springBoot 整合 RabbitMQ 的坑

1、Consumer raised exception, processing can restart if the connection factory supports it. Exception summary: org.springframework.amqp.AmqpConnectException: java.net.ConnectException: Connection refused

这个很明显，没有连接配置。增加一个配置文件。

（笨方式，测试用，实际可采用配置文件方式。）

@Configuration
public class RabbitMqConfig {

    @Bean
    public ConnectionFactory connectionFactory() {
        CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
        connectionFactory.setAddresses("192.168.0.0:5672");
        connectionFactory.setUsername("nei");
        connectionFactory.setPassword("zha");
        connectionFactory.setVirtualHost("vhost_nei");
        connectionFactory.setPublisherConfirms(true);//消息确认
        connectionFactory.setPublisherReturns(true);
        return connectionFactory;
    }

　　//注意此下两个bean 有用  有坑时用到
    @Bean
    public RabbitTemplate rabbitTemplate(ConnectionFactory connectionFactory) {
        RabbitTemplate template = new RabbitTemplate(connectionFactory);
        template.setMessageConverter(new Jackson2JsonMessageConverter());
        return template;
    }

    @Bean
    public SimpleRabbitListenerContainerFactory rabbitListenerContainerFactory(ConnectionFactory connectionFactory) {
        SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
        factory.setConnectionFactory(connectionFactory);
        factory.setMessageConverter(new Jackson2JsonMessageConverter());
        return factory;
    }

}

2、队列不存在

org.springframework.amqp.rabbit.listener.QueuesNotAvailableException: Cannot prepare queue for listener. Either the queue doesn't exist or the broker will not allow us to use it.
    at org.springframework.amqp.rabbit.listener.BlockingQueueConsumer.start(BlockingQueueConsumer.java:514)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1280)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.amqp.rabbit.listener.BlockingQueueConsumer$DeclarationException: Failed to declare queue(s):[hello]
    at org.springframework.amqp.rabbit.listener.BlockingQueueConsumer.attemptPassiveDeclarations(BlockingQueueConsumer.java:587)
    at org.springframework.amqp.rabbit.listener.BlockingQueueConsumer.start(BlockingQueueConsumer.java:486)
    ... 2 common frames omitted
Caused by: java.io.IOException: null
    at com.rabbitmq.client.impl.AMQChannel.wrap(AMQChannel.java:106)
    at com.rabbitmq.client.impl.AMQChannel.wrap(AMQChannel.java:102)
    at com.rabbitmq.client.impl.AMQChannel.exnWrappingRpc(AMQChannel.java:124)
    at com.rabbitmq.client.impl.ChannelN.queueDeclarePassive(ChannelN.java:885)
    at com.rabbitmq.client.impl.ChannelN.queueDeclarePassive(ChannelN.java:61)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.amqp.rabbit.connection.CachingConnectionFactory$CachedChannelInvocationHandler.invoke(CachingConnectionFactory.java:917)
    at com.sun.proxy.$Proxy140.queueDeclarePassive(Unknown Source)
    at org.springframework.amqp.rabbit.listener.BlockingQueueConsumer.attemptPassiveDeclarations(BlockingQueueConsumer.java:566)
    ... 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 'hello' in vhost '/', class-id=50, method-id=10)
    at com.rabbitmq.utility.ValueOrException.getValue(ValueOrException.java:67)
    at com.rabbitmq.utility.BlockingValueOrException.uninterruptibleGetValue(BlockingValueOrException.java:33)
    at com.rabbitmq.client.impl.AMQChannel$BlockingRpcContinuation.getReply(AMQChannel.java:361)
    at com.rabbitmq.client.impl.AMQChannel.privateRpc(AMQChannel.java:226)
    at com.rabbitmq.client.impl.AMQChannel.exnWrappingRpc(AMQChannel.java:118)
    ... 12 common frames omitted
Caused by: com.rabbitmq.client.ShutdownSignalException: channel error; protocol method: #method<channel.close>(reply-code=404, reply-text=NOT_FOUND - no queue 'hello' in vhost '/', class-id=50, method-id=10)
    at com.rabbitmq.client.impl.ChannelN.asyncShutdown(ChannelN.java:484)
    at com.rabbitmq.client.impl.ChannelN.processAsync(ChannelN.java:321)
    at com.rabbitmq.client.impl.AMQChannel.handleCompleteInboundCommand(AMQChannel.java:144)
    at com.rabbitmq.client.impl.AMQChannel.handleFrame(AMQChannel.java:91)
    at com.rabbitmq.client.impl.AMQConnection$MainLoop.run(AMQConnection.java:560)
    ... 1 common frames omitted
14:38:51.463 [SimpleAsyncTaskExecutor-1] ERROR o.s.a.r.l.SimpleMessageListenerContainer - Stopping container from aborted consumer
14:38:51.478 [localhost-startStop-1] ERROR o.s.boot.SpringApplication - Application startup failed
org.springframework.context.ApplicationContextException: Failed to start bean 'org.springframework.amqp.rabbit.config.internalRabbitListenerEndpointRegistry'; nested exception is org.springframework.amqp.AmqpIllegalStateException: Fatal exception on listener startup
    at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:176)
    at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:51)
    at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:346)
    at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:149)
    at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:112)
    at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:874)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.finishRefresh(EmbeddedWebApplicationContext.java:144)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:544)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:761)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:371)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
    at org.springframework.boot.web.support.SpringBootServletInitializer.run(SpringBootServletInitializer.java:151)
    at org.springframework.boot.web.support.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:131)
    at org.springframework.boot.web.support.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:86)
    at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:169)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5183)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:152)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1403)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1393)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.amqp.AmqpIllegalStateException: Fatal exception on listener startup
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.doStart(SimpleMessageListenerContainer.java:820)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.start(AbstractMessageListenerContainer.java:550)
    at org.springframework.amqp.rabbit.listener.RabbitListenerEndpointRegistry.startIfNecessary(RabbitListenerEndpointRegistry.java:272)
    at org.springframework.amqp.rabbit.listener.RabbitListenerEndpointRegistry.start(RabbitListenerEndpointRegistry.java:235)
    at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:173)
    ... 23 common frames omitted
Caused by: org.springframework.amqp.rabbit.listener.QueuesNotAvailableException: Cannot prepare queue for listener. Either the queue doesn't exist or the broker will not allow us to use it.
    at org.springframework.amqp.rabbit.listener.BlockingQueueConsumer.start(BlockingQueueConsumer.java:514)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1280)
    ... 1 common frames omitted
Caused by: org.springframework.amqp.rabbit.listener.BlockingQueueConsumer$DeclarationException: Failed to declare queue(s):[hello]
    at org.springframework.amqp.rabbit.listener.BlockingQueueConsumer.attemptPassiveDeclarations(BlockingQueueConsumer.java:587)
    at org.springframework.amqp.rabbit.listener.BlockingQueueConsumer.start(BlockingQueueConsumer.java:486)
    ... 2 common frames omitted

3、无限循环报 org.springframework.amqp.AmqpException: No method found for class 。。。  我的是找不到HashMap。实际应该是一些官方BUG，参照一位网友的解决方案。：

https://www.cnblogs.com/lazio10000/p/5559999.html （感谢）

  @Bean
    public RabbitTemplate rabbitTemplate(ConnectionFactory connectionFactory) {
        RabbitTemplate template = new RabbitTemplate(connectionFactory);
        template.setMessageConverter(new Jackson2JsonMessageConverter());
        return template;
    }

    @Bean
    public SimpleRabbitListenerContainerFactory rabbitListenerContainerFactory(ConnectionFactory connectionFactory) {
        SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
        factory.setConnectionFactory(connectionFactory);
        factory.setMessageConverter(new Jackson2JsonMessageConverter());
        return factory;
    }

消费者里添加  containerFactory="rabbitListenerContainerFactory"  @Payload

@RabbitListener(queues = "task", containerFactory="rabbitListenerContainerFactory")
public void process(@Payload String str) { 
    
    logger.info("============="+str);
 }