connection node_2;
connection node_1;
connection node_1;
connection node_2;
connection node_2;
SET @@global.wsrep_sst_donor = NULL;
ERROR 42000: Variable 'wsrep_sst_donor' can't be set to the value of 'NULL'
SET @@global.wsrep_cluster_address='NULL';
SET SESSION wsrep_sync_wait=0;
SELECT @@wsrep_sst_donor;
@@wsrep_sst_donor

SELECT @@wsrep_cluster_address;
@@wsrep_cluster_address
NULL
SHOW STATUS LIKE 'wsrep_ready';
Variable_name	Value
wsrep_ready	OFF
SHOW STATUS LIKE 'wsrep_cluster_status';
Variable_name	Value
wsrep_cluster_status	Disconnected
call mtr.add_suppression("WSREP: .*Invalid backend URI.*");
call mtr.add_suppression("WSREP: gcs connect failed: Invalid argument");
disconnect node_2;
disconnect node_1;