ERROR: epmd error for host YOUR_HOSTNAME: timeout (timed out)的解决方案

现象：

Warning: PID file not written; -detached was passed.
ERROR: epmd error for host abcdefg: timeout (timed out)
原因：

其实RabbitMQ报这个错的原因是无法在/etc/hosts中正确识别主机名，因此只需修改该文件即可

解决办法：

vim /etc/hosts

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