diff --git a/servlet/auth-servlet.go b/servlet/auth-servlet.go
index 0014dfe..6dc765b 100644
--- a/servlet/auth-servlet.go
+++ b/servlet/auth-servlet.go
@@ -78,7 +78,7 @@ func (s *AuthServlets) Handshake(servletCtx server.ServletCtx, ctx *fasthttp.Req
 	case ocnc.HTTPRequestHeaderValue_NoAuthProbe_Method_Regist:
 		bInfo := ctx.Request.Header.Peek(ocnc.HTTPRequestHeaderKey_NoAuthProbe_Info)
 		if nil == bInfo {
-			return nil, fmt.Errorf("Unexpected HTTPRequestHeaderKey NoAuthProbe Info")
+			return nil, fmt.Errorf("Unexpected Request Header Key NoAuthProbe Info")
 		}
 		rJSON := make([]byte, base64.StdEncoding.DecodedLen(len(bInfo)))
 		_, err := base64.StdEncoding.Decode(rJSON, bInfo)
@@ -122,7 +122,7 @@ func (s *AuthServlets) Handshake(servletCtx server.ServletCtx, ctx *fasthttp.Req
 		return nil, nil
 
 	default:
-		return nil, fmt.Errorf("Unexpected noauth probe httpRequestHeaderValue: %v", method)
+		return nil, fmt.Errorf("Unexpected noauth probe method: %s", method)
 	}
 }
 
diff --git a/servlet/data-servlet.go b/servlet/data-servlet.go
index a9e4ec3..2066ea6 100644
--- a/servlet/data-servlet.go
+++ b/servlet/data-servlet.go
@@ -1,20 +1,20 @@
 package servlet
 
 import (
-	"fmt"
-	"encoding/json"
 	"context"
 	"crypto/rsa"
+	"encoding/json"
+	"fmt"
 	"sync"
 
 	"github.com/valyala/fasthttp"
 
 	"git.loafle.net/commons/server-go"
 	"git.loafle.net/commons/server-go/socket"
-	"git.loafle.net/overflow/gateway/external/grpc"
-	og "git.loafle.net/overflow/gateway"
 	ocpc "git.loafle.net/overflow/commons-go/probe/constants"
 	ocpm "git.loafle.net/overflow/commons-go/probe/model"
+	og "git.loafle.net/overflow/gateway"
+	"git.loafle.net/overflow/gateway/external/grpc"
 	ogrs "git.loafle.net/overflow/gateway_rpc/servlet"
 )
 
@@ -69,7 +69,7 @@ func (s *DataServlets) Handshake(servletCtx server.ServletCtx, ctx *fasthttp.Req
 	switch method {
 	case ocpc.HTTPRequestHeaderValue_Probe_Method_Connect:
 	default:
-		return nil, fmt.Errorf("Unexpected noauth probe httpRequestHeaderValue: %v", method)
+		return nil, fmt.Errorf("Unexpected probe method: %s", method)
 	}
 
 	bProbeKey := ctx.Request.Header.Peek(ocpc.HTTPRequestHeaderKey_Probe_ProbeKey)
@@ -107,4 +107,4 @@ func (s *DataServlets) OnConnect(servletCtx server.ServletCtx, conn socket.Conn)
 
 func (s *DataServlets) OnDisconnect(servletCtx server.ServletCtx) {
 	s.RPCServlets.OnDisconnect(servletCtx)
-}
\ No newline at end of file
+}
diff --git a/servlet/probe-servlet.go b/servlet/probe-servlet.go
index 47f06ab..16a82f4 100644
--- a/servlet/probe-servlet.go
+++ b/servlet/probe-servlet.go
@@ -75,7 +75,7 @@ func (s *ProbeServlets) Handshake(servletCtx server.ServletCtx, ctx *fasthttp.Re
 	switch method {
 	case ocpc.HTTPRequestHeaderValue_Probe_Method_Connect:
 	default:
-		return nil, fmt.Errorf("Unexpected noauth probe httpRequestHeaderValue: %v", method)
+		return nil, fmt.Errorf("Unexpected probe method: %s", method)
 	}
 
 	bProbeKey := ctx.Request.Header.Peek(ocpc.HTTPRequestHeaderKey_Probe_ProbeKey)