diff --git a/remoting/exchange.go b/remoting/exchange.go
index e85e2c8ad1eb7457fb3dfa74047ad490fa059d0d..892bd82013d72b6ec62f87e03143622517070185 100644
--- a/remoting/exchange.go
+++ b/remoting/exchange.go
@@ -48,7 +48,7 @@ type Request struct {
 	ID int64
 	// protocol version
 	Version string
-	// serial ID
+	// serial ID (ignore)
 	SerialID byte
 	// Data
 	Data   interface{}
diff --git a/remoting/getty/getty_client.go b/remoting/getty/getty_client.go
index f264652a407971a3a5dc0365ab7fa2f2a9b30648..aea1bceeb8379d5fc896606abc0ce0dabdd1e876 100644
--- a/remoting/getty/getty_client.go
+++ b/remoting/getty/getty_client.go
@@ -154,7 +154,9 @@ func (c *Client) Connect(url common.URL) error {
 	c.codec = remoting.GetCodec(url.Protocol)
 	c.addr = url.Location
 	_, _, err := c.selectSession(c.addr)
-	logger.Errorf("try to connect server %v failed for : %v", url.Location, err)
+	if err != nil {
+		logger.Errorf("try to connect server %v failed for : %v", url.Location, err)
+	}
 	return err
 }
 
@@ -174,7 +176,7 @@ func (c *Client) Request(request *remoting.Request, timeout time.Duration, respo
 	//	session getty.Session
 	//	conn    *gettyRPCClient
 	//)
-	conn, session, err := c.selectSession(c.addr)
+	_, session, err := c.selectSession(c.addr)
 	if err != nil {
 		return perrors.WithStack(err)
 	}