RabbitMQ自学之路—— RabbitMQ错误信息提示

不念不忘少年蓝@ 2021-12-24 07:17 1075阅读 0赞

## 1、rabbitmq配置host有误 ##

spring:
      rabbitmq: 
        #服务器ip
        host: 127.0.0.1
        #端口号 默认的端口5672
        port: 5672
        #用户名  默认是guest
        username: admin
        #密码 默认是guest
        password: 123456

Exception in thread "main" java.net.UnknownHostException: locathost
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:195)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
    at java.net.Socket.connect(Socket.java:529)
    at com.rabbitmq.client.impl.FrameHandlerFactory.create(FrameHandlerFactory.java:32)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:588)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:612)
    at com.aaa.test.Send.main(Send.java:19)

## 2、rabbitmq配置ip地址有误 ##

Exception in thread "main" java.net.ConnectException: Connection timed out: connect
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
    at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
    at java.net.Socket.connect(Socket.java:529)
    at com.rabbitmq.client.impl.FrameHandlerFactory.create(FrameHandlerFactory.java:32)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:588)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:612)
    at com.aaatest.Send.main(Send.java:19)

## 3、rabbitmq端口号配置有误 ： ##

Exception in thread "main" java.net.ConnectException: Connection refused: connect
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
    at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
    at java.net.Socket.connect(Socket.java:529)
    at com.rabbitmq.client.impl.FrameHandlerFactory.create(FrameHandlerFactory.java:32)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:588)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:612)
    at com.aaa.test.Send.main(Send.java:19)

## 4、rabbitmq用户名或者密码配置有误 ##

Exception in thread "main" com.rabbitmq.client.AuthenticationFailureException: ACCESS_REFUSED - Login was refused using authentication mechanism PLAIN. For details see the broker logfile.
    at com.rabbitmq.client.impl.AMQConnection.start(AMQConnection.java:338)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:590)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:612)
    at com.aaa.test.Send.main(Send.java:19)

## 5、Execution of Rabbit message listener failed. Listener threw exception ##

RabbitMq 消费者监听生产者传来的对象出错。

1、将生产者传过去的实体类对象实现序列化 implements Serializable。  
2、如果还是一样的错，你就得去RabbitMQ客户端上的队列消息先删除，因为那些队列消息还是原先的错误的消息。你再重新开程序，就没问题了。

## 6、rabbitmq DeclarationException: Failed to declare queue异常 ##

创建队列进行消息发送的时候报错

![在这里插入图片描述][20190627234452389.png]

原因：deal\_deom4Exchange队列找不到

排除发现没有在@Configuration文件中配置该队列，这是因为我在配置类中写的是![在这里插入图片描述][20190627234635366.png]  
不小心写错队列名称了，改过来即可。  
![在这里插入图片描述][20190627234532549.png]

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[20190627234452389.png]: /images/20211223/aa50620a165b4c42be37ce759ab2f72a.png
[20190627234635366.png]: /images/20211223/cbfffc6c216647dba2101256f6243232.png
[20190627234532549.png]: /images/20211223/115d960dc7954f498e0b22a6f044c20f.png