Description:
mysql> CREATE LOGFILE GROUP lg1 ADD UNDOFILE '/space/run/undofile.dat'
INITIAL_SIZE 16M UNDO_BUFFER_SIZE = 1M ENGINE=NDB; ERROR 1502 (HY000): Failed to create
UNDOFILE

Error message need to be more descriptive. For Example:
 "ERROR 1502 (HY000): Failed to create UNDOFILE. File already exists! This might be a
result of specifying an absolute path in a multi node configuration. "

How to repeat:
see above

I expanded error message...please retest

Sorry, still getting same message.

Sorry, still getting same message.

Didnt I mention that I added them in "show warnings"...

mysql> CREATE LOGFILE GROUP lg2 ADD UNDOFILE '/space/run/undofile.dat' INITIAL_SIZE 16M
UNDO_BUFFER_SIZE = 1M ENGINE=NDB;
ERROR 1502 (HY000): Failed to create UNDOFILE
mysql> show warnings;
+-------+------+--------------------------------------------------------------------------
--+
| Level | Code | Message                                                                  
 |
+-------+------+--------------------------------------------------------------------------
--+
| Error | 1296 | Got error 1509 'File system error, check if path,permissions etc' from
NDB |
| Error | 1502 | Failed to create UNDOFILE                                                
 |
+-------+------+--------------------------------------------------------------------------
--+
2 rows in set (0.00 sec)

Does this need a changelog entry? What is the version number, what should the text be?

Thank you for your bug report. This issue has been committed to our
source repository of that product and will be incorporated into the
next release.

If necessary, you can access the source repository and build the latest
available version, including the bugfix, yourself. More information 
about accessing the source trees is available at
    http://www.mysql.com/doc/en/Installing_source_tree.html

Additional info:

Documented in 5.1.6 changelog. Closed.