如题，项目通过镜像迁移到另一个服务器后，开启项目，无法链接本机Mysql，但是用开发电脑通过外网IP链接是可以的

查看日志 抛出下面两个异常

Unable to set localhost. This prevents creation of a GUID. Cause was iZj6cemhzvwh37aspfpazgZ

2017-12-08 11:41:15 [ERROR] - com.alibaba.druid.pool.DruidDataSource -Log4j2Impl.java(53) -create connection error, url: jdbc:mysql://127.0.0.1:3306/xytour?useUnicode=true&characterEncoding=utf-8, errorCode 0, state 08S01com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failureThe last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

意思就是系统不知道"iZj6cemhzvwh37aspfpazgZ" 是什么东西、 无法链接mysql

想了一下这"iZj6cemhzvwh37aspfpazgZ" 很像阿里云的主机命名格式，看了一下果然是旧服务器的名字，然后想到外网能连mysql，本机不能连？肯定是host的问题。。

编辑 /etc/hosts

127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 {你的主机名}::1         localhost localhost.localdomain localhost6 localhost6.localdomain6{主机的内网IP}  {你的主机名}

重启项目，搞定