ERROR 1286 (42000): Unknown table engine ‘InnoDB’

在对mysql库进行导出表结构时，发现报错：
mysqldump:Got Error: 1286: Unknown table engine 'InnoDB? when using LOCK TABLES

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mysql > show engines ; + -- -- -- -- -- -- + -- -- -- -- - + -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - + -- -- -- -- -- -- -- + -- -- -- + -- -- -- -- -- -- + | Engine      | Support | Comment                                      | Transactions | XA | Savepoints | + -- -- -- -- -- -- + -- -- -- -- - + -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - + -- -- -- -- -- -- -- + -- -- -- + -- -- -- -- -- -- + | MRG_MYISAM | YES      | Collection of identical MyISAM tables                        | NO | NO | NO | | CSV          | YES      | CSV storage engine                                          | NO | NO | NO | | FEDERATED    | NO        | Federated MySQL storage engine                                | NULL | NULL | NULL | | MyISAM      | DEFAULT | Default engine as of MySQL 3.23 with great performance | NO | NO | NO | | MEMORY      | YES      | Hash based , stored in memory , useful for temporary tables    | NO | NO | NO | + -- -- -- -- -- -- + -- -- -- -- - + -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - + -- -- -- -- -- -- -- + -- -- -- + -- -- -- -- -- -- + 5 rows in set ( 0.00 sec ) mysql > show innodb status ; ERROR 1286 ( 42000 ) : Unknown table engine 'InnoDB'

检查日志发现：

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140402 12 : 32 : 15 InnoDB : Initializing buffer pool , size = 1.5G 140402 12 : 32 : 15 InnoDB : Completed initialization of buffer pool InnoDB : Error : log file . / ib_logfile0 is of different size 0 5242880 bytes InnoDB : than specified in the .cnf file 0 268435456 bytes ! 140402 12 : 32 : 15 [ ERROR ] Plugin 'InnoDB' init function returned error . 140402 12 : 32 : 15 [ ERROR ] Plugin 'InnoDB' registration as a STORAGE ENGINE failed .

重启数据，将ib_logfile删除

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#/etc/init.d/mysqld stop #cd /var/lib/mysql #rm -rf ib_logfile* #/etc/init.d/mysqld start

 再次检查表引擎状态一切恢复正常。

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mysql > show engines; +------------+---------+--------------------------------------------------------------------------------------------+--------------+------+------------+ | Engine              | Support   | Comment                                                                           | Transactions | XA | Savepoints | +------------+---------+--------------------------------------------------------------------------------------------+--------------+------+------------+ | MRG_MYISAM | YES           | Collection of identical MyISAM tables                                     | NO | NO | NO | | CSV        | YES          | CSV storage engine                                                                    | NO | NO | NO | | FEDERATED  | NO           | Federated MySQL storage engine                                            | NULL | NULL | NULL | | InnoDB     | YES           | Supports transactions, row -level locking, and foreign keys | YES | YES | YES | | MEMORY     | YES           | Hash based, stored in memory, useful for temporary tables | NO | NO | NO | | MyISAM     | DEFAULT | Default engine as of MySQL 3.23 with great performance | NO | NO | NO | +------------+---------+------------------------------------------------------------+--------------+------+------------+ 6 rows in set (0.00 sec)   mysql > show innodb status\G; *************************** 1. row *************************** Type: InnoDB Name: Status: ===================================== 140402 13:51:30 INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 3 seconds ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 5, signal count 5 Mutex spin waits 0, rounds 40, OS waits 0 RW -shared spins 10, OS waits 5; RW -excl spins 0, OS waits 0 ...... ---------------------------- END OF INNODB MONITOR OUTPUT ============================

 

至此一切恢复正常