slave stop;
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
reset master;
reset slave;
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
slave start;
select master_pos_wait('master-bin.999999',0,2);
master_pos_wait('master-bin.999999',0,2)
-1
 select master_pos_wait('master-bin.999999',0);
stop slave sql_thread;
master_pos_wait('master-bin.999999',0)
NULL