mysql主从复制机制排错过程



一. 主机器发出一个sql，导致所有的从机同步出错的问题解决流程

a.)进入从机的mysql控制台

b.) 查看复制进程的信息

mysql> show slave status\G

c.) 关注以下3个key及其内容

Master_Host：192.168.1.212

Relay_Master_Log_File：mysql-master-001-bin.000348

Exec_Master_Log_Pos：330637

*************************** 1. row ***************************               Slave_IO_State:                  Master_Host: 192.168.1.212                  Master_User: replication                  Master_Port: 3306                Connect_Retry: 60              Master_Log_File: mysql-master-001-bin.000348          Read_Master_Log_Pos: 330637               Relay_Log_File: mysql-slave-001-bin.000345                Relay_Log_Pos: 4        Relay_Master_Log_File: mysql-master-001-bin.000348             Slave_IO_Running: No            Slave_SQL_Running: Yes              Replicate_Do_DB: meerkat          Replicate_Ignore_DB: mysql,information_schema           Replicate_Do_Table:       Replicate_Ignore_Table:      Replicate_Wild_Do_Table:  Replicate_Wild_Ignore_Table:                   Last_Errno: 0                   Last_Error:                 Skip_Counter: 0          Exec_Master_Log_Pos: 330637              Relay_Log_Space: 151              Until_Condition: None               Until_Log_File:                Until_Log_Pos: 0           Master_SSL_Allowed: No           Master_SSL_CA_File:           Master_SSL_CA_Path:              Master_SSL_Cert:            Master_SSL_Cipher:               Master_SSL_Key:        Seconds_Behind_Master: NULLMaster_SSL_Verify_Server_Cert: No                Last_IO_Errno: 1236                Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: 'Could not find first log file name in binary log index file'               Last_SQL_Errno: 0               Last_SQL_Error:  Replicate_Ignore_Server_Ids:             Master_Server_Id: 2                  Master_UUID: 3d3b9f4f-f74f-11e5-9a30-005056b324c4             Master_Info_File: mysql.slave_master_info                    SQL_Delay: 0          SQL_Remaining_Delay: NULL      Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it           Master_Retry_Count: 86400                  Master_Bind:      Last_IO_Error_Timestamp: 160719 14:16:46     Last_SQL_Error_Timestamp:               Master_SSL_Crl:           Master_SSL_Crlpath:           Retrieved_Gtid_Set:            Executed_Gtid_Set: 3d3b9f4f-f74f-11e5-9a30-005056b324c4:1-22:26-3944,40844d86-f74f-11e5-9a30-005056b370b3:1-4,73ae7f45-f74c-11e5-9a1e-005056b3294e:1-27485277:27485279-27487144                Auto_Position: 01 row in set (0.00 sec)

d.) 根据上面的3个可以的内容，修复同步

mysql> stop slave ;mysql> CHANGE MASTER TO MASTER_HOST='192.168.1.212', MASTER_LOG_FILE='mysql-master-001-bin.000348',  MASTER_LOG_POS=330637 , MASTER_AUTO_POSITION = 0 ;mysql> start slave ;mysql> show slave status\G