CentOS 7下MySQL服务启动失败该怎么解决

Question

报错如下，该怎么解决[root@spark01 ~]# /etc/init.d/mysqld startStarting mysqld (via systemctl):  Job for mysqld.service failed because the control process exited with error code. See "systemctl status mysqld.service" and "journalctl -xe" for details.                                                           [FAILED]