1.下面是搭建mysql主从的时候报的错：
mysql> CHANGE MASTER TO MASTER_HOST='192.168.20.214',MASTER_USER='repl',MASTER_PASSWORD='whaty123';
ERROR 1201 (HY000): Could not initialize master info structure; more error messages can be found in the MySQL error log
这个错误就是删除data目录的master.info文件