diff --git a/app/lal/config.go b/app/lal/config.go
index a340dc7..e579393 100644
--- a/app/lal/config.go
+++ b/app/lal/config.go
@@ -6,12 +6,12 @@ import (
 )
 
 type Config struct {
-	SubIdleTimeout int64 `json:"sub_idle_timeout"`
-	GOPCacheNum    int   `json:"gop_cache_number"`
+	RTMP RTMP `json:"rtmp"`
 
-	HTTPFlv HTTPFlv `json:"httpflv"`
-	RTMP    RTMP    `json:"rtmp"`
-	Pull    Pull    `json:"pull"`
+	SubIdleTimeout int64   `json:"sub_idle_timeout"`
+	GOPCacheNum    int     `json:"gop_cache_number"`
+	HTTPFlv        HTTPFlv `json:"httpflv"`
+	Pull           Pull    `json:"pull"`
 }
 
 type HTTPFlv struct {
diff --git a/app/lal/main.go b/app/lal/main.go
index 8fc72f8..4c094ff 100644
--- a/app/lal/main.go
+++ b/app/lal/main.go
@@ -8,7 +8,8 @@ import (
 	"net/http"
 	_ "net/http/pprof"
 	"os"
-	"time"
+	"os/signal"
+	"syscall"
 )
 
 var sm *ServerManager
@@ -20,11 +21,11 @@ func main() {
 	config := loadConf(confFile)
 
 	sm = NewServerManager(config)
-	go sm.RunLoop()
 
-	//shutdownAfter(60 * time.Second)
+	go runWebPProf()
+	go runSignalHandler()
 
-	startWebPProf()
+	sm.RunLoop()
 }
 
 func parseFlag() string {
@@ -67,18 +68,18 @@ func loadConf(confFile string) *Config {
 	return config
 }
 
-func startWebPProf() {
+func runWebPProf() {
+	log.Info("start web pprof listen. addr=:10001")
 	if err := http.ListenAndServe("0.0.0.0:10001", nil); err != nil {
 		log.Error(err)
 		return
 	}
-	log.Info("start pprof listen. addr=:10001")
 }
 
-// TODO chef: 添加优雅退出信号处理
-func shutdownAfter(d time.Duration) {
-	go func() {
-		time.Sleep(d)
-		sm.Dispose()
-	}()
+func runSignalHandler() {
+	c := make(chan os.Signal)
+	signal.Notify(c, syscall.SIGUSR1, syscall.SIGUSR2)
+	s := <-c
+	log.Infof("recv signal. s=%+v", s)
+	sm.Dispose()
 }
diff --git a/app/lal/server_manager.go b/app/lal/server_manager.go
index 949dc67..0a848e5 100644
--- a/app/lal/server_manager.go
+++ b/app/lal/server_manager.go
@@ -70,7 +70,9 @@ func (sm *ServerManager) RunLoop() {
 
 func (sm *ServerManager) Dispose() {
 	log.Debug("Dispose manager.")
-	sm.httpFlvServer.Dispose()
+	if sm.httpFlvServer != nil {
+		sm.httpFlvServer.Dispose()
+	}
 	sm.rtmpServer.Dispose()
 	sm.exitChan <- true
 	sm.mutex.Lock()
diff --git a/pkg/aac/aac_test.go b/pkg/aac/aac_test.go
index ea1137d..e7d6cb5 100644
--- a/pkg/aac/aac_test.go
+++ b/pkg/aac/aac_test.go
@@ -12,4 +12,4 @@ func TestCaptureAAC(t *testing.T) {
 	CaptureAAC(b, []byte{0xaf, 0x1, 0x21, 0x2b, 0x94, 0xa5, 0xb6, 0xa, 0xe1, 0x63, 0x21, 0x88, 0xa2, 0x10, 0x4b, 0xdf, 0x9, 0x25, 0xb4, 0xd6, 0xe3, 0x4a, 0xd, 0xe3, 0xa3, 0x64, 0x8d, 0x1, 0x31, 0x80, 0x98, 0x8b, 0xdc, 0x79, 0x3e, 0x2d, 0xd8, 0xed, 0x68, 0xe0, 0xe5, 0xb2, 0x44, 0x13, 0x4, 0x53, 0xbf, 0x28, 0x92, 0xe5, 0xfa, 0x7d, 0x86, 0x78, 0x40, 0x78, 0x4c, 0xb5, 0xe, 0x15, 0x21, 0xc3, 0x57, 0x1a, 0x63, 0x8d, 0xe, 0xc, 0x69, 0xb5, 0x91, 0xd0, 0x52, 0xe, 0x1, 0xa8, 0x67, 0x3e, 0xf9, 0x4e, 0xa2, 0xdb, 0x8b, 0x4a, 0x52, 0x4a, 0xd0, 0x7d, 0x34, 0x4, 0x4f, 0x8d, 0x11, 0xd3, 0xd, 0x20, 0x98, 0x55, 0x86, 0x9, 0xfb, 0xe5, 0xdd, 0x28, 0xd9, 0x4c, 0xde, 0x40, 0x89, 0x26, 0x0, 0xd4, 0x14, 0xcb, 0x6a, 0xc5, 0x91, 0x48, 0xb5, 0xcf, 0x20, 0x6b, 0xbb, 0x16, 0x1b, 0x6b, 0xf4, 0x65, 0x32, 0x5a, 0x8d, 0x1a, 0xe0, 0xa9, 0xf2, 0xf4, 0x71, 0x7e, 0xb8, 0x6f, 0x93, 0xbc, 0x2, 0xf1, 0x36, 0x2b, 0x4e, 0x96, 0x7f, 0x6d, 0x7c, 0xc5, 0x8a, 0x6e, 0xed, 0x6, 0xa9, 0x7f, 0xbd, 0x97, 0x25, 0xb1, 0xa9, 0xac, 0x70, 0xba, 0x58, 0xd7, 0x31, 0x53, 0x94, 0x5f, 0xa5, 0x8f, 0x74, 0x35, 0xea, 0x64, 0x74, 0x6f, 0x19, 0x94, 0x11, 0x46, 0x99, 0x89, 0x80, 0x1c, 0x8a, 0x22, 0x52, 0xcf, 0x9, 0x43, 0x31, 0xc, 0x48, 0x63, 0x18, 0x25, 0xcf, 0x60, 0xcf, 0xc6, 0x46, 0x74, 0x35, 0xbd, 0xa7, 0x7c, 0x66, 0xaa, 0xf7, 0x97, 0x34, 0x4, 0x12, 0x30, 0x49, 0xae, 0x39, 0xb4, 0xfa, 0x74, 0x58, 0x72, 0x23, 0x8d, 0xdc, 0xaa, 0x58, 0x7c, 0xb5, 0x1c, 0xe9, 0x55, 0xd9, 0x55, 0x8c, 0x4e, 0x51, 0xd4, 0xa8, 0xb4, 0x76, 0x61, 0x55, 0xd0, 0xea, 0x55, 0x39, 0xda, 0x9, 0x1b, 0x52, 0x79, 0xbd, 0x8d, 0xff, 0xb8, 0xcb, 0xa0, 0xf4, 0xc2, 0xe3, 0xfc, 0x87, 0x80, 0x6c, 0xa8, 0xa6, 0x4e, 0x8d, 0x10, 0x9a, 0xc9, 0x3b, 0x8e, 0x52, 0x34, 0x55, 0x20, 0xa9, 0xa4, 0xb2, 0xf0, 0xf0, 0xb0, 0x29, 0x5c, 0xa7, 0xea, 0xc6, 0x11, 0x91, 0xa0, 0x10, 0x3, 0x77, 0xc3, 0xe8, 0xa7, 0xd1, 0x8b, 0xdc, 0x35, 0xc2, 0x95, 0x6f, 0x25, 0xec, 0xbb, 0x8a, 0x8a, 0xf5, 0xd6, 0x59, 0x9c, 0xa2, 0x8b, 0xc, 0x15, 0x5d, 0x50, 0xdb, 0xf2, 0xda, 0x79, 0xd6, 0xb8, 0xd5, 0x94, 0x99, 0xb9, 0x7a, 0x67, 0x8e, 0xd2, 0x6a, 0x58, 0x88, 0x68, 0xa4, 0xc2, 0x17, 0xdd, 0x5a, 0xf1, 0xd1, 0xe3, 0xc7, 0x3e, 0x76, 0x2e, 0x65, 0xc5, 0xc9, 0x3, 0x80})
 	expected := []byte{0xff, 0xf1, 0x4c, 0x80, 0x2d, 0x9f, 0xfc, 0x21, 0x2b, 0x94, 0xa5, 0xb6, 0xa, 0xe1, 0x63, 0x21, 0x88, 0xa2, 0x10, 0x4b, 0xdf, 0x9, 0x25, 0xb4, 0xd6, 0xe3, 0x4a, 0xd, 0xe3, 0xa3, 0x64, 0x8d, 0x1, 0x31, 0x80, 0x98, 0x8b, 0xdc, 0x79, 0x3e, 0x2d, 0xd8, 0xed, 0x68, 0xe0, 0xe5, 0xb2, 0x44, 0x13, 0x4, 0x53, 0xbf, 0x28, 0x92, 0xe5, 0xfa, 0x7d, 0x86, 0x78, 0x40, 0x78, 0x4c, 0xb5, 0xe, 0x15, 0x21, 0xc3, 0x57, 0x1a, 0x63, 0x8d, 0xe, 0xc, 0x69, 0xb5, 0x91, 0xd0, 0x52, 0xe, 0x1, 0xa8, 0x67, 0x3e, 0xf9, 0x4e, 0xa2, 0xdb, 0x8b, 0x4a, 0x52, 0x4a, 0xd0, 0x7d, 0x34, 0x4, 0x4f, 0x8d, 0x11, 0xd3, 0xd, 0x20, 0x98, 0x55, 0x86, 0x9, 0xfb, 0xe5, 0xdd, 0x28, 0xd9, 0x4c, 0xde, 0x40, 0x89, 0x26, 0x0, 0xd4, 0x14, 0xcb, 0x6a, 0xc5, 0x91, 0x48, 0xb5, 0xcf, 0x20, 0x6b, 0xbb, 0x16, 0x1b, 0x6b, 0xf4, 0x65, 0x32, 0x5a, 0x8d, 0x1a, 0xe0, 0xa9, 0xf2, 0xf4, 0x71, 0x7e, 0xb8, 0x6f, 0x93, 0xbc, 0x2, 0xf1, 0x36, 0x2b, 0x4e, 0x96, 0x7f, 0x6d, 0x7c, 0xc5, 0x8a, 0x6e, 0xed, 0x6, 0xa9, 0x7f, 0xbd, 0x97, 0x25, 0xb1, 0xa9, 0xac, 0x70, 0xba, 0x58, 0xd7, 0x31, 0x53, 0x94, 0x5f, 0xa5, 0x8f, 0x74, 0x35, 0xea, 0x64, 0x74, 0x6f, 0x19, 0x94, 0x11, 0x46, 0x99, 0x89, 0x80, 0x1c, 0x8a, 0x22, 0x52, 0xcf, 0x9, 0x43, 0x31, 0xc, 0x48, 0x63, 0x18, 0x25, 0xcf, 0x60, 0xcf, 0xc6, 0x46, 0x74, 0x35, 0xbd, 0xa7, 0x7c, 0x66, 0xaa, 0xf7, 0x97, 0x34, 0x4, 0x12, 0x30, 0x49, 0xae, 0x39, 0xb4, 0xfa, 0x74, 0x58, 0x72, 0x23, 0x8d, 0xdc, 0xaa, 0x58, 0x7c, 0xb5, 0x1c, 0xe9, 0x55, 0xd9, 0x55, 0x8c, 0x4e, 0x51, 0xd4, 0xa8, 0xb4, 0x76, 0x61, 0x55, 0xd0, 0xea, 0x55, 0x39, 0xda, 0x9, 0x1b, 0x52, 0x79, 0xbd, 0x8d, 0xff, 0xb8, 0xcb, 0xa0, 0xf4, 0xc2, 0xe3, 0xfc, 0x87, 0x80, 0x6c, 0xa8, 0xa6, 0x4e, 0x8d, 0x10, 0x9a, 0xc9, 0x3b, 0x8e, 0x52, 0x34, 0x55, 0x20, 0xa9, 0xa4, 0xb2, 0xf0, 0xf0, 0xb0, 0x29, 0x5c, 0xa7, 0xea, 0xc6, 0x11, 0x91, 0xa0, 0x10, 0x3, 0x77, 0xc3, 0xe8, 0xa7, 0xd1, 0x8b, 0xdc, 0x35, 0xc2, 0x95, 0x6f, 0x25, 0xec, 0xbb, 0x8a, 0x8a, 0xf5, 0xd6, 0x59, 0x9c, 0xa2, 0x8b, 0xc, 0x15, 0x5d, 0x50, 0xdb, 0xf2, 0xda, 0x79, 0xd6, 0xb8, 0xd5, 0x94, 0x99, 0xb9, 0x7a, 0x67, 0x8e, 0xd2, 0x6a, 0x58, 0x88, 0x68, 0xa4, 0xc2, 0x17, 0xdd, 0x5a, 0xf1, 0xd1, 0xe3, 0xc7, 0x3e, 0x76, 0x2e, 0x65, 0xc5, 0xc9, 0x3, 0x80}
 	assert.Equal(t, expected, b.Bytes())
-}
\ No newline at end of file
+}
diff --git a/pkg/avc/avc_test.go b/pkg/avc/avc_test.go
index 9ee3610..962c124 100644
--- a/pkg/avc/avc_test.go
+++ b/pkg/avc/avc_test.go
@@ -24,4 +24,4 @@ func TestCorner(t *testing.T) {
 	err = CaptureAVC(b, []byte{0x17, 0x0, 0x1})
 	assert.Equal(t, nil, b.Bytes())
 	assert.Equal(t, err, avcErr)
-}
\ No newline at end of file
+}
diff --git a/pkg/rtmp/server_session.go b/pkg/rtmp/server_session.go
index 2c2a330..176baa3 100644
--- a/pkg/rtmp/server_session.go
+++ b/pkg/rtmp/server_session.go
@@ -114,14 +114,14 @@ func (s *ServerSession) AsyncWrite(msg []byte) error {
 	return nil
 }
 
-func (s *ServerSession) ReadableType()string {
+func (s *ServerSession) ReadableType() string {
 	switch s.t {
 	case ServerSessionTypePub:
 		return "PUB"
 	case ServerSessionTypeSub:
 		return "SUB"
 	}
-	return  "UNKNOWN"
+	return "UNKNOWN"
 }
 
 func (s *ServerSession) runReadLoop() error {