report error "1713 - Undo log record is too big" when update a record

[Victor Ke]

when I try to update a record with blob data,it occurs the following error：
[Err] 1713 - Undo log record is too big.

and I‘ve created more undo files by following cmds to fix this problem, but failed.

create undo tablespace undo_003 add datafile '/var/lib/mysql/undo_003.ibu';
create undo tablespace undo_004 add datafile '/var/lib/mysql/undo_004.ibu';
create undo tablespace undo_005 add datafile '/var/lib/mysql/undo_005.ibu';

I've found that it seems bug of mysql,
How can I quikly restore undo space?