Are you able to connect to the gRPC server (a) from the host on which you're running the gRPC server? (b) from the host on which you're running the gRPC client using a known-good gRPC client such as gRPCurl?
https://github.com/fullstorydev/grpcurl -- You received this message because you are subscribed to the Google Groups "grpc.io" group. To unsubscribe from this group and stop receiving emails from it, send an email to grpc-io+unsubscr...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/grpc-io/d4d2fe2b-3ef4-4649-877f-8bc01830e793n%40googlegroups.com.