CREATE TABLE t1 (f1 INTEGER PRIMARY KEY) Engine=InnoDB; connection node_1; SET SESSION wsrep_OSU_method = "TOI"; SET DEBUG_SYNC = 'alter_table_before_open_tables WAIT_FOR continue'; ALTER TABLE t1 ADD COLUMN f2 INTEGER;; connect node_1a, 127.0.0.1, root, , test, $NODE_MYPORT_1; connection node_1a; SET SESSION wsrep_sync_wait = 0; SET GLOBAL wsrep_OSU_method = "RSU"; SET DEBUG_SYNC= 'now SIGNAL continue'; connection node_1; SELECT COUNT(*) = 2 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 't1'; COUNT(*) = 2 1 INSERT INTO t1 VALUES (1,2); connection node_2; SELECT COUNT(*) = 2 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 't1'; COUNT(*) = 2 1 INSERT INTO t1 VALUES (3,4); connection node_1; SET GLOBAL wsrep_OSU_method = "TOI"; DROP TABLE t1; SET DEBUG_SYNC= 'RESET'; connection node_1a; SET DEBUG_SYNC= 'RESET';