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; stop slave; reset slave; SET GLOBAL debug= "d,simulate_io_slave_error_on_init,simulate_sql_slave_error_on_init"; start slave; Reporting the following error: Failed during slave thread initialization call mtr.add_suppression("Failed during slave I/O thread initialization"); SET GLOBAL debug= ""; stop slave; reset slave; SET GLOBAL init_slave= "garbage"; start slave; Reporting the following error: Slave SQL thread aborted. Can't execute init_slave query SET GLOBAL init_slave= "";