All, getGroupId is The CMP accessor method on Entity Bean CustomFieldsEJBBean with the return type [int] which is a primitive in Java. public abstract void setGroupId (int groupId); public abstract int getGroupId (); For cmp-fileds(getGroupId is a cmp-field defined in deployment descriptor) with primitives as return types , [not null] default constraint is applied by JBoss. <cmp-field> <field-name>groupId</field-name> <column-name>custom_group_id</column-name> </cmp-field> I need to allow null for this cmp-field by updating deployment descriptor. I'm trying to find out a way to use <not-null> or others for this purpose. Help requested on this, as I am stuck on this in a porting project. Thanks and Regards, BS View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4049797#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...