I have added a property that identifies the interface that extends my ControllerService :
static final PropertyDescriptor CACHE_SINK = new PropertyDescriptor.Builder()
.description("Specifies the Controller Service to use for performing cache tasks")
Now I place my nifi-transformMapper-nar file as well inside the lib folder.
In nifi, I am able to create the controller service, but it doesn't allow me to choose that same controller service in my custom processor:
My objective is to use the same instance of the controller service in both the processors.