故障现象:
当我们重新启动mysql服务时出现以下报错
[root@cong1 lib]# service mysqld restart ##重启
ERROR! MySQL server PID file could not be found! ##报错
解决方法:
进程占用,查看mysql进程,将显示出来的进程kill掉即可
[root@cong1 lib]# ps aux |grep mysq* ##查看进程
root 19554 0.0 0.0 11688 1564 pts/0 S 07:44 0:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/home/mysql --pid-file=/home/mysql/localhost.localdomain.pid
mysql 19669 0.0 23.8 1036364 445160 pts/0 Sl 07:44 0:04 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/home/mysql --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/home/mysql/localhost.localdomain.err --pid-file=/home/mysql/localhost.localdomain.pid
root 23735 0.0 0.0 112728 976 pts/0 R+ 09:44 0:00 grep --color=auto mysq*
[root@cong1 lib]# kill 19554
[root@cong1 lib]# kill 19669
[root@cong1 lib]# kill 23753
bash: kill: (23753) - 没有那个进程
[root@cong1 lib]# service mysqld restart
ERROR! MySQL server PID file could not be found!
Starting MySQL.. SUCCESS! ###成功