mariadb/mysql-test/suite/galera_sr/t/mysql-wsrep-features#35.test

--source include/have_debug_sync.inc
--source include/galera_cluster.inc

CREATE TABLE t1 (f1 INTEGER PRIMARY KEY) ENGINE=InnoDB;

# Block node #2's applier so that it is able to issue a conflicting INSERT before
# node #1 INSERTs have been applied on it.

--connect node_2a, 127.0.0.1, root, , test, $NODE_MYPORT_2
SELECT COUNT(*) = 0 FROM t1;
SET SESSION wsrep_sync_wait = 0;
SET GLOBAL debug_dbug = '+d,sync.wsrep_apply_cb';

--connection node_1
SET SESSION wsrep_trx_fragment_size = 1;
SET AUTOCOMMIT=OFF;
START TRANSACTION;

INSERT INTO t1 VALUES (1);
INSERT INTO t1 VALUES (2);
INSERT INTO t1 VALUES (3);
INSERT INTO t1 VALUES (4);
INSERT INTO t1 VALUES (5);

--connection node_2a
SET SESSION debug_sync = "now WAIT_FOR sync.wsrep_apply_cb_reached";

--connection node_2
SET SESSION wsrep_sync_wait = 0;
SELECT COUNT(*) = 0 FROM t1;
--send INSERT INTO t1 VALUES (1);

--connection node_1
COMMIT;

--connection node_2a
SET GLOBAL debug_dbug = '';
SET DEBUG_SYNC = "now SIGNAL signal.wsrep_apply_cb";

--connection node_2
--error ER_DUP_ENTRY,ER_LOCK_DEADLOCK
--reap
ROLLBACK;

DROP TABLE t1;

--connection node_2a
SET DEBUG_SYNC = "RESET";