This behavior is not related to the type of deployments(War/EAR). As suggested in PDN we can very well ignore it as DNODE and VBD listeners are not used any more for any functionality. And in later versions they have been removed as well.
Can someone please answer to below query.
If both are not required/ignore then how VBD services Sync with other nodes and how real time Decisioning happens in NBA.
***Edited by Moderator Marissa to update SR Details***
Since 7.2.1, we use a single agent to bootstrap all Decisioning services (DDS, Data Flows, VBD, etc) instead of the Listener per service model from 7.2. This change did not affect the functionality of the individual services, only how they are managed.