On Oracle Weblogic 10.3, the JTA transaction feature causes an exception.

org.jbpm.api.JbpmException: couldn't lookup 'UserTransaction' from jndi: Unable to resolve 'UserTransaction'. Resolved '': Unable to resolve 'UserTran
saction'. Resolved ''
at org.jbpm.pvm.internal.tx.jta.JtaTransaction.lookupFromJndi(JtaTransaction.java:137)
at org.jbpm.pvm.internal.tx.jta.JtaTransaction.lookupJeeUserTransaction(JtaTransaction.java:116)
at org.jbpm.pvm.internal.tx.jta.JtaRetryInterceptor.execute(JtaRetryInterceptor.java:42)
at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.executeInNewEnvironment(EnvironmentInterceptor.java:53)
at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.execute(EnvironmentInterceptor.java:40)
at org.jbpm.pvm.internal.svc.SkipInterceptor.execute(SkipInterceptor.java:43)
at org.jbpm.pvm.internal.cfg.ProcessEngineImpl.checkDb(ProcessEngineImpl.java:177)
at org.jbpm.pvm.internal.cfg.ProcessEngineImpl.buildProcessEngine(ProcessEngineImpl.java:170)
...

Default Weblogic JNDI reference = 'javax.transaction.UserTransaction' but jBPM 4.2 only support standard JEE specs ('UserTransaction').

With, jBPM 3.3, it's possible to override the jndi name value as a property in the jbpm hibernate config file (<property name="jta.UserTransaction">java:comp/UserTransaction</property>).
Ref : http://docs.jboss.org/jbpm/v3/userguide/deployment.html

I am not sure that jBPM 4.2 implements that solution.
I also know that "JTA Transactions" is in Incubation and is not documented in Developers Guide and that app-servers ohter than jBOSS are not assumed to be supported.

Does a actual solution or work-around exist for that problem with released 4.2 version ?