org.springframework.beans.factory.BeanCurrentlyInCreationException:
Error creating bean with name 'repositoryService': Requested bean
is currently in creation: Is there an unresolvable circular
reference?

The problem is that rather than having to declare all of jBPM’s services in your application context — like it used to be up to jBPM 4.2 —, the new spring integration provides access to them through the Process Engine. All you need in your application context is this:

<bean id="springHelper">
  <property name="jbpmCfg" value="PATH TO YOUR jbpm.cfg.xml">
</property>
</bean>
<bean id="processEngine" factory-bean="springHelper"
factory-method="createProcessEngine" />

Now you can inject the processEngine into your classes and retrieve jBPM’s services like this:

processEngine.getExecutionService() …
processEngine.getRepositoryService() …
…