connection node_2; connection node_1; CREATE TABLE t1 (f1 INTEGER PRIMARY KEY, f2 int, f3 varchar(2000)); INSERT INTO t1 VALUES (1, 0, REPEAT('1234567890', 200)); INSERT INTO t1 VALUES (3, 3, REPEAT('1234567890', 200)); SET SESSION wsrep_sync_wait=0; SET GLOBAL DEBUG_DBUG = "d,sync.wsrep_apply_cb"; connect node_1a, 127.0.0.1, root, , test, $NODE_MYPORT_1; connection node_1a; SET SESSION wsrep_sync_wait=0; connection node_1; begin; select f1,f2 from t1; f1 f2 1 0 3 3 connection node_2; UPDATE t1 SET f2=2 WHERE f1=3; connection node_1a; SET SESSION DEBUG_SYNC = "now WAIT_FOR sync.wsrep_apply_cb_reached"; connection node_1; UPDATE t1 SET f2=1 WHERE f1=3; SET GLOBAL wsrep_provider_options = 'dbug=d,commit_monitor_master_enter_sync'; COMMIT; connection node_1a; SET SESSION wsrep_on = 0; SET SESSION wsrep_on = 1; SET GLOBAL wsrep_provider_options = 'dbug='; SET GLOBAL wsrep_provider_options = 'signal=commit_monitor_master_enter_sync'; SET GLOBAL DEBUG_DBUG = ""; SET DEBUG_SYNC = "now SIGNAL signal.wsrep_apply_cb"; SET GLOBAL debug_dbug = NULL; SET debug_sync='RESET'; connection node_1; ERROR 40001: Deadlock found when trying to get lock; try restarting transaction select f1,f2 from t1; f1 f2 1 0 3 2 DROP TABLE t1;