Transaction is not being shared by different operations within the same thread

When injecting a JPA-based PartitionManager configuration in a EJB as follows:

    @Resource(mappedName = "picketlink/JPADSBasedPartitionManager")
    private PartitionManager jpaDSBasedPartitionManager;

The IDM operations are executed without share the same EntityManager instance. This causes some strange behaviors such as not being able to retrieve data stored from a previous operation during a method execution.