diff --git a/client/client.go b/client/client.go
index b69cfa2..2d37a30 100644
--- a/client/client.go
+++ b/client/client.go
@@ -32,6 +32,7 @@ import (
 
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials/insecure"
+	"google.golang.org/grpc/status"
 )
 
 type runcommand struct {
@@ -716,7 +717,9 @@ func (hc *houstonClient) Start() {
 			if client != nil {
 				err := hc.checkOperation(client)
 				if err != nil {
-					logger.Println("grpc.DialContext hc.checkOperation failed :", err)
+					if status.Convert(err).Message() != status.Convert(context.Canceled).Message() {
+						logger.Println("grpc.DialContext hc.checkOperation failed :", err)
+					}
 					client = nil
 				}
 			}
diff --git a/main_client.go b/main_client.go
index d83d1a5..b37ab82 100644
--- a/main_client.go
+++ b/main_client.go
@@ -27,10 +27,7 @@ func main() {
 
 	go func() {
 		logger.Println("listen /metrics")
-		err := server.ListenAndServe()
-		if err != nil {
-			logger.Error(err)
-		}
+		server.ListenAndServe()
 	}()
 
 	hc.Start()