启动Mysql时发生的一个关于PID文件错误问题

今天启动mysql时出现了如下错误：

[[email protected] /]# service mysql start
Starting MySQL.. ERROR! The server quit without updating PID file (/var/lib/mysql/host1.pid).

查看错误日志：

[[email protected] /]# cat /var/log/mysqld.err | less
2015-07-26 11:09:55 3463 [ERROR] MYSQL_BIN_LOG::open_purge_index_file failed to open register  file.
2015-07-26 11:09:55 3463 [ERROR] MYSQL_BIN_LOG::open_index_file failed to sync the index file.
2015-07-26 11:09:55 3463 [ERROR] Aborting

经排查，原因是文件权限在复制移动时被改动到了，属权限的问题，执行：

[[email protected] /]# chown -R mysql:mysql /var/lib/mysql/

[[email protected] /]# service mysql start
Starting MySQL.. SUCCESS!

问题成功解决。