connection node_2;
connection node_1;
CREATE TABLE grandparent (
id INT NOT NULL PRIMARY KEY
) ENGINE=InnoDB;
CREATE TABLE parent (
id INT NOT NULL PRIMARY KEY,
grandparent_id INT,
FOREIGN KEY (grandparent_id)
REFERENCES grandparent(id)
ON UPDATE CASCADE
) ENGINE=InnoDB;
CREATE TABLE child (
id INT NOT NULL PRIMARY KEY, 
grandparent_id INT,
FOREIGN KEY (grandparent_id)
REFERENCES parent(grandparent_id)
ON UPDATE CASCADE
) ENGINE=InnoDB;
INSERT INTO grandparent VALUES (1),(2),(3),(4);
INSERT INTO parent VALUES (1,1), (2,2);
INSERT INTO child VALUES (1,1), (2,2);
connection node_1;
SET AUTOCOMMIT=OFF;
SET SESSION wsrep_trx_fragment_size = 1;
START TRANSACTION;
UPDATE grandparent SET id = 5 WHERE id = 1;
connection node_2;
SET SESSION innodb_lock_wait_timeout = 1;
UPDATE grandparent SET id = 10 WHERE id = 5;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
DELETE FROM child;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
connection node_1;
COMMIT;
include/diff_servers.inc [servers=1 2]
DROP TABLE child;
DROP TABLE parent;
DROP TABLE grandparent;