MySQL主从失败错误：Got fatal error 12362014-10-22同事给我打电话说团购数据库主从不同步了，速度开电脑拨VPN解决。1、登录从库查看主从同步状态，确实是否不同步
mysql> show slave statusG*************************** 1. row ***************************Slave_IO_State:Master_Host: 10.10.0.236Master_User: slaveMaster_Port: 3306Connect_Retry: 60Master_Log_File: mysql-bin.001501Read_Master_Log_Pos: 144001931Relay_Log_File: mysql-relay-bin.000296Relay_Log_Pos: 144002077Relay_Master_Log_File: mysql-bin.001501Slave_IO_Running: NoSlave_SQL_Running: YesReplicate_Do_DB:Replicate_Ignore_DB: mysql,information_schema,performance_schema,testReplicate_Do_Table:Replicate_Ignore_Table:Replicate_Wild_Do_Table:Replicate_Wild_Ignore_Table:Last_Errno: 0Last_Error:Skip_Counter: 0Exec_Master_Log_Pos: 144001931Relay_Log_Space: 144002276Until_Condition: NoneUntil_Log_File:Until_Log_Pos: 0Master_SSL_Allowed: NoMaster_SSL_CA_File:Master_SSL_CA_Path:Master_SSL_Cert:Master_SSL_Cipher:Master_SSL_Key:Seconds_Behind_Master: NULLMaster_SSL_Verify_Server_Cert: NoLast_IO_Errno: 1236Last_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: 0Last_SQL_Error:Replicate_Ignore_Server_Ids:Master_Server_Id: 21 row in set （0.00 sec）
看来确实出问题了，查看从库错误日志：
[root@tg_0_zjc tuan]# tail -n 30 logs/mysqld.log130619 22:23:36 [Note] Slave SQL thread initialized, starting replication in log "mysql-bin.001343" at position 107, relay log "./mysqld-relay-bin.000001" position: 4130619 22:23:36 [Note] Slave I/O thread: connected to master "slave@10.10.0.236:3306",replication started in log "mysql-bin.001343" at position 107130620 14:04:21 [Note] Slave: received end packet from server, apparent master shutdown:130620 14:04:21 [Note] Slave I/O thread: Failed reading log event, reconnecting to retry, log "mysql-bin.001343" at position 2544563130620 14:04:21 [ERROR] Slave I/O: error reconnecting to master "slave@10.10.0.236:3306" - retry-time: 60retries: 86400, Error_code: 2003130620 14:13:45 [Note] Slave: connected to master "slave@10.10.0.236:3306",replication resumed in log "mysql-bin.001343" at position 2544563130623 22:04:17 [ERROR] Error reading packet from server: Lost connection to MySQL server during query （ server_errno=2013）130623 22:04:17 [Note] Slave I/O thread: Failed reading log event, reconnecting to retry, log "mysql-bin.001402" at position 121870679130623 22:04:20 [ERROR] Slave I/O: error reconnecting to master "slave@10.10.0.236:3306" - retry-time: 60retries: 86400, Error_code: 2003130623 22:08:29 [Note] Slave: connected to master "slave@10.10.0.236:3306",replication resumed in log "mysql-bin.001402" at position 121870679130623 22:08:29 [ERROR] Error reading packet from server: Client requested master to start replication from impossible position （ server_errno=1236）130623 22:08:29 [ERROR] Slave I/O: Got fatal error 1236 from master when reading data from binary log: "Client requested master to start replication from impossible position", Error_code: 1236130623 22:08:29 [Note] Slave I/O thread exiting, read up to log "mysql-bin.001402", position 121870679130623 22:26:29 [Note] Error reading relay log event: slave SQL thread was killed130623 22:26:34 [Note] "CHANGE MASTER TO executed". Previous state master_host="10.10.0.236", master_port="3306", master_log_file="mysql-bin.001402", master_log_pos="121870679". New state master_host="10.10.0.236", master_port="3306", master_log_file="mysql-bin.001403", master_log_pos="107".130623 22:26:42 [Note] Slave SQL thread initialized, starting replication in log "mysql-bin.001403" at position 107, relay log "./mysqld-relay-bin.000001" position: 4130623 22:26:42 [Note] Slave I/O thread: connected to master "slave@10.10.0.236:3306",replication started in log "mysql-bin.001403" at position 107130629 12:04:21 [ERROR] Error reading packet from server: Lost connection to MySQL server during query （ server_errno=2013）130629 12:04:21 [Note] Slave I/O thread: Failed reading log event, reconnecting to retry, log "mysql-bin.001501" at position 144001931130629 12:04:24 [ERROR] Slave I/O: error reconnecting to master "slave@10.10.0.236:3306" - retry-time: 60retries: 86400, Error_code: 2003130629 12:08:33 [Note] Slave: connected to master "slave@10.10.0.236:3306",replication resumed in log "mysql-bin.001501" at position 144001931130629 12:08:33 [ERROR] Error reading packet from server: Client requested master to start replication from impossible position （ server_errno=1236）130629 12:08:33 [ERROR] Slave I/O: Got fatal error 1236 from master when reading data from binary log: "Client requested master to start replication from impossible position", Error_code: 1236130629 12:08:33 [Note] Slave I/O thread exiting, read up to log "mysql-bin.001501", position 144001931130629 22:10:08 [Note] Error reading relay log event: slave SQL thread was killed130629 22:10:12 [Note] Slave SQL thread initialized, starting replication in log "mysql-bin.001501" at position 144001931, relay log "./mysqld-relay-bin.000296" position: 144002077130629 22:10:12 [Note] Slave I/O thread: connected to master "slave@10.10.0.236:3306",replication started in log "mysql-bin.001501" at position 144001931130629 22:10:12 [ERROR] Error reading packet from server: Client requested master to start replication from impossible position （ server_errno=1236）130629 22:10:12 [ERROR] Slave I/O: Got fatal error 1236 from master when reading data from binary log: "Client requested master to start replication from impossible position", Error_code: 1236130629 22:10:12 [Note] Slave I/O thread exiting, read up to log "mysql-bin.001501", position 144001931
尝试更改position位置恢复：URL：http://www.bianceng.cn/database/MySQL/201410/46087.htm
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