*** MDEV-25611: RESET MASTER hangs waiting for InnoDB to flush its log
SET @old_dbug= @@global.DEBUG_DBUG;
SET GLOBAL debug_dbug="+d,ib_log_checkpoint_avoid";
SET @old_flush= @@GLOBAL.innodb_flush_log_at_trx_commit;
SET GLOBAL innodb_flush_log_at_trx_commit= 0;
SET @old_flush_timeout= @@GLOBAL.innoDB_flush_log_at_timeout;
SET GLOBAL innoDB_flush_log_at_timeout=2700;
connection default;
CREATE TABLE t1 (a INT PRIMARY KEY, b INT) ENGINE=InnoDB STATS_PERSISTENT=0;
INSERT INTO t1 VALUES (1,1);
INSERT INTO t1 VALUES (2,1);
INSERT INTO t1 VALUES (3,1);
connect  stop_purge,localhost,root,,;
START TRANSACTION WITH CONSISTENT SNAPSHOT;
connection default;
INSERT INTO t1 VALUES (4,2);
DELETE FROM t1 WHERE a in (1,2,3);
FLUSH BINARY LOGS;
connection stop_purge;
ROLLBACK;
connection default;
disconnect stop_purge;
RESET MASTER;
connection default;
DROP TABLE t1;
SET GLOBAL debug_dbug= @old_dbug;
SET GLOBAL innodb_flush_log_at_trx_commit= @old_flush;
SET GLOBAL innoDB_flush_log_at_timeout= @old_flush_timeout;