GTID主从异常报错1236
ast_IO_Errno: 1236
Last_IO_Error: 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. Replicate the missing transactions from elsewhere, or provision a new slave from backup. Consider increasing the master's binary log expiration period. The GTID set sent by the slave is '', and the missing transactions are '6c15ecda-03f3-11ec-987e-6c92bff6906b:1-5,
a75b06d9-03ec-11ec-9ca3-6c92bff6a8fb:1-6'.'
解决办法：
在主节点执行：
show variables like '%gtid_purged%';
+---------------+------------------------------------------------------------------------------------+
| Variable_name | Value |
+---------------+------------------------------------------------------------------------------------+
| gtid_purged | 6c15ecda-03f3-11ec-987e-6c92bff6906b:1-5,
a75b06d9-03ec-11ec-9ca3-6c92bff6a8fb:1-6 |
+---------------+------------------------------------------------------------------------------------+
然后再在从节点设置gtid_purged为主节点gtid_purged值。
stop slave;
set global gtid_purged="6c15ecda-03f3-11ec-987e-6c92bff6906b:1-5,
a75b06d9-03ec-11ec-9ca3-6c92bff6a8fb:1-6";
start slave;
show slave status\G