mysql中其中2台从服务器不正常关闭导致，实例启动不起来问题解决

对于主从配置和启动网上可以看到大篇的案例和讲解，这里我遇到了几个棘手的问题，就是2台从服务器无法正常启动，实例起不来，原因是有人在晚上做服务器关闭的时候没有先关闭mysql服务，在关闭服务器，到时第二天无法启动！问题转接到我这里看了，仔细看错误日志，变可以看出端倪，以下是错误信息；

[root@CloneSlave01 data]# tail -100 CloneSlave01.err

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

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

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

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

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

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

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

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

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

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

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

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

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

InnoDB: Check that you do not already have another mysqld process

InnoDB: using the same InnoDB data or log files.

121211 10:03:27 InnoDB: Unable to open the first data file

InnoDB: Error in opening ./ibdata1

121211 10:03:27 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 at

InnoDB: http://dev.mysql.com/doc/refman/5.5/en/operating-system-error-codes.html
121211 10:03:27 InnoDB: Could not open or create data files.

121211 10:03:27 InnoDB: If you tried to add new data files, and it failed here,

121211 10:03:27 InnoDB: you should now edit innodb_data_file_path in my.cnf back

121211 10:03:27 InnoDB: to what it was, and remove the new ibdata files InnoDB created

121211 10:03:27 InnoDB: in this failed attempt. InnoDB only wrote those files full of

121211 10:03:27 InnoDB: zeros, but did not yet use them in any way. But be careful: do not

121211 10:03:27 InnoDB: remove old data files which contain your precious data!

121211 10:03:27 [ERROR] Plugin 'InnoDB' init function returned error.

121211 10:03:27 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.

121211 10:03:27 [ERROR] Unknown/unsupported storage engine: innodb

121211 10:03:27 [ERROR] Aborting

121211 10:03:27 [Note] /usr/local/mysql/bin/mysqld: Shutdown complete

121211 10:03:27 mysqld_safe mysqld from pid file /usr/local/mysql/data/CloneSlave01.pid ended

以上的问题，需要剔除ibdata 以及ib_logfile0、ib_logfile1这3个文件便可以正常启动

121211 10:17:37 InnoDB: Completed initialization of buffer pool

InnoDB: The first specified data file ./ibdata1 did not exist:

InnoDB: a new database to be created!

121211 10:17:37 InnoDB: Setting file ./ibdata1 size to 10 MB

InnoDB: Database physically writes the file full: wait...

121211 10:17:37 InnoDB: Log file ./ib_logfile0 did not exist: new to be created

InnoDB: Setting log file ./ib_logfile0 size to 5 MB

InnoDB: Database physically writes the file full: wait...

121211 10:17:38 InnoDB: Log file ./ib_logfile1 did not exist: new to be created

InnoDB: Setting log file ./ib_logfile1 size to 5 MB

InnoDB: Database physically writes the file full: wait...

InnoDB: Doublewrite buffer not found: creating new

InnoDB: Doublewrite buffer created

InnoDB: 127 rollback segment(s) active.

InnoDB: Creating foreign key constraint system tables

InnoDB: Foreign key constraint system tables created

121211 10:17:38 InnoDB: Waiting for the background threads to start

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.

121211 10:17:39 InnoDB: 1.1.7 started; log sequence number 0

121211 10:17:39 [ERROR] Can't start server: Bind on TCP/IP port: Address already in use

121211 10:17:39 [ERROR] Do you already have another mysqld server running on port: 3306 ?

121211 10:17:39 [ERROR] Aborting

121211 10:17:39 InnoDB: Starting shutdown...

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

再次启动的时候可以看出有端口占用了3306导致无法启动，由于这是测试无关紧要，就没做端口变更；下面进行查看；

[root@CloneSlave01 data]# netstat -tpln |grep 3306

tcp 0 0 :::3306 :::* LISTEN 3237/mysqld

[root@CloneSlave01 data]# kill 3237

[root@CloneSlave01 data]# netstat -tpln |grep 3306

[root@CloneSlave01 data]# service mysqld restart

MySQL server PID file could not be found! [FAILED]

Starting MySQL.. [ OK ]

[root@CloneSlave01 data]# service mysqld restart

Shutting down MySQL. [ OK ]

Starting MySQL.. [ OK ]

[root@CloneSlave01 data]#

我们提出3306的占用端口，即可重新启动，看上面的效果，另一台的操作方法和步骤和以上大同小异，我就不再次贴出来，当然启动好以后还要测试相关的数据完整性等问题！

总结：我们在关闭服务器的时候，一定要了解服务器的有哪些服务，需要我们提前做好关闭的，才能保证我们数据的安全可靠。