MySQL無法啟動的解決辦法
MySQL無法啟動
在停止mysql之后，執(zhí)行了一些操作（如修改主機名），重新啟動 mysql，發(fā)現(xiàn)起不來。
[root@www ~]$ service mysql start
Starting MySQL..^[[A.................................................................................................. ERROR! The server quit without updating PID file (/disk/mysql/www.pid).
[root@www ~]$ service mysql stop
ERROR! MySQL server PID file could not be found!
[root@www ~]$ service mysql stop
ERROR! MySQL server PID file could not be found!
[root@www ~]$ service mysql start
Starting MySQL..................
還是老樣子，只好 Ctr+C 掉。
[root@www ~]$
實在是啟動不了，看一下日志：/disk/mysql/www.err
120608 09:56:17 mysqld_safe Starting mysqld daemon with databases from /disk/mysql
120608 9:56:17 [Note] Plugin 'FEDERATED' is disabled.
120608 9:56:17 InnoDB: The InnoDB memory heap is disabled
120608 9:56:17 InnoDB: Mutexes and rw_locks use InnoDB's own implementation
120608 9:56:17 InnoDB: Compressed tables use zlib 1.2.3
120608 9:56:17 InnoDB: Using Linux native AIO
120608 9:56:17 InnoDB: Initializing buffer pool, size = 128.0M
120608 9:56:17 InnoDB: Completed initialization of buffer pool
InnoDB: Unable to lock ./ibdata1, error: 11
InnoDB: Check that you do not already have another mysqld process
InnoDB: using the same InnoDB data or log files.
120608 9:56:17 InnoDB: Retrying to lock the first data file
InnoDB: Unable to lock ./ibdata1, error: 11
InnoDB: Check that you do not already have another mysqld process
InnoDB: using the same InnoDB data or log files.
InnoDB: Unable to lock ./ibdata1, error: 11
InnoDB: Check that you do not already have another mysqld process
InnoDB: using the same InnoDB data or log files.
InnoDB: Unable to lock ./ibdata1, error: 11
...
好像是原來的 mysqld 并沒有停下來。
強制終止 mysqld
[root@www ~]$ ps -ef|grep mysql
root 4769 1 0 Jun06 ? 00:00:00 /bin/sh /usr/bin/mysqld_safe --datadir=/disk/mysql --pid-file=/disk/mysql/localhost.pid
mysql 4874 4769 0 Jun06 ? 00:04:04 /usr/sbin/mysqld --basedir=/usr --datadir=/disk/mysql --plugin-dir=/usr/lib/mysql/plugin --user=mysql --log-error=/disk/mysql/localhost.err --pid-file=/disk/mysql/localhost.pid --socket=/disk/mysql/mysql.sock
root 17947 1 0 09:56 pts/1 00:00:00 /bin/sh /usr/bin/mysqld_safe --datadir=/disk/mysql --pid-file=/disk/mysql/www.pid
mysql 18052 17947 0 09:56 pts/1 00:00:00 /usr/sbin/mysqld --basedir=/usr --datadir=/disk/mysql --plugin-dir=/usr/lib/mysql/plugin --user=mysql --log-error=/disk/mysql/www.err --pid-file=/disk/mysql/www.pid --socket=/disk/mysql/mysql.sock
root 18099 17514 0 09:56 pts/1 00:00:00 grep mysql
[root@www ~]$ killall mysqld
[root@www ~]$ killall mysqld
[root@www ~]$ ps -ef|grep mysql
root 18116 17514 0 09:57 pts/1 00:00:00 grep mysql
[root@www ~]$
啟動 mysqld ，現(xiàn)在執(zhí)行多次啟動命令都沒有問題。
[root@www ~]$ service mysql start
Starting MySQL. SUCCESS!
[root@www ~]$
[root@www ~]$
[root@www ~]$
[root@www ~]$
[root@www ~]$ service mysql start
Starting MySQL SUCCESS!
[root@www ~]$
前面 www.err 文件中顯示的 error: 11 到底是什么，看下：
[root@www ~]$ perror 11
OS error code 11: Resource temporarily unavailable
[root@www ~]$
[root@www ~]$
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