遇到的问题：The driver has not received any packets from the server
今天新拉了一个项目，点击是碰到数据库的错误，
Communications link failure
The driver has not received any packets from the server.
花了我接近一天的时间，特写一篇博客纪念一下，防止下次再犯这种弱智错误
最先开始是觉得代码有问题
连续检查了好几遍都没有发现什么错
到网上查
很多人都说
修改MySQL的参数，wait_timeout最大为31536000即1年，在my.cnf中加入：
[mysqld]
wait_timeout=31536000
interactive_timeout=31536000
但是我的数据库明显不是这个错误，一查，果然有两个模块，我只改了一个模块的数据库地址，完事我把两个地址一改，您猜怎么着，通了。
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