# Verify that after CHANGE MASTER, replication (I/O thread and SQL
# thread) restart from where SQL thread left, not from where
# I/O thread left (some old bug fixed in 4.0.17)

source include/master-slave.inc;

connection master;
# Make SQL slave thread advance a bit
create table t1(n int);
sync_slave_with_master;
select * from t1;
# Now stop it and make I/O slave thread be ahead
stop slave sql_thread;
connection master;
insert into t1 values(1);
insert into t1 values(2);
save_master_pos;
let $slave_param= Read_Master_Log_Pos;
let $slave_param_value= query_get_value(SHOW MASTER STATUS, Position, 1);
connection slave;
source include/wait_for_slave_param.inc;
source include/stop_slave.inc;

let $read_pos= query_get_value(SHOW SLAVE STATUS, Read_Master_Log_Pos, 1);
let $exec_pos= query_get_value(SHOW SLAVE STATUS, Exec_Master_Log_Pos, 1);
if (`SELECT $read_pos = $exec_pos`)
{
  source include/show_rpl_debug_info.inc;
  echo 'Read_Master_Log_Pos: $read_pos' == 'Exec_Master_Log_Pos: $exec_pos';
  die Failed because Read_Master_Log_Pos is equal to Exec_Master_Log_Pos;
} 
change master to master_user='root';
let $read_pos= query_get_value(SHOW SLAVE STATUS, Read_Master_Log_Pos, 1);
let $exec_pos= query_get_value(SHOW SLAVE STATUS, Exec_Master_Log_Pos, 1);
if (`SELECT $read_pos <> $exec_pos`)
{
  source include/show_rpl_debug_info.inc;
  echo 'Read_Master_Log_Pos: $read_pos' <> 'Exec_Master_Log_Pos: $exec_pos';
  die Failed because Read_Master_Log_Pos is not equal to Exec_Master_Log_Pos;
}

start slave;
sync_with_master;
select * from t1;
connection master;
drop table t1;
save_master_pos;
connection slave;
sync_with_master;

# End of 4.1 tests
--source include/rpl_end.inc