diff --git a/code/client/app/app.go b/code/client/app/app.go
index 84f04f7..b940dcc 100644
--- a/code/client/app/app.go
+++ b/code/client/app/app.go
@@ -1,6 +1,7 @@
 package app
 
 import (
+	"os"
 	rt "runtime"
 
 	"github.com/kardianos/service"
@@ -105,9 +106,14 @@ func (a *App) run() {
 	}()
 
 	if a.cfg.DashboardEnabled {
+		go func() {
+			a.conn.Wait()
+			logging.Flush()
+			os.Exit(1)
+		}()
 		db := dashboard.New(a.cfg, a.conn, mgr, a.version)
 		runtime.Assert(db.ListenAndServe(a.cfg.DashboardListen, a.cfg.DashboardPort))
 	} else {
-		select {}
+		a.conn.Wait()
 	}
 }
diff --git a/code/client/conn/conn.go b/code/client/conn/conn.go
index 8c31b25..b493b6e 100644
--- a/code/client/conn/conn.go
+++ b/code/client/conn/conn.go
@@ -1,6 +1,7 @@
 package conn
 
 import (
+	"context"
 	"crypto/tls"
 	"net"
 	"strings"
@@ -24,6 +25,9 @@ type Conn struct {
 	write       chan *network.Msg
 	lockDrop    sync.RWMutex
 	drop        map[string]time.Time
+	// runtime
+	ctx    context.Context
+	cancel context.CancelFunc
 }
 
 // New new connection
@@ -35,9 +39,8 @@ func New(cfg *global.Configure) *Conn {
 		write:       make(chan *network.Msg, 1024),
 		drop:        make(map[string]time.Time),
 	}
-	var err error
-	conn.conn, err = conn.tryConnect()
-	runtime.Assert(err)
+	runtime.Assert(conn.connect())
+	conn.ctx, conn.cancel = context.WithCancel(context.Background())
 	go conn.loopRead()
 	go conn.loopWrite()
 	go conn.keepalive()
@@ -45,7 +48,7 @@ func New(cfg *global.Configure) *Conn {
 	return conn
 }
 
-func (conn *Conn) connect() (*network.Conn, error) {
+func (conn *Conn) connect() error {
 	var dial net.Conn
 	var err error
 	if conn.cfg.UseSSL {
@@ -55,30 +58,23 @@ func (conn *Conn) connect() (*network.Conn, error) {
 	}
 	if err != nil {
 		logging.Error("dial: %v", err)
-		return nil, err
+		return err
 	}
 	cn := network.NewConn(dial)
 	err = writeHandshake(cn, conn.cfg)
 	if err != nil {
 		logging.Error("write handshake: %v", err)
-		return nil, err
+		return err
 	}
 	logging.Info("%s connected", conn.cfg.Server)
-	return cn, nil
+	conn.conn = cn
+	return nil
 }
 
-func (conn *Conn) tryConnect() (*network.Conn, error) {
-	var ret *network.Conn
-	var err error
-	for i := 0; i < 10; i++ {
-		ret, err = conn.connect()
-		if err == nil {
-			return ret, nil
-		}
-		logging.Error("connect error on %d times: %v", i+1, err)
-		time.Sleep(time.Second)
+func (conn *Conn) close() {
+	if conn.conn != nil {
+		conn.conn.Close()
 	}
-	return nil, err
 }
 
 func writeHandshake(conn *network.Conn, cfg *global.Configure) error {
@@ -96,6 +92,8 @@ func writeHandshake(conn *network.Conn, cfg *global.Configure) error {
 
 func (conn *Conn) loopRead() {
 	defer utils.Recover("loopRead")
+	defer conn.close()
+	defer conn.cancel()
 	var timeout int
 	for {
 		msg, _, err := conn.conn.ReadMessage(conn.cfg.ReadTimeout)
@@ -104,16 +102,11 @@ func (conn *Conn) loopRead() {
 				timeout++
 				if timeout >= 60 {
 					logging.Error("too many timeout times")
-					conn.conn, err = conn.tryConnect()
-					runtime.Assert(err)
-					timeout = 0
-					continue
+					return
 				}
 				continue
 			}
 			logging.Error("read message: %v", err)
-			conn.conn, err = conn.tryConnect()
-			runtime.Assert(err)
 			continue
 		}
 		timeout = 0
@@ -142,21 +135,28 @@ func (conn *Conn) loopRead() {
 			conn.lockDrop.Lock()
 			conn.drop[msg.GetLinkId()] = time.Now().Add(time.Minute)
 			conn.lockDrop.Unlock()
+		case <-conn.ctx.Done():
+			return
 		}
 	}
 }
 
 func (conn *Conn) loopWrite() {
 	defer utils.Recover("loopWrite")
+	defer conn.close()
+	defer conn.cancel()
 	for {
-		msg := <-conn.write
+		var msg *network.Msg
+		select {
+		case msg = <-conn.write:
+		case <-conn.ctx.Done():
+			return
+		}
 		msg.From = conn.cfg.ID
 		err := conn.conn.WriteMessage(msg, conn.cfg.WriteTimeout)
 		if err != nil {
 			logging.Error("write message error on %s: %v",
 				conn.cfg.ID, err)
-			conn.conn, err = conn.connect()
-			runtime.Assert(err)
 			continue
 		}
 	}
@@ -164,9 +164,16 @@ func (conn *Conn) loopWrite() {
 
 func (conn *Conn) keepalive() {
 	defer utils.Recover("keepalive")
+	defer conn.close()
+	defer conn.cancel()
+	tk := time.NewTicker(10 * time.Second)
 	for {
-		time.Sleep(10 * time.Second)
-		conn.SendKeepalive()
+		select {
+		case <-tk.C:
+			conn.SendKeepalive()
+		case <-conn.ctx.Done():
+			return
+		}
 	}
 }
 
@@ -220,3 +227,8 @@ func (conn *Conn) checkDrop() {
 		conn.lockDrop.Unlock()
 	}
 }
+
+// Wait wait for connection closed
+func (conn *Conn) Wait() {
+	<-conn.ctx.Done()
+}