connection node_2; connection node_1; connect node_1a, 127.0.0.1, root, , test, $NODE_MYPORT_1; connect node_1b, 127.0.0.1, root, , test, $NODE_MYPORT_1; connection node_1; CREATE TABLE t1 (f1 INTEGER) Engine=InnoDB; SET GLOBAL wsrep_desync=0; Warnings: Warning 1231 'wsrep_desync' is already OFF. SET wsrep_OSU_method=RSU; SET DEBUG_SYNC = 'alter_table_before_open_tables WAIT_FOR continue'; ALTER TABLE t1 ADD COLUMN f2 INTEGER;; connection node_1a; SET GLOBAL wsrep_desync=1;; connection node_1b; SET DEBUG_SYNC= 'now SIGNAL continue'; DROP TABLE t1; SET GLOBAL wsrep_desync=0; connection node_1; connection node_1a; SET DEBUG_SYNC= 'RESET';