今天QQ上朋友突然说网站打不开了，远程连接异常，紧接着阿里云的vps貌似重启了，重启了之后mysql无法启动了，查看mysql错误日志内容如下：
22:50:08 2268 [Note] Plugin 'FEDERATED' is disabled.
22:50:08 9f8 Warning: Using innodb_additional_mem_pool_size is DEPRECATED. This option may be removed in future
releases, together with the option innodb_use_sys_malloc and with the InnoDB's internal memory allocator.
22:50:08 2268 [Note] The InnoDB memory heap is disabled
22:50:08 2268 [Note] Mutexes and rw_locks use Windows interlocked functions
22:50:08 2268 [Note] Compressed tables use zlib 1.2.3
22:50:08 2268 [Note] Not using CPU crc32 instructions
22:50:08 2268 [Note] Initializing buffer pool, size = 16.0M
22:50:08 2268 [Note] Completed initialization of buffer pool
22:50:08 2268 [Note] Highest supported file format is Barracuda.
22:50:08 2268 [Note] The log sequence numbers 0 and 0 in ibdata files do not match the log sequence number 1600614
in the ib_logfiles!
22:50:08 2268 [Note] Database was not shutdown normally!
22:50:08 2268 [Note] Starting crash recovery.
22:50:08 2268 [Note] Reading tablespace information from the .ibd files...
22:50:08 2268 [ERROR] Attempted to open a previously opened tablespace. Previous tablespace 5zhe_youxi/core_auth
赶紧到网上查看解决方案：
在D:\xampp\mysql\bin下面的my.ini中添加
innodb_force_recovery = 1
果然可以启动mysql了不过部分表还是读取不了,使用repair table命令修复还是失败了，虽然工作了将近一年还没有遇到这种情况，不过以后确实要提高安全意识了。