转自：https://blog.csdn.net/zht741322694/article/details/82801873
在服务器上安装了一个RabbitMq,并新创建了一个用户授予了管理员角色，登录控制台查看一切正常，兴高采烈启动项目进行连接，结果一盆冷水下来，报如下错误：
o.s.a.r.l.SimpleMessageListenerContainer : Failed to check/redeclare auto-delete queue(s).
org.springframework.amqp.AmqpConnectException: java.net.ConnectException: Connection refused: connect
at org.springframework.amqp.rabbit.support.RabbitExceptionTranslator.convertRabbitAccessException(RabbitExceptionTranslator.java:62) ~[spring-rabbit-1.7.4.RELEASE.jar:na]
at org.springframework.amqp.rabbit.connection.AbstractConnectionFactory.createBareConnection(AbstractConnectionFactory.java:368) ~[spring-rabbit-1.7.4.RELEASE.jar:na]
at org.springframework.amqp.rabbit.connection.CachingConnectionFactory.createConnection(CachingConnectionFactory.java:573) ~[spring-rabbit-1.7.4.RELEASE.jar:na]
at org.springframework.amqp.rabbit.core.RabbitTemplate.doExecute(RabbitTemplate.java:1430) ~[spring-rabbit-1.7.4.RELEASE.jar:na]
at org.springframework.amqp.rabbit.core.RabbitTemplate.execute(RabbitTemplate.java:1411) ~[spring-rabbit-1.7.4.RELEASE.jar:na]
at org.springframework.amqp.rabbit.core.RabbitTemplate.execute(RabbitTemplate.java:1387) ~[spring-rabbit-1.7.4.RELEASE.jar:na]
at org.springframework.amqp.rabbit.core.RabbitAdmin.getQueueProperties(RabbitAdmin.java:336) ~[spring-rabbit-1.7.4.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.redeclareElementsIfNecessary(SimpleMessageListenerContainer.java:1171) ~[spring-rabbit-1.7.4.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1422) [spring-rabbit-1.7.4.RELEASE.jar:na]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131]
2018-09-21 14:44:55.695 ERROR [bootstrap,,,] 9248 --- [.168.4.201:5672] c.r.c.impl.ForgivingExceptionHandler : An unexpected connection driver error occured
java.net.SocketException: socket closed
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
at java.net.SocketInputStream.read(SocketInputStream.java:170)
at java.net.SocketInputStream.read(SocketInputStream.java:141)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
at java.io.BufferedInputStream.read(BufferedInputStream.java:265)
at java.io.DataInputStream.readUnsignedByte(DataInputStream.java:288)
at com.rabbitmq.client.impl.Frame.readFrom(Frame.java:91)
at com.rabbitmq.client.impl.SocketFrameHandler.readFrame(SocketFrameHandler.java:164)
at com.rabbitmq.client.impl.AMQConnection$MainLoop.run(AMQConnection.java:571)
at java.lang.Thread.run(Thread.java:745)
起先以为是配置错误，确认配置没问题后，百度一下，发现是给用户授予了角色，只能登录控制台，但是没有给读写以及管理队列的权限，通过控制台admin按钮查看
通过命令授权
语法： set_permissions [-p <vhostpath>] <user> <conf> <write> <read>
执行： rabbitmqctl set permissions -p / admin .* .* .* 完成对admin的授权,然后启动项目就正常了
