接口平台经常报server internal error（500）错误

查询日志，发现连接mysql报错，web页面显示server internal error（500）

解决方法：重启mysql服务器 

systemctl start mysqld

　　

#安装mysql
#下载mysql源安装包
wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm

#安装mysql源
yum localinstall mysql57-community-release-el7-8.noarch.rpm
yum install mysql-devel

#安装MySQL
yum install mysql-community-server

#启动MySQL服务
systemctl start mysqld

#查看MySQL的启动状态
systemctl status mysqld

#开机启动
systemctl enable mysqld