LazyInitializationException when getting process variables which extends VariableEntity

When KJAR is configured with pluggable persistence (i.e. JPAPlaceholderResolverStrategy) and there are hibernate Entities in the project which extends org.drools.persistence.jpa.marshaller.VariableEntity, the marshalling fails when I try to obtain the list of process variables via kie-server-client (getProcessInstanceVariables method)

This can be solved by adding following configuration into persistence.xml of the KJAR:

            <property name="hibernate.enable_lazy_load_no_trans" value="true"/>

But more suitable solution would be the code change in the server side, so the MappedVariables set would be eagerly loaded.