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;










