diff --git a/server.go b/server.go
index 27c5da9..8560463 100644
--- a/server.go
+++ b/server.go
@@ -6,7 +6,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"math"
 	"net"
 	"net/http"
 	"net/url"
@@ -75,8 +74,6 @@ func healthCheckHandler(w http.ResponseWriter, r *http.Request) {
 	if t := atomic.AddInt64(&healthcheckcounter, 1); t < 0 {
 		logger.Println("healthCheckHandler return StatusServiceUnavailable :", t)
 		w.WriteHeader(http.StatusServiceUnavailable)
-	} else {
-		logger.Println("healthCheckHandler return StatusOK :", t)
 	}
 }
 
@@ -133,10 +130,9 @@ func (server *Server) shutdown() {
 	if t := atomic.LoadInt64(&healthcheckcounter); t > 0 {
 		logger.Println("http server shutdown. healthcheckcounter :", t)
 
-		t = math.MinInt64
-		atomic.StoreInt64(&healthcheckcounter, t)
-		for ; t-math.MinInt64 > 0; t = atomic.LoadInt64(&healthcheckcounter) {
-			logger.Println("    waiting for healthcheckcounter increase y lb", t-math.MinInt64)
+		atomic.StoreInt64(&healthcheckcounter, -100000000)
+		for t = -100000000; t+100000000 < 10; t = atomic.LoadInt64(&healthcheckcounter) {
+			logger.Println("    waiting for healthcheckcounter increase y lb", t+100000000)
 			time.Sleep(100 * time.Millisecond)
 		}
 		logger.Println("http server shutdown. healthcheck completed")