TopLink deployment problem

Question

Hi
I have an application using TopLink. In my development environment, i am able to access the SessionFacadeBean, directly. This is, i can do a new SessionFacadeBean(), and i get the facade and can freely invoke their methods and routines
However, i am trying to deploy the app to a OC4J standalone, and when i do it, everytime i try to use the SessionFacadeBean methods directly, the applications crashes
There is no much relevant information about the problem, but i have noticed one common issue:
at oracle.toplink.util.SessionFactory.acquireSession(SessionFactory.java:116)
     at ec.com.carrasco.spyral.stgc.portal.model.app.StgcAdminFacadeBean.findAppuserSessionDataByLogin(StgcAdminFacadeBean.java:288)
     at ec.com.carrasco.spyral.stgc.portal.view.web.session.AppSessionUser.loadUserData(AppSessionUser.java:75)
     at ec.com.carrasco.spyral.stgc.portal.view.web.session.AppSessionUser.getUserName(AppSessionUser.java:54)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at com.sun.faces.el.PropertyResolverImpl.getValue(PropertyResolverImpl.java:79)
so, i think that for some reason, the acquireSession method cannot produce a working session and therefore, the app doesn't work ok
any ideas

Answer 1

Here is little more insight for the problem , further check reveals that :
start connecting rmwtest
exception occured for connection test , Exception [TOPLINK-4002] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: Listener refused the connection with the following error:
ORA-12514, TNS:listener does not currently know of service requested in connect descriptor
The Connection descriptor used by the client was:
//localhost:1521/ORCL
we do not have any idea how is localhost:1521/ORCL picked up , in our persistence.xml we have
where as rmwtest defined in persistence.xml as
<persistence-unit name="rmwtest" transaction-type="RESOURCE_LOCAL">
<provider>oracle.toplink.essentials.PersistenceProvider</provider>
<class>rmw.gnf.entity.ServSesnUser</class>
<class>rmw.gnf.entity.RmwData</class>
<class>rmw.gnf.entity.GnfData</class>
<properties>
<property name="toplink.logging.level" value="FINEST"/>
<property name="toplink.jdbc.driver" value="oracle.jdbc.driver.OracleDriver"/>
<property name="toplink.jdbc.url" value="jdbc:oracle:thin:@middb.1dc.com:1621:ukdbins"/>
<property name="toplink.jdbc.user" value="****"/>
<property name="toplink.jdbc.password" value="********"/>
</properties>
</persistence-unit>