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: NULL
Master_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: 0
1 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