From 80bd4c598da9586754a2c5cd814f666492131ce6 Mon Sep 17 00:00:00 2001
From: yangzhouhan <yangzhouhan@gmail.com>
Date: Thu, 13 Aug 2015 18:32:39 -0700
Subject: [PATCH] add a comment

---
 health/health.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/health/health.go b/health/health.go
index 568065e3..7930bde7 100644
--- a/health/health.go
+++ b/health/health.go
@@ -27,6 +27,7 @@ func (s *HealthServer) Check(ctx context.Context, in *healthpb.HealthCheckReques
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	if in.Service == "" {
+		// check the server overall health status.
 		return &healthpb.HealthCheckResponse{
 			Status: healthpb.HealthCheckResponse_SERVING,
 		}, nil