stop slave;
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;
start slave;
RESET SLAVE;
CHANGE MASTER TO master_host='127.0.0.1',master_port=MASTER_PORT,master_user='root';
START SLAVE IO_THREAD;
SHOW SLAVE HOSTS;
Server_id	Host	Port	Master_id
3	slave2	DEFAULT_PORT	1
2		SLAVE_PORT	1
STOP SLAVE IO_THREAD;
SHOW SLAVE HOSTS;
Server_id	Host	Port	Master_id
2		SLAVE_PORT	1