前言

• erlang 23.1
• rabbitmq server v3.8.9
• win 10

问题描述

使用 rabbitmqctl 命令时出现错误：

C:\Program Files\RabbitMQ Server\rabbitmq_server-3.8.9\sbin> rabbitmqctl status
Error: unable to perform an operation on node 'rabbit@DESKTOP-1GHM2HM'. Please see diagnostics information and suggestions below.

Most common reasons for this are:

 * Target node is unreachable (e.g. due to hostname resolution, TCP connection or 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 https://rabbitmq.com/documentation.html to learn more
 * Consult server logs on node rabbit@DESKTOP-1GHM2HM
 * If target node is configured to use long node names, don't forget to use --longnames with CLI tools

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

attempted to contact: ['rabbit@DESKTOP-1GHM2HM']

rabbit@DESKTOP-1GHM2HM:
  * connected to epmd (port 4369) on DESKTOP-1GHM2HM
  * epmd reports node 'rabbit' uses port 25672 for inter-node and CLI tool traffic
  * TCP connection succeeded but Erlang distribution failed

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


Current node details:
 * node name: 'rabbitmqcli-20064-rabbit@DESKTOP-1GHM2HM'
 * effective user's home directory: C:\Users\admin
 * Erlang cookie hash: 37DhljkMemAT0RSfiJUaUQ==

有用的错误信息：Authentication failed (rejected by the remote node), please check the Erlang cookie

错误分析

官方说明 如下

核心思想是：RabbitMQ Windows service启动时使用的 erlang cookie，与 RabbitMQ 命令行执行时使用的 erlang cookie，位置不一致。

解决办法

官方解决办法是：复制RabbitMQ Windows service启动时使用的 erlang cookie，覆盖掉RabbitMQ 命令行执行时使用的 erlang cookie。

非官方解决办法有：

• 按照低版本的 erlang。(PS: 这个没试过)
• 使用命令行启动 RabbitMQ 。（执行 rabbitmq-server.bat 命令启动 RabbitMQ）

参考

https://www.rabbitmq.com/cli.html#erlang-cookie
https://blog.csdn.net/J_Shine/article/details/78833456
https://www.cnblogs.com/hellxz/p/9104028.html
https://blog.csdn.net/yangl1337905751/article/details/80318055
https://www.rabbitmq.com/install-windows-manual.html