CREATE TABLE t1 (f1 INTEGER) Engine=InnoDB;
SET GLOBAL wsrep_desync=1;
SET wsrep_OSU_method=RSU;
SET DEBUG_SYNC = 'alter_table_before_open_tables WAIT_FOR continue';
ALTER TABLE t1 ADD COLUMN f2 INTEGER;;
SET GLOBAL wsrep_desync=0;
SET DEBUG_SYNC= 'now SIGNAL continue';
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `f1` int(11) DEFAULT NULL,
  `f2` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1
SHOW VARIABLES LIKE 'wsrep_desync';
Variable_name	Value
wsrep_desync	OFF
SET wsrep_OSU_method=TOI;
DROP TABLE t1;
SET DEBUG_SYNC= 'RESET';
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_create_table_no_lock WAIT_FOR continue';
ALTER TABLE t1 ADD COLUMN f2 INTEGER;;
SET GLOBAL wsrep_desync=1;;
SET DEBUG_SYNC= 'now SIGNAL continue';
SET GLOBAL wsrep_desync=0;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `f1` int(11) DEFAULT NULL,
  `f2` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1
SET wsrep_OSU_method=TOI;
DROP TABLE t1;
SET DEBUG_SYNC= 'RESET';
CALL mtr.add_suppression("Protocol violation");
CALL mtr.add_suppression("desync failed");
CALL mtr.add_suppression("Protocol violation");