JavassistLazyInitializer is not able to load org.hibernate.proxy.HibernateProxy in EAP6

Issue

• While migrating application from previous JBoss release to EAP6 following error is encountered:

• When using JPA annotations with Hibernate in JBoss Fuse 6.0, we get the follow error:

15:48:28,867 ERROR [org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer] (MSC service thread 1-4) HHH000142: Javassist Enhancement failed: com.test.TestPersisteceLocal: java.lang.RuntimeException: by java.lang.NoClassDefFoundError: org/hibernate/proxy/HibernateProxy
        at javassist.util.proxy.ProxyFactory.createClass3(ProxyFactory.java:510)
        at javassist.util.proxy.ProxyFactory.createClass2(ProxyFactory.java:487)
        at javassist.util.proxy.ProxyFactory.createClass1(ProxyFactory.java:423)
        at javassist.util.proxy.ProxyFactory.createClass(ProxyFactory.java:395)
        at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.getProxyFactory(JavassistLazyInitializer.java:163)
        at org.hibernate.proxy.pojo.javassist.JavassistProxyFactory.postInstantiate(JavassistProxyFactory.java:66)
        at org.hibernate.tuple.entity.PojoEntityTuplizer.buildProxyFactory(PojoEntityTuplizer.java:221)
        at org.hibernate.tuple.entity.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:212)
        at org.hibernate.tuple.entity.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:82)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) [rt.jar:1.7.0_15]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) [rt.jar:1.7.0_15]
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [rt.jar:1.7.0_15]
        at java.lang.reflect.Constructor.newInstance(Constructor.java:525) [rt.jar:1.7.0_15]
        at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:135)
        at org.hibernate.tuple.entity.EntityTuplizerFactory.constructDefaultTuplizer(EntityTuplizerFactory.java:188)
        at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:341)
        at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:505)
        at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:146)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) [rt.jar:1.7.0_15]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) [rt.jar:1.7.0_15]
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [rt.jar:1.7.0_15]
        at java.lang.reflect.Constructor.newInstance(Constructor.java:525) [rt.jar:1.7.0_15]
        at org.hibernate.persister.internal.PersisterFactoryImpl.create(PersisterFactoryImpl.java:163)
        at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:135)
        at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:381)
        at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1746)
        .
        .
        .
Caused by: javassist.CannotCompileException: by java.lang.NoClassDefFoundError: org/hibernate/proxy/HibernateProxy
        at javassist.util.proxy.FactoryHelper.toClass(FactoryHelper.java:170)
        at javassist.util.proxy.ProxyFactory.createClass3(ProxyFactory.java:502)
        ... 38 more
Caused by: java.lang.NoClassDefFoundError: org/hibernate/proxy/HibernateProxy
        at java.lang.ClassLoader.defineClass1(Native Method) [rt.jar:1.7.0_15]
        at java.lang.ClassLoader.defineClass(ClassLoader.java:791) [rt.jar:1.7.0_15]
        at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source) [:1.7.0_15]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_15]
        at java.lang.reflect.Method.invoke(Method.java:601) [rt.jar:1.7.0_15]
        at javassist.util.proxy.FactoryHelper.toClass2(FactoryHelper.java:182)
        at javassist.util.proxy.FactoryHelper.toClass(FactoryHelper.java:164)
        ... 39 more
Caused by: java.lang.ClassNotFoundException: org.hibernate.proxy.HibernateProxy from [Module "deployment.TestEARApp.ear.TestEJBOne.jar:main" from Service Module Loader]
        at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:190)
        at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:468)
        at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:456)
        at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:398)
        at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:120)
        ... 46 more

• Even if the EAR has the following kind of "META-INF/jboss-deployment-structure.xml" file still the above exception is encountered:

<jboss-deployment-structure xmlns="urn:jboss:deployment-structure:1.1">
    <deployment>
        <dependencies>
            <system export="true">
                <paths>
                    <path name="sun/security/action"/>
                </paths>
            </system>
    <module name="org.apache.commons.collections"/> 
    <module name="org.hibernate.commons-annotations"/> 
    <module name="org.dom4j"/> 
    <module name="org.javassist"/> 
    <module name="org.hibernate"/> 
        </dependencies>
    </deployment>
</jboss-deployment-structure>