linux mysql突然无法启动

[稻庄]

[root@iZ25wt7dp4pZ /]# service mysql start
Starting MySQL.The server quit without updating PID file (/[FAILED]mysql/iZ25wt7dp4pZ.pid).



mysql报错日志有：
170214 14:58:04 mysqld_safe mysqld from pid file /var/lib/mysql/iZ25wt7dp4pZ.pid ended


跟踪一天了，网上的解决方法都试了，就是不行，求救大侠