mysql主从同步异常
查看主从状态
主服务器
mysql> show master status;
+------------------+-----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+-----------+--------------+------------------+-------------------+
| mysql-bin.000467 | 509113942 | | | |
+------------------+-----------+--------------+------------------+-------------------+
从服务器
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.11.11
Master_User: repluser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000467
Read_Master_Log_Pos: 537072113
Relay_Log_File: mysql-relay-bin.001357
Relay_Log_Pos: 789610157
Relay_Master_Log_File: mysql-bin.000454
Slave_IO_Running: Yes
Slave_SQL_Running: No
Replicate_Do_DB:
Replicate_Ignore_DB: mysql,information_schema
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 1060
Last_Error: Error 'Duplicate column name 'AES_TEL1'' on query. ....
原因：
错误的认为从库是主库，在从库做了alter table 修改表结构，之后发现是从库后又在主库上做了该操作，主库做完操作后从库也会执行这个语句，但是由于从库上已经做了修改，所以主从线程更改表失败，就会看到从库状态如上面所示，手动解决这个问题：
mysql>set global sql_slave_skip_counter=1;
mysql>start slave;
告诉从库，让它忽略掉这个错误继续执行同步。
参考：https://www.cnblogs.com/cobbliu/p/4227183.html
