SELECT * FROM performance_schema.replication_group_members;
set global read_only=0;
show master status;

START GROUP_REPLICATION;

STOP GROUP_REPLICATION;
reset master;

CHANGE MASTER TO MASTER_USER=‘copy’, MASTER_PASSWORD=‘123456’ FOR CHANNEL ‘group_replication_recovery’;

SET GLOBAL group_replication_bootstrap_group=ON;
START GROUP_REPLICATION;
SET GLOBAL group_replication_bootstrap_group=OFF;