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copied!<p>The original configuration you had posted (jboss-web.xml and jboss-classloading.xml) works for me on EAP-5.12. </p> <p>Apparently the jboss-web.xml's </p> <pre><code>java2ClassLoadingCompliance="false" </code></pre> <p>and/or </p> <pre><code> <loader-repository-config> java2ParentDelegation=false </loader-repository-config> </code></pre> <p>are being ignored by Jboss. See <a href="http://docs.jboss.org/jbossesb/docs/4.10/manuals/html/Getting_Started_Guide/index.html#sect-scoped_deploy" rel="nofollow">http://docs.jboss.org/jbossesb/docs/4.10/manuals/html/Getting_Started_Guide/index.html#sect-scoped_deploy</a> where this is mentioned (community edition, but apparently also valid for the blessed edition of jboss)</p> <p>I had been struggling w/ this for a long time. Then gave up. Then recently revisited it and stumbled on the jboss-classloading.xml solution. </p> <p>Without it, I would get ClassCastException:</p> <p>java.lang.ClassCastException: org.hibernate.ejb.HibernatePersistence cannot be cast to javax.persistence.spi.PersistenceProvider</p> <p>I have a later version (3.6.0.Final) of hibernate-entitymanager in the war than what is used by Jboss.</p> <pre><code> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-entitymanager</artifactId> <version>3.6.0.Final</version> <type>jar</type> <scope>compile</scope> </dependency> </code></pre> <p>What's great about this, now that it works, is I can deploy same war on tomcat and jboss. (tomcat in the cloud for a backup solution, and jboss on the "ground".)</p>

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