Scenario: We have a custom Controller Service which was deprecated in favor of its replacement (also custom.) The original CS extends the new CS, and contains just a single method: customValidate. This remained intact to log a message saying "Don't use me.. use the new one."
When NiFi was re-started with the new service/deprecated old service, predictably, the log showed the above message. But, it was appearing constantly at 5 second intervals. Even when the controller service was removed from the flow entirely, the messages originating from customValidate continued every 5 seconds. Why is validation of a Controller Service - especially one which no longer exists - occurring periodically? Shouldn't it only occur when its properties change and/or it is enabled?
