我正在尝试连接到 RabbitMQ 服务器，但总是收到以下错误：
W, [2015-12-08T15:38:01.993251 #37405] WARN -- #<Bunny::Session:0x7fe07b894f78 guest@localhost:5672, vhost=/dev_prod, addresses=[localhost:5672]>: An empty frame was received while opening the connection. In RabbitMQ <= 3.1 this could mean an authentication issue.
和
.../.rvm/gems/ruby-2.1.2/gems/bunny-2.2.0/lib/bunny/session.rb:315:in `rescue in start': Could not establish TCP connection to any of the configured hosts (Bunny::TCPConnectionFailedForAllHosts)
我在 MAC 操作系统上使用 Ruby 2.1.2、RabbitMQ 3.5.6。抱歉，我是 RabbitMQ 的新手，只是尝试使用它，但无法解决问题。请给我一些建议。