Headless service can't comunicate after installed

[kittisuw]

version: stable-2.11.4
As I read https://linkerd.io/2018/11/14/grpc-load-balancing-on-kubernetes-without-tears.
Normally linkerd has support both headless or non-headless. But after I installed and inject deployments using that using grpc with headless service. All services can't communicate. How does it needs more action after installed?

[kleimkuhler]

Hey @kittisuw we'll need a little more information about what is happening and why your services can't communicate. Steps for a reproduction would be helpful as well as logs to get a better ideas about what errors are actually occurring.