rabbitmq群集无法连接到节点

我已经在两台机器上安装了rabbitmq。它们都工作得很好。 然后运行命令：

rabbitmqctl join\u cluster--ramrabbit@rabbit1

，它不起作用。错误信息：

Error: unable to connect to nodes [rabbit@rabbit1]: nodedown

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

attempted to contact: [rabbit@rabbit1]

rabbit@rabbit1:
* connected to epmd (port 4369) on rabbit1
* epmd reports node 'rabbit' running on port 25672
* TCP connection succeeded but Erlang distribution failed

* Hostname mismatch: node "rabbit@localhost" believes its host is different. 
Please ensure that hostnames resolve the same way locally and on 
"rabbit@localhost"


current node details:
- node name: 'rabbitmq-cli-66@localhost'
- home dir: /var/lib/rabbitmq
- cookie hash: 9z8msPdTpEUf5GeMrHGIqQ==

我在google中搜索了它，并修改了我的/etc/hosts文件：

127.0.0.1 rabbit2  localhost localhost.localdomain localhost4 
localhost4.localdomain4
::1 rabbit2        localhost localhost.localdomain localhost6 
localhost6.localdomain6

11.168.1.232 rabbit1
11.168.1.172 rabbit2

---

而我制作的.erlang.cookie也是一样的。

当我修改/etc/hosts时，我只是通过重新启动操作系统解决了这个问题。最后它成功了，我想是/etc/hosts没有生效。

可能是防火墙？不，我通过重新启动操作系统解决了这个问题。