my26_Slave failed to initialize relay log info structure from the repository

重啓了一下從庫，忘記先stop slave ，直接mysqladmin shutdown關閉實例，結果起不來了

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

這個錯誤就是relay log有問題，但我看本身的配置中有配置relay_log參數，但爲何從庫啓動會在此處出問題呢

從新開啓同步，先記下當前從庫同步的位置

mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: 
                  Master_Host: 10.*.*.*
                  Master_User: db_slave
                  Master_Port: 3301
                Connect_Retry: 60
              Master_Log_File: mysql-bin.013463
          Read_Master_Log_Pos: 247058609

 

reset master;
reset slave all;

mysql> CHANGE MASTER TO
-> MASTER_HOST='10.***',
-> MASTER_USER='db_slave',
-> MASTER_PASSWORD='***********',
-> MASTER_PORT=3301,
-> MASTER_LOG_FILE='mysql-bin.013463',
-> MASTER_LOG_POS=247058609,
-> MASTER_CONNECT_RETRY=10;
ERROR 29 (HY000): File '/data/mysql_3301/var/mysql-relay-bin.000001' not found (Errcode: 2 - No such file or directory)

結果仍是報錯，仍是關於relay log的，而後

修改配置文件，新建一個目錄，從新爲relay log指定一個目錄，再也不使用原來的目錄

relay_log                      = /data/mysql_3301/log/mysql-relay-bin

 再次CHANGE MASTER TO……，start slave，此次從庫成功啓動了