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(三)
n 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。