mysql故障~Got fatal error 1236 解决方法

it2022-05-05  237

8月12日晚8点40: 碰到了1.30 3306服务器宕机的问题: 分析原因:是sdb的硬盘出现了问题(根据fdisk -l 查看原因情况),加之挂载的是mysql的数据目录,导致1.30 3306的宕机 系统层面的故障解决方法:重启操作系统,插拔了sdb的对应的硬盘。 数据层面的操作:重启1.30 3306和3307数据库。                 查看1.30 3307与3306的同步问题(操作方式:show master status,show slave status)                                  继续查看1.31的3306和3307的同步问题。发现同步出现问题(Got fatal error 1236 from master when reading data from binary log)                 查看从库状态:                  mysql> show slave status\G; *************************** 1. row ***************************                Slave_IO_State:                   Master_Host: 192.168.1.31                   Master_User: repl                   Master_Port: 3306                 Connect_Retry: 60               Master_Log_File: forummysql01-bin.004799           Read_Master_Log_Pos: 73959657                Relay_Log_File: mysql-relay-bin.001687                 Relay_Log_Pos: 73959809                 Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: 'Client requested master to start replication from impossible position'                Last_SQL_Errno: 0                Last_SQL_Error: 1 row in set (0.00 sec) ERROR: No query specified 发现从库读了一个不可预知的pos的日志。 再次,回到主库查看主库的binlog: mysql> show master status\G; *************************** 1. row ***************************             File: forummysql01-bin.004800         Position: 29732172     Binlog_Do_DB: Binlog_Ignore_DB: 1 row in set (0.00 sec) ERROR: No query specified 分析forummysql01-bin.004799的binlog。(mysqlbinlog ./forummysql01-bin.004799 >/root/bin_004799.log) 发现binlog里面的位置,出现偏移,bin.004799 里面没有pos 73959657位置的日志 回到从库,同时修改两台从库binlog的位置。 stop slave; CHANGE MASTER TO MASTER_HOST = '192.168.1.31',MASTER_PORT = 3306,MASTER_LOG_FILE = 'forummysql01-bin.004799',MASTER_LOG_POS = 73880572; start slave; 在查看slave的状态:show slave status\G; 发现还有一个错误: *************************** 1. row ***************************                Slave_IO_State: Waiting for master to send event                   Master_Host: 192.168.1.31                   Master_User: repl                   Master_Port: 3306                 Connect_Retry: 60               Master_Log_File: forummysql01-bin.004800           Read_Master_Log_Pos: 32884198                Relay_Log_File: mysql-relay-bin.000002                 Relay_Log_Pos: 16724         Relay_Master_Log_File: forummysql01-bin.004800              Slave_IO_Running: Yes             Slave_SQL_Running: No                    Last_Error: Error 'Duplicate entry '663961' for key 'PRIMARY'' on query. Default database: 'kaiyuan'. Query: 'insert into  wiki_download(download_name,download_ip,download_refer,download_time) values ('HDWiki-v5.1GBK-20120509.zip','192.168.1.41','','2012-08-12 21:36:25')'                 再次执行skip操作: stop slave; set global sql_slave_skip_counter =1 ; start slave; 之后,就一切正常。

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