermineReplyTomessagepropertyvalue

　　在使用RabbitMQ进行测试时，后台报了很多错误信息。2023-04-08 16:21:00.526  WARN 20764 --- [org.springframework.amqp.rabbit.RabbitListenerEndpointContainer#0-1] s.a.r.l.ConditionalRejectingErrorHandler : Execution of Rabbit message listener failed.   org.springframework.amqp.rabbit.support.ListenerExecutionFailedException: Listener threw exception     at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.wrapToListenerExecutionFailedExceptionIfNeeded(AbstractMessageListenerContainer.java:1787) ~[spring-rabbit-2.4.9.jar:2.4.9]     at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:1677) ~[spring-rabbit-2.4.9.jar:2.4.9]     at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.actualInvokeListener(AbstractMessageListenerContainer.java:1592) ~[spring-rabbit-2.4.9.jar:2.4.9]     at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:1580) ~[spring-rabbit-2.4.9.jar:2.4.9]     at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:1571) ~[spring-rabbit-2.4.9.jar:2.4.9]     at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.executeListener(AbstractMessageListenerContainer.java:1515) ~[spring-rabbit-2.4.9.jar:2.4.9]     at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.doReceiveAndExecute(SimpleMessageListenerContainer.java:994) [spring-rabbit-2.4.9.jar:2.4.9]     at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.receiveAndExecute(SimpleMessageListenerContainer.java:941) [spring-rabbit-2.4.9.jar:2.4.9]     at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$1600(SimpleMessageListenerContainer.java:85) [spring-rabbit-2.4.9.jar:2.4.9]     at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.mainLoop(SimpleMessageListenerContainer.java:1319) [spring-rabbit-2.4.9.jar:2.4.9]     at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1225) [spring-rabbit-2.4.9.jar:2.4.9]     at java.lang.Thread.run(Thread.java:748) [na:1.8.0_281] Caused by: org.springframework.amqp.rabbit.listener.adapter.ReplyFailureException: Failed to send reply with payload ＂InvocationResult [returnValue=my message, returnType=class java.lang.String, bean=com.example.hello.listener.RabbitMQListener@435ce306, method=public java.lang.String com.example.hello.listener.RabbitMQListener.handleMsg(java.lang.String)]＂     at org.springframework.amqp.rabbit.listener.adapter.AbstractAdaptableMessageListener.doHandleResult(AbstractAdaptableMessageListener.java:492) ~[spring-rabbit-2.4.9.jar:2.4.9]     at org.springframework.amqp.rabbit.listener.adapter.AbstractAdaptableMessageListener.handleResult(AbstractAdaptableMessageListener.java:416) ~[spring-rabbit-2.4.9.jar:2.4.9]     at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.invokeHandlerAndProcessResult(MessagingMessageListenerAdapter.java:211) ~[spring-rabbit-2.4.9.jar:2.4.9]     at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.onMessage(MessagingMessageListenerAdapter.java:148) ~[spring-rabbit-2.4.9.jar:2.4.9]     at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:1673) ~[spring-rabbit-2.4.9.jar:2.4.9]     ... 10 common frames omitted Caused by: org.springframework.amqp.AmqpException: Cannot determine ReplyTo message property value: Request message does not contain reply-to property, and no default response Exchange was set.     at org.springframework.amqp.rabbit.listener.adapter.AbstractAdaptableMessageListener.getReplyToAddress(AbstractAdaptableMessageListener.java:592) ~[spring-rabbit-2.4.9.jar:2.4.9]     at org.springframework.amqp.rabbit.listener.adapter.AbstractAdaptableMessageListener.doHandleResult(AbstractAdaptableMessageListener.java:488) ~[spring-rabbit-2.4.9.jar:2.4.9]     ... 14 common frames omitted
　　仔细检查了下配置，没有发现问题。
　　看报错信息是＂ReplyTo message ＂，貌似是返回值有问题。
　　检查了下出现问题的方法，这个方法确实有个返回值。@Component public class RabbitMQListener {      @RabbitListener(queues = ＂myqueue＂)     public String handleMsg(String msg){         System.out.println(msg);         return msg;     } }
　　将这个方法给我无返回值后，就没有再报错。
　　看来使用@RabbitListener时不能有返回值。
　　正确的方式如下：@Component public class RabbitMQListener {      @RabbitListener(queues = ＂myqueue＂)     public void handleMsg(String msg){         System.out.println(msg);     } }