到这一步就报错了，前面的步骤按部就班完成了，重试了好几遍还是不行

bhz72：rabbitmqctl join_cluster --ram rabbit@bhz71

报错信息：

[root@root143 rabbitmq]# rabbitmqctl join_cluster --ram rabbit@root142

Clustering node rabbit@root143 with rabbit@root142 ...

Error: unable to connect to nodes [rabbit@root142]: nodedown

DIAGNOSTICS

===========

attempted to contact: [rabbit@root142]

rabbit@root142:

  * connected to epmd (port 4369) on root142

  * epmd reports node 'rabbit' running on port 25672

  * TCP connection succeeded but Erlang distribution failed

  * suggestion: hostname mismatch?

  * suggestion: is the cookie set correctly?

  * suggestion: is the Erlang distribution using TLS?

current node details:

- node name: 'rabbitmq-cli-87@root143'

- home dir: /var/lib/rabbitmq

- cookie hash: UauY91WLHa5kgyLLncHjSQ==