I am unable to join secondary vRA appliance in vRA cluster in distributed deployment.
i have followed this blog https://www.definit.co.uk/2017/07/vrealize-automation-7-3-distributed-install-prerequisites/
using NSX loadbalancers.
Um, ok. But what about your environment? It looks like you're using the installer wizard to join this second node, correct? What does your load balancer configuration look like? What is the architecture here of the vRA stack? Once again, need more details.