# Scenario:
# con1 acquires a shared lock
# con2 wants an exclusive lock and has to wait
# con3 wants a shared lock, and would have to wait for con2,
#      but con3 is a HP trx and does not want to wait, so it
#      jumps the queue, and gets the lock, and commits
# con1 also commits
# con2 should now acquire the lock and can commit

--source include/have_debug_sync.inc

CREATE TABLE t1 (c1 INT NOT NULL PRIMARY KEY) ENGINE=InnoDB;
INSERT INTO t1 VALUES (0);

--connect(con1,localhost,root,,test)
--connect(con2,localhost,root,,test)
--connect(con3,localhost,root,,test)

--connection con1
    --echo # On connection 1
    BEGIN;
    SELECT * FROM t1 WHERE c1=0 FOR SHARE;

--connection con2
    --echo # On connection 2
    BEGIN;
    SET DEBUG_SYNC = 'lock_wait_will_wait SIGNAL con2_will_wait';
    --send SELECT * FROM t1 WHERE c1=0 FOR UPDATE

--connection con3
    --echo # On connection 3
    SET DEBUG_SYNC = 'now WAIT_FOR con2_will_wait';
    --source include/start_transaction_high_prio.inc
    SELECT * FROM t1 WHERE c1=0 FOR SHARE;
    COMMIT;

--connection con1
    --echo # On connection 1
    COMMIT;

--connection con2
    --echo # On connection 2
    --reap
    COMMIT;

--connection default
--disconnect con1
--disconnect con2
--disconnect con3

DROP TABLE t1;