MySQL5.0,localhost-relay-bin 被误删除后，主从无法建立关系

问题背景

localhost-relay-bin 被误删除前主从是正常运行的，误删后尝试从新建立连接，但一直出现问题。

###问题还原

mysql> reset slave;
mysql> CHANGE MASTER TO MASTER_HOST='192.168.1.2',
    -> MASTER_PORT=3306,
    -> MASTER_USER='root',
    -> MASTER_PASSWORD='passwd',
    -> MASTER_LOG_FILE='mysql-bin.000632',
    -> MASTER_LOG_POS=194870462;
ERROR 2006 (HY000): MySQL server has gone away
No connection. Trying to reconnect...
Connection id:    706
Current database: *** NONE ***

ERROR 1201 (HY000): Could not initialize master info structure; more error messages can be found in the MySQL error log

mysql 错误日志

161011 22:27:24 [ERROR] log ./localhost-relay-bin.000007 listed in the index, but failed to stat
161011 22:27:24 [ERROR] Error counting relay log space

排查过

• 权限验证过没有问题
• 尝试删除 master.info ， relay-log.info 文件，然后重启 mysql,从新 reset slave,问题依旧
• my.cnf 检查过。确认没问题，因为其他服务器一致，并且以前正常运行过。