MySQL主從配置提示Failed to initialize the master info structure錯誤

MySQL主從配置可以實現數據熱備份了，今天我們來看在使用主從配置時碰到Failed to initialize the master info structure錯誤提示問題的解決辦法。

大清早收到一個MySQL的自定義語言告警 ：replication interrupt，看來是主從同步報錯了。
登陸MySQL，執行 show slave status \G 發現salve已經停止了，於是使用 start slave啟動，結果有如下報錯：

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

搜索了下，網上給出的解決辦法基本都是：

①、執行 reset slave；
②、重新執行 change master：

mysql> change master to
    -> master_host='192.168.1.100',
    -> master_port=3306,
    -> master_user='repl',
    -> master_password='repl',
    -> master_log_file='mysql-bin.000051',
    -> master_log_pos=254105;
③、執行 start slave

於是試了下，發現還是一樣的報錯，順著報錯信息，看了下error 日志：

160324  6:40:10 [ERROR] log *** glibc detected *** /data/mysql/bin/mysqld: corrupted double-linked list: 0x00002ab038100ab0 *** listed in the index, but failed to stat
160324  6:40:10 [ERROR] Error counting relay log space
160324  6:40:10 [ERROR] Failed to initialize the master info structure
160324  6:40:10 [Note] Event Scheduler: Loaded 0 events
160324  6:40:10 [Note] /data/mysql/bin/mysqld: ready for connections.
Version: '5.5.13-log'  socket: '/data/mysql/data/mysqld.sock'  port: 3306  Source distribution
160324  9:33:41 [ERROR] log *** glibc detected *** /data/mysql/bin/mysqld: corrupted double-linked list: 0x00002ab038100ab0 *** listed in the index, but failed to stat
160324  9:33:41 [ERROR] Error counting relay log space
160324  9:33:54 [ERROR] log *** glibc detected *** /data/mysql/bin/mysqld: corrupted double-linked list: 0x00002ab038100ab0 *** listed in the index, but failed to stat
160324  9:33:54 [ERROR] Error counting relay log space
160324  9:35:29 [ERROR] log *** glibc detected *** /data/mysql/bin/mysqld: corrupted double-linked list: 0x00002ab038100ab0 *** listed in the index, but failed to stat
160324  9:35:29 [ERROR] Error counting relay log space
160324  9:37:47 [ERROR] log *** glibc detected *** /data/mysql/bin/mysqld: corrupted double-linked list: 0x00002ab038100ab0 *** listed in the index, but failed to stat
160324  9:37:47 [ERROR] Error counting relay log space

發現其中頻繁出現如下錯誤：
 

ist: 0x00002ab038100ab0 *** listed in the index, but failed to stat

於是，把MySQL 數據文件目錄下的 index info 文件都看了一遍，結果發現 Centos64-relay-bin.index文件中出現異常內容：MySQL主從報錯解決：Failed to initialize the master info structure

這個文件正常情況應該是記錄了 bin-log文件名稱才對，比如：
 

./Centos64-relay-bin.002064
./Centos64-relay-bin.002065
./Centos64-relay-bin.002066
./Centos64-relay-bin.002067
./Centos64-relay-bin.002068
./Centos64-relay-bin.002069
./Centos64-relay-bin.002070

因此，將 Centos64-relay-bin.index 這個文件mv 重命名，然後重啟MySQL，重新按照上文從網上照來的的步驟：reset、change master、start 成功搞定！
如果你也遇到類似問題，可以先按照網上提供的三個步驟試試，如果還是和本文類似的報錯，請特別看下MySQL數據目錄下的這幾種文件：
mysql-bin.index
relay-log.info
主機名-relay-bin.index
可以嘗試將他們重命名或移走，重啟MySQL再走一遍上面的三個步驟應該可以搞定了！