RabbitMq无法连接([AMQP Connection xx.xx.xx.xx:5672-119] ERROR com.rabbitmq.client.impl.ForgivingExcept)_[amqp connection 192.168.11.100:5672] error com.ra

报错信息

[AMQP Connection xx.xx.xx.xx:5672-119] ERROR com.rabbitmq.client.impl.ForgivingExceptionHandler 119 log - An unexpected connection driver error occured java.net.SocketException: socket closed
我的服务器原来安装过RabbitMq 而且一直用的挺舒适，大概几个月没用，今天想用mqtt协议，但是启动的时候给我提示这个错误。一脸懵逼，之前明明好好的，怎么就突然不让连接了呢？这种事情最讨厌了。

• 第一反应是账号权限问题，但是发现没问题。
• 然后看了一下状态rabbitmqctl status

C:\Users\Administrator>rabbitmqctl status
Status of node rabbit@xxxxxx ...
Error: unable to perform an operation on node 'xxxxxxx'. Please s
ee diagnostics information and suggestions below.

Most common reasons for this are:

* Target node is unreachable (e.g. due to hostname resolution, TCP connection o
r firewall issues)
* CLI tool fails to authenticate with the server (e.g. due to CLI tool's Erlang
cookie not matching that of the server)
* Target node is not running

In addition to the diagnostics info below:

* See the CLI, clustering and networking guides on http://rabbitmq.com/document
ation.html to learn more
* Consult server logs on node rabbit@xxxxxx

DIAGNOSTICS
===========

attempted to contact: [xxxxxxx]

rabbit@iZpa12hzjf4z5qZ:
 * connected to epmd (port 4369) onxxxxx
 * epmd reports node 'rabbit' uses port 25672 for inter-node and CLI tool traff
ic
 * TCP connection succeeded but Erlang distribution failed

 * Authentication failed (rejected by the remote node), please check the Erlang
cookie


Current node details:
* node name: rabbitmqcli72@xxxxxx
* effective user's home directory: C:\Users\Administrator
* Erlang cookie hash: xxxxxx
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然后参考了一下 https://blog.csdn.net/J_Shine/article/details/78833456

找到C:\Windows\System32\config\systemprofile下有个.erlang.cookie文件，内容与C:\User\lujie.erlang.cookie不一样，不让编辑，于是复制了一下，使内容一致，然后重启，再rabbitmqctl status 正常了，但是连接仍然报错。没完没了了还…

Virtual host / experienced an error on node rabbit@wohu-rabbit and may be  inaccessible
1

发现这个问题后 我找到了RabbitMq的安装目录 下面有个db文件夹，我把里面东西都删掉了（需要权限->先进去删，然后再出来删）。
重启，解决。