Can't deploy TopLink JPA on JBoss 5.1

Question

Greetings,
I'm migrating from Hibernate to TopLink on JBoss 5.1. My new persistence.xml is the following:
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
version="1.0">
<persistence-unit name="m2o-jar">
<provider>oracle.toplink.essentials.PersistenceProvider</provider>
<jta-data-source>java:/TestDS</jta-data-source>
<properties>
<property name="toplink.weaving" value="false" />
<property name="toplink.target-database" value="MySQL" />
<property name="toplink.jdbc.driver" value="com.mysql.jdbc.Driver" />
<property name="toplink.external.transaction.controller.class.name" value="oracle.toplink.essentials.transaction.jboss.JbossTransactionController"/>
<property name="toplink.ddl-generation" value="drop-and-create-tables" />
<property name="toplink.logging.level" value="FINEST" />
<property name="toplink.show_sql" value="true" />
</properties>
</persistence-unit>
</persistence>
While deploying on JBoss 5.1 I have the following:
19:39:46,800 INFO [Ejb3DependenciesDeployer] Encountered deployment AbstractVFSDeploymentContext@650761918{vfsfile:/home/nicolas/workspace/jds40/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_EAP_5.1_Runtime_Server1311339484761/deploy/m2o-ear.ear/m2o-ejb.jar/}
19:39:46,800 INFO [Ejb3DependenciesDeployer] Encountered deployment AbstractVFSDeploymentContext@650761918{vfsfile:/home/nicolas/workspace/jds40/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_EAP_5.1_Runtime_Server1311339484761/deploy/m2o-ear.ear/m2o-ejb.jar/}
19:39:46,939 INFO [JBossASKernel] Created KernelDeployment for: m2o-ejb.jar
19:39:46,939 INFO [JBossASKernel] installing bean: jboss.j2ee:ear=m2o-ear.ear,jar=m2o-ejb.jar,name=Facade,service=EJB3
19:39:46,939 INFO [JBossASKernel] with dependencies:
19:39:46,939 INFO [JBossASKernel] and demands:
19:39:46,939 INFO [JBossASKernel]      jboss.ejb:service=EJBTimerService
19:39:46,939 INFO [JBossASKernel]      persistence.unit:unitName=m2o-ear.ear/m2o-ejb.jar#m2o-jar
19:39:46,939 INFO [JBossASKernel] and supplies:
19:39:46,939 INFO [JBossASKernel]      jndi:m2o-ear/Facade/remote-de.dbag.jpa.m2o.FacadeRemote
19:39:46,939 INFO [JBossASKernel]      jndi:m2o-ear/Facade/remote
19:39:46,939 INFO [JBossASKernel]      jndi:/ejb/Facade/remote
19:39:46,939 INFO [JBossASKernel]      Class:de.dbag.jpa.m2o.FacadeRemote
19:39:46,939 INFO [JBossASKernel] Added bean(jboss.j2ee:ear=m2o-ear.ear,jar=m2o-ejb.jar,name=Facade,service=EJB3) to KernelDeployment of: m2o-ejb.jar
19:39:46,956 INFO [PersistenceUnitDeployment] Starting persistence unit persistence.unit:unitName=m2o-ear.ear/m2o-ejb.jar#m2o-jar
19:39:47,120 INFO [STDOUT] [TopLink Finest]: 2011.07.25 07:39:47.107--ServerSession(109396896)--Thread(Thread[HDScanner,5,jboss])--property=toplink.weaving; value=false
19:39:47,121 INFO [STDOUT] [TopLink Finest]: 2011.07.25 07:39:47.120--ServerSession(109396896)--Thread(Thread[HDScanner,5,jboss])--property=toplink.orm.throw.exceptions; default value=true
19:39:47,149 INFO [STDOUT] [TopLink Finer]: 2011.07.25 07:39:47.148--ServerSession(109396896)--Thread(Thread[HDScanner,5,jboss])--Searching for default mapping file in file:/home/nicolas/workspace/jds40/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_EAP_5.1_Runtime_Server1311339484761/deploy/m2o-ear.ear/m2o-ejb.jar/
19:39:47,157 INFO [STDOUT] [TopLink Warning]: 2011.07.25 07:39:47.157--Thread(Thread[HDScanner,5,jboss])--java.lang.NullPointerException: null was thrown on attempt of PersistenceLoadProcessor to load class de.dbag.jpa.m2o.Facade. The class is ignored.
19:39:47,158 INFO [STDOUT] [TopLink Warning]: 2011.07.25 07:39:47.157--Thread(Thread[HDScanner,5,jboss])--java.lang.NullPointerException: null was thrown on attempt of PersistenceLoadProcessor to load class de.dbag.jpa.m2o.Product. The class is ignored.
19:39:47,158 INFO [STDOUT] [TopLink Warning]: 2011.07.25 07:39:47.158--Thread(Thread[HDScanner,5,jboss])--java.lang.NullPointerException: null was thrown on attempt of PersistenceLoadProcessor to load class de.dbag.jpa.m2o.FacadeRemote. The class is ignored.
19:39:47,158 INFO [STDOUT] [TopLink Warning]: 2011.07.25 07:39:47.158--Thread(Thread[HDScanner,5,jboss])--java.lang.NullPointerException: null was thrown on attempt of PersistenceLoadProcessor to load class de.dbag.jpa.m2o.Instrument. The class is ignored.
19:39:47,162 INFO [STDOUT] [TopLink Finest]: 2011.07.25 07:39:47.162--ServerSession(109396896)--Thread(Thread[HDScanner,5,jboss])--end predeploying Persistence Unit m2o-jar; state Predeployed; factoryCount 1
19:39:47,213 INFO [SessionSpecContainer] Starting jboss.j2ee:ear=m2o-ear.ear,jar=m2o-ejb.jar,name=Facade,service=EJB3
19:39:47,215 INFO [EJBContainer] STARTED EJB: de.dbag.jpa.m2o.Facade ejbName: Facade
19:39:47,246 INFO [JndiSessionRegistrarBase] Binding the following Entries in Global JNDI:
     /ejb/Facade/remote - EJB3.x Default Remote Business Interface
     m2o-ear/Facade/remote-de.dbag.jpa.m2o.FacadeRemote - EJB3.x Remote Business Interface
I have toplink-essentials.jar and hibernate-entitymanager.jar on the classpath. Please help.
Kind regards,
Nicolas DUMINIL

Answer 1

Hello,
More information is required to help you, and as James suggested, the best option would be to move to EclipseLink instead of TopLink Essentials as EclipseLink is actively being developed and is the JPA 2 RI.
Running it on the latest EclipseLink ensures that you are not hitting an issue that has already been fixed, and both are based off TopLink.
Are you deploying an Ear or an exploded directory? If the later, can you try using an Ear?
Best Regards,
Chris