mysql重装出错InnoDB: Unable to lock ./ibdata1, error: 11

Centos6.2系统自带的Mysql版本较低，卸载掉再重装一个最新的。

下载并安装以下包

        MySQL-client-5.5.25-1.el6.i686.rpm
        MySQL-devel-5.5.25-1.el6.i686.rpm(含mysql_config)
        MySQL-server-5.5.25-1.el6.i686.rpm
        MySQL-shared-5.5.25-1.el6.i686.rpm
        MySQL-shared-compat-5.5.25-1.el6.i686.rpm

安装成功后

启动mysql，使用

#service mysql start

显示Starting MySQL SUCCESS!
使用ps命令查看进程情况

#ps -ef | grep mysqlroot      2853     1  0 09:03 ?        00:00:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --pid-file=/var/lib/mysql/python.centos.pidmysql     3105  2853  0 09:03 ?        00:00:00 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib/mysql/plugin --user=mysql--log-error=/var/lib/mysql/python.centos.err --pid-file=/var/lib/mysql/python.centos.pid --socket=/var/lib/mysql/mysql.sock --port=3306root      4163     1  0 09:17 pts/0    00:00:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --pid-file=/var/lib/mysql/python.centos.pidmysql     4416  4163  1 09:17 pts/0    00:00:00 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib/mysql/plugin --user=mysql --log-error=/var/lib/mysql/python.centos.err --pid-file=/var/lib/mysql/python.centos.pid --socket=/var/lib/mysql/mysql.sock --port=3306

mysql写错误日志，python.centos是我的机器名。两个时间，可能是我运行了两次。

从shell进入mysql

# mysqlERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

结束mysql服务

#service mysql stopERROR! MySQL server PID file could not be found!

查看/var/lib/mysql/python.centos.err错误日志

120706 09:17:59 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql120706  9:17:59 [Note] Plugin 'FEDERATED' is disabled.120706  9:17:59 InnoDB: The InnoDB memory heap is disabled120706  9:17:59 InnoDB: Mutexes and rw_locks use GCC atomic builtins120706  9:17:59 InnoDB: Compressed tables use zlib 1.2.3120706  9:17:59 InnoDB: Using Linux native AIO120706  9:17:59 InnoDB: Initializing buffer pool, size = 128.0M120706  9:17:59 InnoDB: Completed initialization of buffer poolInnoDB: Unable to lock ./ibdata1, error: 11InnoDB: Check that you do not already have another mysqld processInnoDB: using the same InnoDB data or log files.120706  9:17:59  InnoDB: Retrying to lock the first data fileInnoDB: Unable to lock ./ibdata1, error: 11InnoDB: Check that you do not already have another mysqld process

... ... ... ... ... ... ...

InnoDB: Check that you do not already have another mysqld processInnoDB: using the same InnoDB data or log files.InnoDB: Unable to lock ./ibdata1, error: 11InnoDB: Check that you do not already have another mysqld processInnoDB: using the same InnoDB data or log files.120706  9:19:40  InnoDB: Unable to open the first data fileInnoDB: Error in opening ./ibdata1120706  9:19:40  InnoDB: Operating system error number 11 in a file operation.InnoDB: Error number 11 means 'Resource temporarily unavailable'.InnoDB: Some operating system error numbers are described atInnoDB: http://dev.mysql.com/doc/refman/5.5/en/operating-system-error-codes.html120706  9:19:40 InnoDB: Could not open or create data files.120706  9:19:40 InnoDB: If you tried to add new data files, and it failed here,120706  9:19:40 InnoDB: you should now edit innodb_data_file_path in my.cnf back120706  9:19:40 InnoDB: to what it was, and remove the new ibdata files InnoDB created120706  9:19:40 InnoDB: in this failed attempt. InnoDB only wrote those files full of120706  9:19:40 InnoDB: zeros, but did not yet use them in any way. But be careful: do not120706  9:19:40 InnoDB: remove old data files which contain your precious data!120706  9:19:40 [ERROR] Plugin 'InnoDB' init function returned error.120706  9:19:40 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.120706  9:19:40 [ERROR] Unknown/unsupported storage engine: InnoDB120706  9:19:40 [ERROR] Aborting120706  9:19:40 [Note] /usr/sbin/mysqld: Shutdown complete120706 09:19:40 mysqld_safe mysqld from pid file /var/lib/mysql/python.centos.pid ended

查找InnoDB: Unable to lock ./ibdata1, error: 11的解决方法

http://cglreport.zhenhua.info/2008/08/mysql-error-unable-to-lock-ibdata1.html

Solution：

make a copy of the original files (ibdata1, ib_logfile0, ib_logfile1...).

mv ibdata1 ibdata1.bak

cp -a ibdata1.bak ibdata1

......

操作：

先查看/var/lib/mysql目录下的文件

# cd /var/lib/mysql/# lltotal 28812-rw-rwxr-x. 1 mysql mysql 18874368 Jul  4 17:30 ibdata1-rw-rwxr-x. 1 mysql mysql  5242880 Jul  6 09:03 ib_logfile0-rw-rwxr-x. 1 mysql mysql  5242880 Jun 14 15:48 ib_logfile1drwxr-xr-x. 2 mysql mysql     4096 Jun 14 14:39 mysql-rw-rw----. 1 mysql mysql      107 Jul  6 09:03 mysql-bin.000001-rw-rwxr-x. 1 mysql mysql       19 Jul  6 09:03 mysql-bin.indexdrwxr-xr-x. 2 mysql mysql     4096 Jun 14 14:39 performance_schema-rw-rwxr-x. 1 mysql root    108068 Jul  6 09:19 python.centos.err-rw-r-xr-x. 1 root  root       329 Jun 14 15:47 RPM_UPGRADE_HISTORY-rw-r-xr-x. 1 mysql mysql      329 Jun 14 15:47 RPM_UPGRADE_MARKER-LAST-rw-r-xr-x. 1 root  root         0 Jul  5 16:56 -Sdrwxr-xr-x. 2 mysql mysql     4096 Jun 14 16:06 test

上面三个文件ibdata1、ib_logfile0、ib_logfile1都是属于mysql用户的。

切换到mysql用户再进行操作

# su mysqlbash-4.1$ pwd/var/lib/mysql

确认当前在/var/lib/mysql目录下，执行

bash-4.1$ mv ibdata1 ibdata1.bakbash-4.1$ cp -a ibdata1.bak ibdata1bash-4.1$ mv ib_logfile0 ib_logfile0.bakbash-4.1$ cp -a ib_logfile0.bak ib_logfile0bash-4.1$ mv ib_logfile1 ib_logfile1.bakbash-4.1$ cp -a ib_logfile1.bak ib_logfile1bash-4.1$ exit

退出mysql用户，使用lsof查找mysql进程并杀掉，重启mysql服务

# lsof -i:3306COMMAND  PID  USER   FD   TYPE DEVICE SIZE/OFF NODE NAMEmysqld  3105 mysql   11u  IPv4  15743      0t0  TCP *:mysql (LISTEN)# kill -9 3105# service mysql startStarting MySQL.. SUCCESS!

进入mysql

# mysqlWelcome to the MySQL monitor.  Commands end with ; or \g.Your MySQL connection id is 1Server version: 5.5.25-log MySQL Community Server (GPL)Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> show databases;+--------------------+| Database           |+--------------------+| information_schema || mysql              || performance_schema || test               |+--------------------+4 rows in set (0.10 sec)

将mysql添加到自动启动

/sbin/chkconfig --level 35 mysql on

成功解决。对于错误ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)的讨论：

http://www.iteye.com/topic/149100

http://cglreport.zhenhua.info/2008/08/mysql-error-unable-to-lock-ibdata1.html