Caused by: com.rabbitmq.client.ShutdownSignalException: channel error； protocol method: #method＜chan

Caused by: com.rabbitmq.client.ShutdownSignalException: channel error; protocol method: #method<channel.close>(reply-code=404, reply-text=NOT_FOUND - no queue ‘queue_cms_postpage’ in vhost ‘/’, class-id=50, method-id=10)

今下午遇到的一个bug，花费较长时间网上搜寻，加询问最终解决，记录一下。

bug：org.springframework.amqp.rabbit.listener.BlockingQueueConsumer$DeclarationException: Failed to declare queue(s):[queue_cms_postpage]
	at org.springframework.amqp.rabbit.listener.BlockingQueueConsumer.attemptPassiveDeclarations(BlockingQueueConsumer.java:711) ~[spring-rabbit-2.0.3.RELEASE.jar:2.0.3.RELEASE]
	at org.springframework.amqp.rabbit.listener.BlockingQueueConsumer.start(BlockingQueueConsumer.java:588) ~[spring-rabbit-2.0.3.RELEASE.jar:2.0.3.RELEASE]
	at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:964) [spring-rabbit-2.0.3.RELEASE.jar:2.0.3.RELEASE]
	at java.lang.Thread.run(Thread.java:748) [na:1.8.0_181]
Caused by: java.io.IOException: null
	at com.rabbitmq.client.impl.AMQChannel.wrap(AMQChannel.java:126) ~[amqp-client-5.1.2.jar:5.1.2]
	at com.rabbitmq.client.impl.AMQChannel.wrap(AMQChannel.java:122) ~[amqp-client-5.1.2.jar:5.1.2]
	at com.rabbitmq.client.impl.AMQChannel.exnWrappingRpc(AMQChannel.java:144) ~[amqp-client-5.1.2.jar:5.1.2]
	at com.rabbitmq.client.impl.ChannelN.queueDeclarePassive(ChannelN.java:991) ~[amqp-client-5.1.2.jar:5.1.2]
	at com.rabbitmq.client.impl.ChannelN.queueDeclarePassive(ChannelN.java:52) ~[amqp-client-5.1.2.jar:5.1.2]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_181]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_181]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_181]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_181]
	at org.springframework.amqp.rabbit.connection.CachingConnectionFactory$CachedChannelInvocationHandler.invoke(CachingConnectionFactory.java:981) ~[spring-rabbit-2.0.3.RELEASE.jar:2.0.3.RELEASE]
	at com.sun.proxy.$Proxy107.queueDeclarePassive(Unknown Source) ~[na:na]
	at org.springframework.amqp.rabbit.listener.BlockingQueueConsumer.attemptPassiveDeclarations(BlockingQueueConsumer.java:690) ~[spring-rabbit-2.0.3.RELEASE.jar:2.0.3.RELEASE]
	... 3 common frames omitted
Caused by: com.rabbitmq.client.ShutdownSignalException: channel error; protocol method: #method<channel.close>(reply-code=404, reply-text=NOT_FOUND - no queue 'queue_cms_postpage' in vhost '/', class-id=50, method-id=10)
	at com.rabbitmq.utility.ValueOrException.getValue(ValueOrException.java:66) ~[amqp-client-5.1.2.jar:5.1.2]
	at com.rabbitmq.utility.BlockingValueOrException.uninterruptibleGetValue(BlockingValueOrException.java:36) ~[amqp-client-5.1.2.jar:5.1.2]
	at com.rabbitmq.client.impl.AMQChannel$BlockingRpcContinuation.getReply(AMQChannel.java:494) ~[amqp-client-5.1.2.jar:5.1.2]
	at com.rabbitmq.client.impl.AMQChannel.privateRpc(AMQChannel.java:288) ~[amqp-client-5.1.2.jar:5.1.2]
	at com.rabbitmq.client.impl.AMQChannel.exnWrappingRpc(AMQChannel.java:138) ~[amqp-client-5.1.2.jar:5.1.2]
	... 12 common frames omitted

经过上的搜寻有这么几种回答：
第一种：权限问题。问题在in vhost '/'在RabbitMQ 管理界面，把Exchanges，和Queues两个栏目的Virtual host 从"ALL"，改为"/"即可。

第二种：由于rabbitmq 消费者 监听消息队列时， 消息队列没有创建 导致上面的异常，这个我当时是创建了的。
第三种：第一次创建rabbitmq交换机后，更改交换机类型，继续创建时出现。原因时存在同名的交换机。比如rabbitmq服务器中已经存在direct类型的交换机（name=“exchange”），你再创建一个同名的但是类型为fanout时就会出错，需要更换名字后再创建。

而我的也没有重复，这时我就纳闷了。。。。
就在这时我突然发现了一个不寻常的地方，

 @RabbitListener(queues = {RabbitConfig.QUEUE_CMS_POSTPAGE})

好像没什么错，，，

yml配置中：
xuecheng:
  mq:
    #cms客户端监控的队列名称（不同的客户端监控的队列不能重复）
    queue: queue_cms_postpage_01
    routingKey: 5a751fab6abb5044e0d19ea1

我看这的时候，我？？？？？？？？

@Configuration
public class RabbitConfig {
    //队列bean的名称
    public static final String QUEUE_CMS_POSTPAGE = "queue_cms_postpage";
    //交换机的名称
    public static final String EX_ROUTING_CMS_POSTPAGE="ex_routing_cms_postpage";
    //队列的名称
    @Value("${xuecheng.mq.queue}")
    public  String queue_cms_postpage_name;
    //routingKey 即站点Id
    @Value("${xuecheng.mq.routingKey}")
    public  String routingKey;

再一看RabbitMQ配置文件,祖安的话语涌上心头，这个监听的队列竟然写成了队列bean的名称了！我真是日了狗啊。

@RabbitListener(queues = {"${xuecheng.mq.queue}"})

改成这样终于成功了。。

本文地址：https://blog.csdn.net/weixin_45954637/article/details/107498444