周五下午的时候升级了一个环境，跑了批处理sh升级脚本后，启动时报下列错误：
INFO | jvm 1 | 2017/02/24 17:39:09 | java.io.IOException
INFO | jvm 1 | 2017/02/24 17:39:09 | at com.rabbitmq.client.impl.AMQChannel.wrap(AMQChannel.java:106)
INFO | jvm 1 | 2017/02/24 17:39:09 | at com.rabbitmq.client.impl.AMQChannel.wrap(AMQChannel.java:102)
INFO | jvm 1 | 2017/02/24 17:39:09 | at com.rabbitmq.client.impl.AMQChannel.exnWrappingRpc(AMQChannel.java:124)
INFO | jvm 1 | 2017/02/24 17:39:09 | at com.rabbitmq.client.impl.AMQConnection.start(AMQConnection.java:378)
INFO | jvm 1 | 2017/02/24 17:39:09 | at com.rabbitmq.client.impl.recovery.RecoveryAwareAMQConnectionFactory.newConnection(RecoveryAwareAMQConnectionFactory.java:36)
INFO | jvm 1 | 2017/02/24 17:39:09 | at com.rabbitmq.client.impl.recovery.AutorecoveringConnection.init(AutorecoveringConnection.java:91)
INFO | jvm 1 | 2017/02/24 17:39:09 | at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:640)
INFO | jvm 1 | 2017/02/24 17:39:09 | at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:615)
INFO | jvm 1 | 2017/02/24 17:39:09 | at com.ld.net.rabbitmq.MutiConnectionFactory.newConnection(MutiConnectionFactory.java:28)
INFO | jvm 1 | 2017/02/24 17:39:09 | at com.ld.net.route.ExchangeManager.init(ExchangeManager.java:163)
INFO | jvm 1 | 2017/02/24 17:39:09 | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
INFO | jvm 1 | 2017/02/24 17:39:09 | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
INFO | jvm 1 | 2017/02/24 17:39:09 | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
INFO | jvm 1 | 2017/02/24 17:39:09 | at java.lang.reflect.Method.invoke(Method.java:498)
INFO | jvm 1 | 2017/02/24 17:39:09 | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeCustomInitMethod(AbstractAutowireCapableBeanFactory.java:1710)
INFO | jvm 1 | 2017/02/24 17:39:09 | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1649)
INFO | jvm 1 | 2017/02/24 17:39:09 | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578)
INFO | jvm 1 | 2017/02/24 17:39:09 | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
INFO | jvm 1 | 2017/02/24 17:39:09 | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
INFO | jvm 1 | 2017/02/24 17:39:09 | at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
INFO | jvm 1 | 2017/02/24 17:39:09 | at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
INFO | jvm 1 | 2017/02/24 17:39:09 | at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
INFO | jvm 1 | 2017/02/24 17:39:09 | at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
INFO | jvm 1 | 2017/02/24 17:39:09 | at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:778)
INFO | jvm 1 | 2017/02/24 17:39:09 | at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839)
INFO | jvm 1 | 2017/02/24 17:39:09 | at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)
INFO | jvm 1 | 2017/02/24 17:39:09 | at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
INFO | jvm 1 | 2017/02/24 17:39:09 | at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:93)
INFO | jvm 1 | 2017/02/24 17:39:09 | at com.ld.net.spring.ContainerInitilzation.start(ContainerInitilzation.java:9)
INFO | jvm 1 | 2017/02/24 17:39:09 | at com.ld.net.spring.StartServer.main(StartServer.java:38)
INFO | jvm 1 | 2017/02/24 17:39:09 | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
INFO | jvm 1 | 2017/02/24 17:39:09 | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
INFO | jvm 1 | 2017/02/24 17:39:09 | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
INFO | jvm 1 | 2017/02/24 17:39:09 | at java.lang.reflect.Method.invoke(Method.java:498)
INFO | jvm 1 | 2017/02/24 17:39:09 | at org.tanukisoftware.wrapper.WrapperSimpleApp.run(WrapperSimpleApp.java:325)
INFO | jvm 1 | 2017/02/24 17:39:09 | at java.lang.Thread.run(Thread.java:745)
INFO | jvm 1 | 2017/02/24 17:39:09 | Caused by: com.rabbitmq.client.ShutdownSignalException: connection error
INFO | jvm 1 | 2017/02/24 17:39:09 | at com.rabbitmq.utility.ValueOrException.getValue(ValueOrException.java:67)
INFO | jvm 1 | 2017/02/24 17:39:09 | at com.rabbitmq.utility.BlockingValueOrException.uninterruptibleGetValue(BlockingValueOrException.java:33)
INFO | jvm 1 | 2017/02/24 17:39:09 | at com.rabbitmq.client.impl.AMQChannel$BlockingRpcContinuation.getReply(AMQChannel.java:361)
INFO | jvm 1 | 2017/02/24 17:39:09 | at com.rabbitmq.client.impl.AMQChannel.privateRpc(AMQChannel.java:226)
INFO | jvm 1 | 2017/02/24 17:39:09 | at com.rabbitmq.client.impl.AMQChannel.exnWrappingRpc(AMQChannel.java:118)
INFO | jvm 1 | 2017/02/24 17:39:09 | ... 33 more
INFO | jvm 1 | 2017/02/24 17:39:09 | Caused by: java.net.SocketException: Connection reset
INFO | jvm 1 | 2017/02/24 17:39:09 | at java.net.SocketInputStream.read(SocketInputStream.java:209)
INFO | jvm 1 | 2017/02/24 17:39:09 | at java.net.SocketInputStream.read(SocketInputStream.java:141)
INFO | jvm 1 | 2017/02/24 17:39:09 | at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
INFO | jvm 1 | 2017/02/24 17:39:09 | at java.io.BufferedInputStream.read(BufferedInputStream.java:265)
INFO | jvm 1 | 2017/02/24 17:39:09 | at java.io.DataInputStream.readUnsignedByte(DataInputStream.java:288)
INFO | jvm 1 | 2017/02/24 17:39:09 | at com.rabbitmq.client.impl.Frame.readFrom(Frame.java:95)
INFO | jvm 1 | 2017/02/24 17:39:09 | at com.rabbitmq.client.impl.SocketFrameHandler.readFrame(SocketFrameHandler.java:139)
INFO | jvm 1 | 2017/02/24 17:39:09 | at com.rabbitmq.client.impl.AMQConnection$MainLoop.run(AMQConnection.java:536)
INFO | jvm 1 | 2017/02/24 17:39:09 | ... 1 more
配置文件、/etc/hosts、防火墙这些都仔细检查了，就是看不出有任何问题，关键连接到另外一个MQ时就没有问题，着实折腾了半个多小时在反复回撤验证。
于是不得不一个个对比，瞬间会想起这套环境的配置和其他机器都不一样，其他环境对外的虚拟主机名都是/route，这台是/，由于2B给客户使用，上线之后就不得不维持着不一致在哪儿，然后就出现上面这个错误了。
只是这错误提示相当坑爹哇，改为正确的vhost之后，问题即解决。这样看来，后面所有的升级都得带上backup/clean的脚本，保不齐有些环境可能因为历史遗留问题就存在不一致的情况。
