Did you set your own datasource in jbosscmp-jdbc.xml under the element?
if u deploy any orielly ejb sample code u will find
that they use datasorece as DefaultDS which as
Hypersonic database within jboss app server
hqsqldb-ds.xml file is use to connect to Hypersonic database
if u want to use ur own datasource then see this C:\jboss-3.2.3\docs\examples\jca/ path in ur jboss here u will find -ds.xml file used for various
made changes in -ds.xml and put that file in C:\jboss-3.2.3\server\default\deploy folder of ur jboss
create ur own -ds.xml and delopy it in specified folder and see that application contain
jbosscmp-jdbc.xml file with with datasorce u mention in -ds.xml
Yes, I do have my own datasource set in descriptor but for unknown reason in Entities with unidirectional relation using foreign key I get above mentioned warning.