connection node_2;
connection node_1;
connection node_1;
CREATE TABLE t1 (f1 INTEGER PRIMARY KEY, f2 CHAR(1)) engine=innodb;
CREATE TABLE t2 (f1 INTEGER PRIMARY KEY, f2 CHAR(1)) engine=innodb;
INSERT INTO t1 VALUES (1, 'a');
INSERT INTO t1 VALUES (2, 'a');
SET AUTOCOMMIT=ON;
START TRANSACTION;
UPDATE t1 SET f2 = 'b' WHERE f1 = 1;
connect node_1a, 127.0.0.1, root, , test, $NODE_MYPORT_1;
connection node_1a;
SET SESSION wsrep_sync_wait=0;
LOCK TABLE t2 WRITE;
connection node_1;
SET DEBUG_SYNC= 'wsrep_before_mdl_wait SIGNAL before_mdl_wait WAIT_FOR mdl_wait_continue';
SELECT * FROM t2;;
connection node_1a;
# Wait until select is blocked before MDL lock wait
SET DEBUG_SYNC= 'now WAIT_FOR before_mdl_wait';
connection node_1a;
SET @@debug_dbug = "d,sync.wsrep_after_BF_victim_lock";
connection node_2;
UPDATE t1 SET f2 = 'c' WHERE f1 = 1;
connect node_1b, 127.0.0.1, root, , test, $NODE_MYPORT_1;
connection node_1b;
SET SESSION wsrep_sync_wait=0;
# Wait for conflicting update to block
SET DEBUG_SYNC = "now SIGNAL signal.wsrep_after_BF_victim_lock";
connect node_1c, 127.0.0.1, root, , test, $NODE_MYPORT_1;
connection node_1c;
connection node_1a;
SET DEBUG_SYNC = "now SIGNAL BF_victim_continue";
UNLOCK TABLES;
connection node_1;
ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
connection node_1;
SELECT COUNT(*) AS EXPECT_1 FROM t1 WHERE f2 = 'a';
EXPECT_1
1
SELECT COUNT(*) AS EXPECT_1 FROM t1 WHERE f2 = 'c';
EXPECT_1
1
SELECT * FROM t1;
f1	f2
1	c
2	a
connection node_2;
SELECT COUNT(*) AS EXPECT_1 FROM t1 WHERE f2 = 'a';
EXPECT_1
1
SELECT COUNT(*) AS EXPECT_1 FROM t1 WHERE f2 = 'c';
EXPECT_1
1
SELECT * FROM t1;
f1	f2
1	c
2	a
DROP TABLE t1;
DROP TABLE t2;
connection node_1a;
SET DEBUG_SYNC = "RESET";
connection node_1b;
SET DEBUG_SYNC = "RESET";
connection node_1;
disconnect node_1a;
disconnect node_1b;
disconnect node_1c;