CREATE TABLE t1(k int not null primary key auto_increment) engine=ndb; INSERT INTO t1 VALUES (NULL); INSERT INTO t1 SELECT NULL FROM t1; INSERT INTO t1 SELECT NULL FROM t1; INSERT INTO t1 SELECT NULL FROM t1; INSERT INTO t1 SELECT NULL FROM t1; ALTER TABLE t1 ADD COLUMN c3 INT COLUMN_FORMAT DYNAMIC; ERROR HY000: Got error 762 'Unable to alter table as backup is in progress' from NDBCLUSTER DROP TABLE t1; Test for Bug#28563639: Backup aborts during cleanup of log-event-related triggers use test; create table t1(id int unsigned primary key, val varchar(100) unique, val2 varchar(100) unique, val3 varchar(100) unique, val4 varchar(100) unique, val5 varchar(100) unique, updates int unsigned) engine=ndb; Start backup nowait Starting backup Backup started Wait for backup to complete Starting backup Backup started drop table t1;