rpl.rpl_heartbeat can fail when (BB) mtr reorders tests

rpl.rpl_heartbeat                        w8 [ fail ]

        Test ended at 2024-04-29 19:24:42

CURRENT_TEST: rpl.rpl_heartbeat

analyze: sync_with_master

Slave position:  file:   position: 4

Master position: file: master-bin.000001  position: 640

mysqltest: At line 119: sync_slave_with_master failed: 'select master_pos_wait('master-bin.000001', 640, 300, '')' returned -1 indicating timeout after 300 seconds

The result from queries just before the failure was:

< snip >

Value	5.001

reset slave;

set @@global.slave_net_timeout= 5;

change master to master_host='127.0.0.1',master_port=MASTER_PORT, master_user='root', master_heartbeat_period= 4;

show status like 'Slave_heartbeat_period';;

Variable_name	Slave_heartbeat_period

Value	4.000

set @@global.slave_net_timeout= 3 /* must be a warning */;

reset slave;

connection master;

drop table if exists t1;

connection slave;

set @@global.slave_net_timeout= 10;

change master to master_host='127.0.0.1',master_port=MASTER_PORT, master_user='root', master_ssl_verify_server_cert=0, master_heartbeat_period= 0.5;

show status like 'Slave_heartbeat_period';;

Variable_name	Slave_heartbeat_period

Value	0.500

start slave;

connection master;

create table t1 (f1 int);

Last_IO_Error	Got fatal error 1236 from master when reading data from binary log: 'Error: connecting slave requested to start from GTID 0-1-3, which is not in the master's binlog'