执行rabbitmq-plugins enable rabbitmq_management报错如下 Plugin configuration unchanged. Applying plugin configuration to rabbit@hj... failed. Could not contact node rabbit@hj. Changes will take effect at broker restart. Options: --online - fail if broker cannot be contacted. --offline - do not try to contact broker. 最后是版本不和的问题 因为我是编译安装的，然后用yum 安装就好了
