We have an Asynchronous REST Service which uses a Request Processor of standard class.

We can trace the service and see logs for "Inbound Map Begin", "Inbound Map End" as well as see the SQL calls to insert the requests to table pr_sys_queue_execreq_svc.

What is the Activity(or any other process) name that handles the incoming request and execute the above steps?

I have been all over the tracers, Pega literature and manuals, google posts and coworkers, no one seems to know. We need to override this activity to take some metrics due to some performance issues we are having.

For example, when you connect to a REST service using a connector, the activity being executed is pyInvokeRESTConnector.