mysql启动报错汇总

今天在做关于xtrabackup的实验过程中mysql起不来了，经过检查发现是权限设置的问题。由此想到在日常的工作中会出现mysql启动不了的问题，这里建个帖子，把遇到的问题都收集过来，便于查阅。

1、        权限未进行配置

以下是日志信息：

150327 13:06:54mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data

150327 13:06:55[Note] Plugin 'FEDERATED' is disabled.

15032713:06:55  InnoDB: Started; log sequencenumber 0 343564

150327 13:06:55[ERROR] Event Scheduler: Failed to open table mysql.event

150327 13:06:55[ERROR] Event Scheduler: Error while loading from disk.

150327 13:06:55[Note] Event Scheduler: Purging the queue. 0 events

150327 13:06:55[ERROR] Aborting

 

15032713:06:55  InnoDB: Starting shutdown...

15032713:06:56  InnoDB: Shutdown completed; logsequence number 0 343564

150327 13:06:56[Note] /usr/local/mysql/bin/mysqld: Shutdown complete

解决方法：

chown mysql:mysql-R /usr/local/mysql/data

chmod 660 -R/usr/local/mysql/data