Problemas com DataSource no JBoss5.1GA e Oracle 11g

Olá pessoal!

Estou utilizando um segundo xa-datasource no JBoss 5.1GA com o Oracle 11g.
Em desenvolvimento, tudo funciona perfeitamente, mas quando aponto o datasource para homologação, ele me dá a excessão:


09:57:47,082 WARN  [JBossManagedConnectionPool] Throwable while attempting to get a new connection: null
org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (java.sql.SQLException: falha ao fazer marshall de OAUTH)
	at org.jboss.resource.adapter.jdbc.xa.XAManagedConnectionFactory.getXAManagedConnection(XAManagedConnectionFactory.java:465)
	at org.jboss.resource.adapter.jdbc.xa.XAManagedConnectionFactory.createManagedConnection(XAManagedConnectionFactory.java:409)
	at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.createConnectionEventListener(InternalManagedConnectionPool.java:633)
	at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.getConnection(InternalManagedConnectionPool.java:267)
	at org.jboss.resource.connectionmanager.JBossManagedConnectionPool$BasePool.getConnection(JBossManagedConnectionPool.java:622)
	at org.jboss.resource.connectionmanager.BaseConnectionManager2.getManagedConnection(BaseConnectionManager2.java:404)
	at org.jboss.resource.connectionmanager.TxConnectionManager.getManagedConnection(TxConnectionManager.java:381)
	at org.jboss.resource.connectionmanager.BaseConnectionManager2.allocateConnection(BaseConnectionManager2.java:496)
	at org.jboss.resource.connectionmanager.BaseConnectionManager2$ConnectionManagerProxy.allocateConnection(BaseConnectionManager2.java:941)
	at org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:104)
	at org.hibernate.ejb.connection.InjectedDataSourceConnectionProvider.getConnection(InjectedDataSourceConnectionProvider.java:43)
	at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:111)
	at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2101)
	at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1325)
	at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:867)
	at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:669)
	at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:132)
	at org.jboss.jpa.deployment.PersistenceUnitDeployment.start(PersistenceUnitDeployment.java:301)
	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:597)
	at org.jboss.reflect.plugins.introspection.ReflectionUtils.invoke(ReflectionUtils.java:59)
	at org.jboss.reflect.plugins.introspection.ReflectMethodInfoImpl.invoke(ReflectMethodInfoImpl.java:150)
	at org.jboss.joinpoint.plugins.BasicMethodJoinPoint.dispatch(BasicMethodJoinPoint.java:66)
	at org.jboss.kernel.plugins.dependency.KernelControllerContextAction$JoinpointDispatchWrapper.execute(KernelControllerContextAction.java:241)
	at org.jboss.kernel.plugins.dependency.ExecutionWrapper.execute(ExecutionWrapper.java:47)
	at org.jboss.kernel.plugins.dependency.KernelControllerContextAction.dispatchExecutionWrapper(KernelControllerContextAction.java:109)
	at org.jboss.kernel.plugins.dependency.KernelControllerContextAction.dispatchJoinPoint(KernelControllerContextAction.java:70)
	at org.jboss.kernel.plugins.dependency.LifecycleAction.installActionInternal(LifecycleAction.java:221)
	at org.jboss.kernel.plugins.dependency.InstallsAwareAction.installAction(InstallsAwareAction.java:54)
	at org.jboss.kernel.plugins.dependency.InstallsAwareAction.installAction(InstallsAwareAction.java:42)
	at org.jboss.dependency.plugins.action.SimpleControllerContextAction.simpleInstallAction(SimpleControllerContextAction.java:62)
	at org.jboss.dependency.plugins.action.AccessControllerContextAction.install(AccessControllerContextAction.java:71)
	at org.jboss.dependency.plugins.AbstractControllerContextActions.install(AbstractControllerContextActions.java:51)
	at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)
	at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1631)
	at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934)
	at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082)
	at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
	at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:774)
	at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:540)
	at org.jboss.deployers.vfs.deployer.kernel.BeanMetaDataDeployer.deploy(BeanMetaDataDeployer.java:121)
	at org.jboss.deployers.vfs.deployer.kernel.BeanMetaDataDeployer.deploy(BeanMetaDataDeployer.java:51)
	at org.jboss.deployers.spi.deployer.helpers.AbstractSimpleRealDeployer.internalDeploy(AbstractSimpleRealDeployer.java:62)
	at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy(AbstractRealDeployer.java:50)
	at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:171)
	at org.jboss.deployers.plugins.deployers.DeployersImpl.doDeploy(DeployersImpl.java:1439)
	at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1157)
	at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1178)
	at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1210)
	at org.jboss.deployers.plugins.deployers.DeployersImpl.install(DeployersImpl.java:1098)
	at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)
	at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1631)
	at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934)
	at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082)
	at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
	at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822)
	at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553)
	at org.jboss.deployers.plugins.deployers.DeployersImpl.process(DeployersImpl.java:781)
	at org.jboss.deployers.plugins.main.MainDeployerImpl.process(MainDeployerImpl.java:702)
	at org.jboss.system.server.profileservice.repository.MainDeployerAdapter.process(MainDeployerAdapter.java:117)
	at org.jboss.system.server.profileservice.repository.ProfileDeployAction.install(ProfileDeployAction.java:70)
	at org.jboss.system.server.profileservice.repository.AbstractProfileAction.install(AbstractProfileAction.java:53)
	at org.jboss.system.server.profileservice.repository.AbstractProfileService.install(AbstractProfileService.java:361)
	at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)
	at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1631)
	at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934)
	at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082)
	at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
	at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822)
	at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553)
	at org.jboss.system.server.profileservice.repository.AbstractProfileService.activateProfile(AbstractProfileService.java:306)
	at org.jboss.system.server.profileservice.ProfileServiceBootstrap.start(ProfileServiceBootstrap.java:271)
	at org.jboss.bootstrap.AbstractServerImpl.start(AbstractServerImpl.java:461)
	at org.jboss.Main.boot(Main.java:221)
	at org.jboss.Main$1.run(Main.java:556)
	at java.lang.Thread.run(Thread.java:619)
Caused by: java.sql.SQLException: falha ao fazer marshall de OAUTH
	at oracle.jdbc.driver.T4CTTIoauthenticate.doOAUTH(T4CTTIoauthenticate.java:709)
	at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:386)
	at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:535)
	at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:218)
	at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:29)
	at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:528)
	at oracle.jdbc.pool.OracleDataSource.getPhysicalConnection(OracleDataSource.java:401)
	at oracle.jdbc.xa.client.OracleXADataSource.getPooledConnection(OracleXADataSource.java:679)
	at oracle.jdbc.xa.client.OracleXADataSource.getXAConnection(OracleXADataSource.java:243)
	at oracle.jdbc.xa.client.OracleXADataSource.getXAConnection(OracleXADataSource.java:184)
	at org.jboss.resource.adapter.jdbc.xa.XAManagedConnectionFactory.getXAManagedConnection(XAManagedConnectionFactory.java:449)
	... 77 more

DataSource:


	<xa-datasource>
		<jndi-name>MEUBANCO</jndi-name>
		<xa-datasource-class>oracle.jdbc.xa.client.OracleXADataSource</xa-datasource-class>
		<xa-datasource-property name="URL">jdbc:oracle:thin:@192.168.0.10:1531:instancia</xa-datasource-property>
		<xa-datasource-property name="User">user</xa-datasource-property>
		<xa-datasource-property name="Password">password</xa-datasource-property>
		<track-connection-by-tx>true</track-connection-by-tx> 
		<isSameRM-override-value>false</isSameRM-override-value>
		<valid-connection-checker-class-name>org.jboss.resource.adapter.jdbc.vendor.OracleValidConnectionChecker</valid-connection-checker-class-name>
		<exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.OracleExceptionSorter</exception-sorter-class-name>
		<no-tx-separate-pools/>
	</xa-datasource>
	<mbean code="org.jboss.resource.adapter.jdbc.vendor.OracleXAExceptionFormatter"  name="jboss.jca:service=OracleXAExceptionFormatter">
		<depends optional-attribute-name="TransactionManagerService">jboss:service=TransactionManager</depends>
	</mbean>

De acordo com o DBA, os banco estão iguais e não está sendo utilizado nenhum protocolo de autenticação.
Eu estava utilizando a versão anterior do driver JDBC (ojdbc14.jar) e ele acusava usuário ou senha inválidos. Ao trocar para o driver que vem na instalação do Oracle (ojdbc6.jar) ele mudou a excessão para a descrita acima.
Alguém já se deparou com um problema parecido?
Estou achando que pode ser a versão ou falta (JBossResourceException) de uma library de autenticação (Open Authorization) - talvez por isso ele não consiga fazer o marshall…
Alguém se habilita?

Valeu!