centos 7 启动mysql时报错Job for mariadb.service failed because the control process exited with error code. See "systemctl status mariadb.service" and "journalctl -xe" for details.

输入systemctl status mariadb.service 报错 Job for mariadb.service failed because the control process exited with error code. See "systemctl status mariadb.service" and "journalctl -xe" for details.

解决办法：重启centos7 ，直接reboot命令重启服务器