On Apr 2, 2008, = at 3:40 PM, Peter L. Berghold wrote:

Hi = folks,

I asked a similar question last week and I'm still = scratching my head here.

In order to track down what I'm missing = I created a very simple
application using Hibernate (if such exists) = against a local database
defining only one table.

I've created = my geronimo-web.xml file that looks like:

<?xml version=3D"1.0" = encoding=3D"UTF-8"?>
<web-app xmlns=3D"http://geronimo.ap= ache.org/xml/ns/j2ee/web-1.2">
=    <environment>
=        <moduleId>
=            <grou= pId>net.berghold.testgeronimo.website</groupId>
=            <arti= factId>Geronimo_Test_Hibernate_App</artifactId>
=            <vers= ion>2.0</version>
=            <type= >war</type>
=        </moduleId>
=    </environment>
=    <context-root>/testgapp</context-root>

<= /web-app>

Simple... simple...

The only JSP page does = this:

<%
Mytest mt =3D new Mytest(new = Date().toString(),"A Field");
MytestDAO dao =3D new = MytestDAO();
=
dao.save(mt);

= %>

Simple... simple...

What I'm seeing happen is the data = never gets saved. Looking at the
logs I see a variety of errors = that pique my interest.

%%%% Error Creating SessionFactory = %%%%
java.lang.ClassCastException: java.util.HashSet
=        at
org.hibernate.util.Propert= iesHelper.resolvePlaceHolders(PropertiesHelper.java:88)

being one = and

%%%% Error Creating SessionFactory = %%%%
org.hibernate.MappingException: Could not read mappings from = resource:
net/berghold/tg/persistance/Mytest.hbm.xml

being = another and even more interesting is

Caused by: = org.hibernate.DuplicateMappingException: Duplicate
class/entity = mapping net.berghold.tg.persistance.Mytest

What = the...?

What is special about deploying Hibernate based apps = under Geronimo that
web searches haven't revealed, or will Hibernate = even work under Geronimo?

The HibernateSessionFactory that I'm = using is pretty stock stuff that
you find on the Hibernate.org = website. Looking at the book
"Professional Apache Geronimo" = yields no mention of Hibernate at all
which is really making me begin = to wonder.

Anybody got any ideas out = there?

One of the components used by = Geronimo is setting a system property to a value that is not a String = and Hibernate is expecting only String values in system = properties.

You should be able to avoid = this by setting the following:

export = GERONIMO_OPTS=3D-Dorg.apache.activeio.journal.active.DisableLocking=3Dtrue

<= div>