diff --git a/client.go b/client.go
index 66b172b..969595e 100644
--- a/client.go
+++ b/client.go
@@ -42,6 +42,7 @@ type ClientCommon struct {
 	heartbeatPeriod            time.Duration
 	wg                         stario.WaitGroup
 	netType                    NetType
+	showError                  bool
 	skipKeyExchange            bool
 	useHeartBeat               bool
 	sequenceDe                 func([]byte) (interface{}, error)
@@ -201,6 +202,12 @@ func (c *ClientCommon) Heartbeat() {
 	}
 }
 
+func (c *ClientCommon) ShowError(std bool) {
+	c.mu.Lock()
+	c.showError = std
+	c.mu.Unlock()
+}
+
 func (c *ClientCommon) readMessage() {
 	for {
 		select {
@@ -221,7 +228,9 @@ func (c *ClientCommon) readMessage() {
 			continue
 		}
 		if err != nil {
-			fmt.Println("client read error", err)
+			if c.showError {
+				fmt.Println("client read error", err)
+			}
 			c.alive.Store(false)
 			c.mu.Lock()
 			c.status = Status{
@@ -269,7 +278,9 @@ func (c *ClientCommon) loadMessage() {
 				//transfer to Msg
 				msg, err := c.sequenceDe(c.msgDe(c.SecretKey, data.Msg))
 				if err != nil {
-					fmt.Println("client decode data error", err)
+					if c.showError {
+						fmt.Println("client decode data error", err)
+					}
 					return
 				}
 				message := Message{
@@ -399,6 +410,8 @@ func (c *ClientCommon) sendWait(msg TransferMsg, timeout time.Duration) (Message
 		close(data.Reply)
 		c.noFinSyncMsgPool.Delete(data.TransferMsg.ID)
 		return Message{}, os.ErrDeadlineExceeded
+	case <-c.stopCtx.Done():
+		return Message{}, errors.New("Service shutdown")
 	case msg, ok := <-data.Reply:
 		if !ok {
 			return msg, os.ErrInvalid
@@ -420,6 +433,8 @@ func (c *ClientCommon) sendCtx(msg TransferMsg, ctx context.Context) (Message, e
 		close(data.Reply)
 		c.noFinSyncMsgPool.Delete(data.TransferMsg.ID)
 		return Message{}, os.ErrDeadlineExceeded
+	case <-c.stopCtx.Done():
+		return Message{}, errors.New("Service shutdown")
 	case msg, ok := <-data.Reply:
 		if !ok {
 			return msg, os.ErrInvalid
diff --git a/clienttype.go b/clienttype.go
index a4042a4..47e8c98 100644
--- a/clienttype.go
+++ b/clienttype.go
@@ -38,6 +38,7 @@ type Client interface {
 	Stop() error
 	StopMonitorChan() <-chan struct{}
 	Status() Status
+	ShowError(bool)
 
 	GetSequenceEn() func(interface{}) ([]byte, error)
 	SetSequenceEn(func(interface{}) ([]byte, error))
diff --git a/server.go b/server.go
index 5e21b04..966d94f 100644
--- a/server.go
+++ b/server.go
@@ -41,6 +41,7 @@ type ServerCommon struct {
 	maxHeartbeatLostSeconds    int64
 	sequenceDe                 func([]byte) (interface{}, error)
 	sequenceEn                 func(interface{}) ([]byte, error)
+	showError                  bool
 }
 
 func NewServer() Server {
@@ -64,6 +65,11 @@ func NewServer() Server {
 	}
 	return &server
 }
+func (s *ServerCommon) ShowError(std bool) {
+	s.mu.Lock()
+	s.showError = std
+	s.mu.Unlock()
+}
 
 func (s *ServerCommon) Stop() error {
 	if !s.alive.Load().(bool) {
@@ -184,7 +190,9 @@ func (s *ServerCommon) acceptTU() {
 		}
 		conn, err := s.listener.Accept()
 		if err != nil {
-			fmt.Println("error accept:", err)
+			if s.showError {
+				fmt.Println("error accept:", err)
+			}
 			continue
 		}
 		var id string
@@ -274,7 +282,9 @@ func (s *ServerCommon) loadMessage() {
 				//fmt.Println("received:", float64(time.Now().UnixNano()-nowd)/1000000)
 				msg, err := s.sequenceDe(cc.msgDe(cc.SecretKey, data.Msg))
 				if err != nil {
-					fmt.Println("server decode data error", err)
+					if s.showError {
+						fmt.Println("server decode data error", err)
+					}
 					return
 				}
 				//fmt.Println("decoded:", float64(time.Now().UnixNano()-nowd)/1000000)
@@ -405,6 +415,8 @@ func (s *ServerCommon) sendWait(c *ClientConn, msg TransferMsg, timeout time.Dur
 		close(data.Reply)
 		s.noFinSyncMsgPool.Delete(data.TransferMsg.ID)
 		return Message{}, os.ErrDeadlineExceeded
+	case <-s.stopCtx.Done():
+		return Message{}, errors.New("Service shutdown")
 	case msg, ok := <-data.Reply:
 		if !ok {
 			return msg, os.ErrInvalid
@@ -434,6 +446,8 @@ func (s *ServerCommon) sendCtx(c *ClientConn, msg TransferMsg, ctx context.Conte
 		close(data.Reply)
 		s.noFinSyncMsgPool.Delete(data.TransferMsg.ID)
 		return Message{}, os.ErrClosed
+	case <-s.stopCtx.Done():
+		return Message{}, errors.New("Service shutdown")
 	case msg, ok := <-data.Reply:
 		if !ok {
 			return msg, os.ErrInvalid
diff --git a/servertype.go b/servertype.go
index 5a947e7..b9262d6 100644
--- a/servertype.go
+++ b/servertype.go
@@ -40,6 +40,7 @@ type Server interface {
 	SetSequenceEn(func(interface{}) ([]byte, error))
 	GetSequenceDe() func([]byte) (interface{}, error)
 	SetSequenceDe(func([]byte) (interface{}, error))
+	ShowError(bool)
 
 	HeartbeatTimeoutSec() int64
 	SetHeartbeatTimeoutSec(int64)