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

 

mysql> start slave;
ERROR 1872 (HY000): Slave failed to initialize relay log info structure from the repository

 

处理一则MySQL Slave环境出现ERROR 1201 (HY000): Could not initialize master info structure的案例。
 
冷备份方式复制一份新的slave,初始化参数中已经修改了相关文件路径及server_id等关联参数。
但在启动slave时发现error_log中出现下列错误信息:
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

 

 
由于新的slave改变了服务端口和文件路径,分析应该是由于mysql-relay-bin.index中仍然保存着旧relay日志文件的路径,而这些路径下又找不到合适的文件,因此报错。
 
对于这类问题解决起来是比较简单的,重置slave的参照即可,执行命令如下:
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;

 

ERROR 29 (HY000): File '/data/mysqldata/3306/binlog/mysql-relay-bin.000001' not found (Errcode: 2)
看来应该还是mysql-relay-bin.index的问题,删除该文件及关联的relay-bin文件。再次配置master:
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

 

 
出现了新的错误,按照提示查看error_log也没发现更多错误信息,error_log中只是显示一条:
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

 

会不会是这个原因呢,直接删除这两个文件,然后尝试重新执行change master:
 
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)

 

 
成功,启动slave并查看状态:
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

 

...........
 
故障解决。
 
转自: http://blog.itpub.net/7607759/viewspace-719707/
posted @ 2014-10-22 05:51  mjorcen  阅读(8848)  评论(0编辑  收藏