rabbitmq - 到 RabbitMQ 队列的第一条消息导致 channel 关闭

Question

发送到我队列的第一条消息总是失败。从第二个开始，一切正常!

不确定这是否可读:

Created new connection: rabbitConnectionFactory#1b940034:0/SimpleConnection@2c52fbff [delegate=amqp://guest@10.0.0.10:5672/, localPort= 36370]

Channel shutdown: channel error; protocol method: #method<channel.close>(reply-code=406, reply-text=PRECONDITION_FAILED - inequivalent arg 'auto_delete' for exchange 'rabbitmq_exchange' in vhost '/': received 'false' but current is 'true', class-id=40, method-id=10)

我不确定为什么会这样，因为我每次都在新的 VM(AWS EC2 实例)上启动它。 “当前”怎么可能是真的？

我想在 Spring Boot 发布者中配置有问题:

不确定这是否可读:

@Configuration
public class RabbitMqConfig {
    @Bean
    Queue queue() {
        return new Queue(System.getenv("RABBITMQ_QUEUE_NAME"), true,false, false);
    }

    @Bean
    DirectExchange exchange() {
        return new DirectExchange(System.getenv("RABBITMQ_EXCHANGE_NAME"), true, false);
    }

    @Bean
    Binding binding(Queue queue, DirectExchange exchange) {
        return BindingBuilder.bind(queue).to(exchange).with(System.getenv("RABBITMQ_ROUTING_KEY"));
    }

    @Bean
    public MessageConverter jsonMessageConverter(){
        return new Jackson2JsonMessageConverter();
    }

    public AmqpTemplate rabbitTemplate(ConnectionFactory connectionFactory) {
        final RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory);
        rabbitTemplate.setMessageConverter(jsonMessageConverter());
        return rabbitTemplate;
    }
}

那么这里出了什么问题？谢谢!

Answer 1

错误很明显...

Channel shutdown: channel error; protocol method: #method(reply-code=406, reply-text=PRECONDITION_FAILED - inequivalent arg 'auto_delete' for exchange 'rabbitmq_exchange' in vhost '/': received 'false' but current is 'true', class-id=40, method-id=10)

当第一次打开连接时，框架会查找队列/绑定(bind)等并声明它们。如果队列已经存在，它必须具有相同的属性/参数。

@Bean
Queue queue() {
    return new Queue(System.getenv("RABBITMQ_QUEUE_NAME"), true, false, false);
}

据推测，在消费者方面，它被声明为具有不同的属性......

@Bean
Queue queue() {
    return new Queue(System.getenv("RABBITMQ_QUEUE_NAME"), true, false, true);
}

(auto_delete 是不等价的)。

它们必须相同。