解决mysql报错ERROR 1201 (HY000):Could not initialize master

在做mysql主从复制时遇到个ERROR 1201 (HY000): Could not initialize master info structure .出现这个问题的原因是之前曾做过主从复制！

解决方案是：

运行命令 stop slave;
成功执行后继续运行 reset slave;

然后重新设置主从复制。

具体过程如下：

mysql> change master to master_host='127.0.0.1', master_user='user', master_pass 
word='user', master_log_file='mysql-bin-000202', master_log_pos=553; 
ERROR 1201 (HY000): Could not initialize master info structure; more error messa 
ges can be found in the MySQL error log 
mysql> stop slave; 
Query OK, 0 rows affected, 1 warning (0.00 sec) 
 
mysql> reset slave; 
Query OK, 0 rows affected (0.00 sec) 
 
mysql> change master to master_host='127.0.0.1', master_user='user', master_pass 
word='user', master_log_file='mysql-bin-000202', master_log_pos=553; 
Query OK, 0 rows affected (0.11 sec)