mysql故障（程序正在运行却找不到PID文件）

[root@slave ~]# /etc/init.d/mysql status
ERROR! MySQL is running but PID file could not be found

[root@slave ~]# ps aux|grep mysql
root         0.1  0.2    ?        S    :   : /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/mysql/data --pid-file=/mysql/data/slave.pid
root        0.0  0.1     pts/    S+   :   : grep mysql
root        0.0  0.1     ?        S    :   : /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/mysql/data --pid-file=/mysql/data/slave.pid
root        0.0  0.1     ?        S    :   : grep /usr/local/mysql/bin/mysqld\>
root        0.0  0.1     ?        S    :   : grep -c pid-file=/mysql/data/slave.pid
[root@slave ~]# kill  - 1145

[root@slave ~]# /etc/init.d/mysql restart
ERROR! MySQL server process #11890 is not running!
Starting MySQL... SUCCESS!
[root@slave ~]# /etc/init.d/mysql status
SUCCESS! MySQL running (12312)