call mtr.add_suppression("\\[Warning\\] InnoDB: Cannot find a free slot for an undo log. Do you have too"); drop database if exists mysqltest; create database mysqltest; CREATE TABLE mysqltest.transtable (id int unsigned NOT NULL PRIMARY KEY, val int DEFAULT 0) ENGINE=InnoDB; select count(*) from information_schema.processlist where command != 'Daemon'; count(*) 33 connection default; CREATE TABLE mysqltest.testtable (id int unsigned not null primary key) ENGINE=InnoDB; ERROR HY000: Can't create table `mysqltest`.`testtable` (errno: 177 "Too many active concurrent transactions") select count(*) from information_schema.processlist where command != 'Daemon'; count(*) 33 connection default; select count(*) from information_schema.processlist where command != 'Daemon'; count(*) 33 drop database mysqltest;