MySQL GTID主从复制1236错误

报错信息如下：

Got fatal error 1236 from master when reading data from binary log: 'The slave is connecting using CHANGE MASTER TO MASTER_AUTO_POSITION = 1, but the master has purged binary logs containing GTIDs that the slave requires.'

解决方法：

查看主库 master gtid_purged

mysql> show global variables like '%gtid%';

从库执行

mysql> stop slave;

mysql> reset slave;

mysql> reset master;

mysql> set @@global.gtid_purged='主库的GITD值';  # 这样会丢失部分数据，知晓

mysql> change master to master_host='MASTER_IP',master_port=PORT,master_user='USERNAME',master_password='PASSWORD',master_auto_position=1;

或 

mysql> CHANGE MASTER TO MASTER_AUTO_POSITION=1;

mysql> start slave;

mysql> show slave status G

注意：设置gtid_purged值时，gtid_executed值必须为空否则报错，该值清空的方法就是reset  master，reset slave命令。