Setting up AWS EC2 Network Load Balancer


I’m trying to setup an EC2 Network type Load Balancer in front of my three Crate.IO EC2 Instances.
My Java Service connects via JDBC (port 5432), so naturally I’ve added that port into the Health Check of the Target Group, but the Health Check is failing.
I’ve also tried to have my forwarding go to TCP 5432, but the Health Checks to go to HTTP 4200, but that doesn’t work either.
The strange thing is, everything works just fine when I setup the “Classic” type Load Balancer, the Health Check to TCP:5432 is working just fine.

Any Ideas?