include/master-slave.inc [connection master] CREATE TABLE t1 (a INT) ENGINE=MyISAM; SET GLOBAL rpl_semi_sync_master_enabled = ON; connection master1; SET DEBUG_SYNC = "rpl_semisync_master_commit_trx_before_lock SIGNAL m1_ready WAIT_FOR m1_cont"; INSERT INTO t1 SELECT * FROM t1; connection master; SET DEBUG_SYNC= "now WAIT_FOR m1_ready"; SET GLOBAL rpl_semi_sync_master_enabled = OFF; SET DEBUG_SYNC= "now SIGNAL m1_cont"; connection master1; connection master; DROP TABLE t1; SET DEBUG_SYNC= "RESET"; include/rpl_end.inc