处理一则MySQL Slave环境出现ERROR 1201 (HY000): Could not initialize master info structure的案例。

120326 11:10:23 [ERROR] /usr/local/mysql//libexec/mysqld: File ‘/data/mysqldata/3306/binlog/mysql-relay-bin.000002‘ not found (Errcode: 2)
120326 11:10:23 [ERROR] Failed to open log (file ‘/data/mysqldata/3306/binlog/mysql-relay-bin.000002‘, errno 2)
120326 11:10:23 [ERROR] Failed to open the relay log ‘/data/mysqldata/3306/binlog/mysql-relay-bin.000002‘ (relay_log_pos 126074557)
120326 11:10:23 [ERROR] Could not open log file
120326 11:10:23 [ERROR] Failed to initialize the master info structure

mysql> reset slave;
Query OK, 0 rows affected (0.01 sec)
 
mysql> change master to 
    -> master_host=‘10.0.0.101‘,
    -> master_port=3306,
    -> master_user=‘repl‘,
    -> master_password=‘repl‘,
    -> master_log_file=‘mysql-bin.000011‘,
    -> master_log_pos=1;

mysql> change master to 
    -> master_host=‘10.0.0.101‘,
    -> master_port=3306,
    -> master_user=‘repl‘,
    -> master_password=‘repl‘,
    -> master_log_file=‘mysql-bin.000011‘,
    -> master_log_pos=1;
ERROR 1201 (HY000): Could not initialize master info structure; more error messages can be found in the MySQL error log

120326 11:14:27 [ERROR] Error reading master configuration
在操作系统端查看master/slave的配置文件，发现是两个0字节文件：
-rw-rw---- 1 mysql mysql     0 Mar 26 11:13 master.info
-rw-rw---- 1 mysql mysql     0 Mar 26 11:13 relay-log.info

mysql> change master to 
    -> master_host=‘10.0.0.101‘,
    -> master_port=3306,
    -> master_user=‘repl‘,
    -> master_password=‘repl‘,
    -> master_log_file=‘mysql-bin.000011‘,
    -> master_log_pos=1;
Query OK, 0 rows affected (0.00 sec)

mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
 
mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 10.0.0.101
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000011
          Read_Master_Log_Pos: 101