1、MySQL從庫 Failed to open the relay log

在配置MySQL主從復制的過程中，遇到了一個問題，提示：Could not initialize master info structure; more error messages can be found in the MySQL error log。

打開log日志發現是因為如下的原因：

111121 15:15:22 [ERROR] Failed to open the relay log ‘./dong-relay-bin.000002’ (relay_log_pos 1067) 111121 15:15:22 [ERROR] Could not find target log during relay log initialization

可以按照下面的方法解決：

在mysql日志目錄下刪除所有的relay logs，包括hostname-relay-bin.XXX, hostname-relay-bin.index and relay-log.info等等

重啟mysql服務

?2、MySQL從庫報錯log

171103 9:55:49 [Note] Slave I/O thread: Failed reading log event, reconnecting to retry, log 'mysql-bin.000268' at postion 141228974 171103 9:55:49 [Note] Slave: received end packet from server, apparent master shutdown: 171103 9:55:49 [Note] Slave I/O thread: Failed reading log event, reconnecting to retry, log 'mysql-bin.000268' at postion 141228974 171103 9:55:49 [Note] Slave: received end packet from server, apparent master shutdown: 171103 9:55:49 [Note] Slave I/O thread: Failed reading log event, reconnecting to retry, log 'mysql-bin.000268' at postion 141228974

原因：my.cnf里server-id與master或其他slave里的server-id沖突（注意MySQL可能讀取了多個配置文件）

解決方案：

修改my.cnf里server-id使其都相同

轉載于:https://www.cnblogs.com/jadexia/p/7717192.html

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