mysql5.7啓動slave報錯 ERROR 1872 (HY000): Slave failed to initialize relay log info structure from the r

緣由：檢查my.cnf，原來沒指定relay_log，mysql默認產生的relay_log名被該server上的另外一個mysql slave佔用了。

解決方法：
1.在my.cnf中添加

relay_log = /usr/local/mysql/log/relay.log

2. reset slave

mysql> reset slave;

mysql> change master  to
    -> master_host='192.168.0.11',
    -> master_user='rep',
    -> master_password='VkNI%5%-p,0^)s~';
Query OK, 0 rows affected, 2 warnings (0.19 sec)


mysql> start slave;
Query OK, 0 rows affected (0.03 sec)

mysql> show slave status\G;