diff --git a/net/gtcp/gtcp_server.go b/net/gtcp/gtcp_server.go
index 87c263447..9607a53fe 100644
--- a/net/gtcp/gtcp_server.go
+++ b/net/gtcp/gtcp_server.go
@@ -52,7 +52,7 @@ func NewServer(address string, handler func(*Conn), name ...string) *Server {
 		address: address,
 		handler: handler,
 	}
-	if len(name) > 0 {
+	if len(name) > 0 && name[0] != "" {
 		serverMapping.Set(name[0], s)
 	}
 	return s
diff --git a/net/gtcp/gtcp_unit_pool_test.go b/net/gtcp/gtcp_unit_pool_test.go
index 08840457d..3cbaea6fe 100644
--- a/net/gtcp/gtcp_unit_pool_test.go
+++ b/net/gtcp/gtcp_unit_pool_test.go
@@ -27,7 +27,9 @@ func Test_Pool_Basic1(t *testing.T) {
 		}
 	})
 	go s.Run()
-	defer s.Close()
+	defer func() {
+		s.Close()
+	}()
 	time.Sleep(100 * time.Millisecond)
 	gtest.Case(t, func() {
 		conn, err := gtcp.NewPoolConn(fmt.Sprintf("127.0.0.1:%d", p))
@@ -47,7 +49,9 @@ func Test_Pool_Basic2(t *testing.T) {
 		conn.Close()
 	})
 	go s.Run()
-	defer s.Close()
+	defer func() {
+		s.Close()
+	}()
 	time.Sleep(100 * time.Millisecond)
 	gtest.Case(t, func() {
 		conn, err := gtcp.NewPoolConn(fmt.Sprintf("127.0.0.1:%d", p))
diff --git a/net/gudp/gudp_conn.go b/net/gudp/gudp_conn.go
index cfc276655..31b1534a6 100644
--- a/net/gudp/gudp_conn.go
+++ b/net/gudp/gudp_conn.go
@@ -154,7 +154,7 @@ func (c *Conn) Recv(length int, retry ...Retry) ([]byte, error) {
 				if retry[0].Interval == 0 {
 					retry[0].Interval = gDEFAULT_RETRY_INTERVAL
 				}
-				time.Sleep(time.Duration(retry[0].Interval) * time.Millisecond)
+				time.Sleep(retry[0].Interval)
 				continue
 			}
 			break
diff --git a/net/gudp/gudp_server.go b/net/gudp/gudp_server.go
index 921ea3f87..2ecb28a76 100644
--- a/net/gudp/gudp_server.go
+++ b/net/gudp/gudp_server.go
@@ -53,7 +53,7 @@ func NewServer(address string, handler func(*Conn), name ...string) *Server {
 		address: address,
 		handler: handler,
 	}
-	if len(name) > 0 {
+	if len(name) > 0 && name[0] != "" {
 		serverMapping.Set(name[0], s)
 	}
 	return s