When an application uses a transaction with the UserTransaction to perform state changes the server throws a NullPointerException.
This occurs when UserTransaction.begin() is called.

The cause is the TransactionSynchronization object has not been associated with the TransactionManager before the call to begin().

Included with this issue is a patch for org.jboss.jca.core.connectionmanager.ConnectionManagerFactory. The patch adds initialization code when the factory creates a transactional (versus a nonTransactional) ConnectionManager.