diff --git a/hookq/consumer.go b/hookq/consumer.go
index af77041..452fcb2 100644
--- a/hookq/consumer.go
+++ b/hookq/consumer.go
@@ -51,7 +51,7 @@ type Consumer struct {
 	startOnce  sync.Once
 	stopOnce   sync.Once
 	stopChan   chan struct{}
-	quitSignal chan struct{}
+	exitSignal chan struct{}
 }
 
 //NewConsumer new consumer
@@ -88,7 +88,7 @@ func NewConsumer(cnf *Cnf, mh MsgHandler, eh *ErrHandler) (*Consumer, error) {
 		submittedID: sid,
 		submittedTS: submittedTS,
 		stopChan:    make(chan struct{}),
-		quitSignal:  make(chan struct{}),
+		exitSignal:  make(chan struct{}),
 	}
 	return c, nil
 }
@@ -105,21 +105,37 @@ func (c *Consumer) Stop() {
 
 //Wait : wait consumer quit
 func (c *Consumer) Wait() {
-	<-c.quitSignal
+	<-c.exitSignal
+}
+
+//ExitSignal : exit consumer signal
+func (c *Consumer) ExitSignal() <-chan struct{} {
+	return c.exitSignal
 }
 
 //start : start consumer in go routine
 func (c *Consumer) start() {
 	go func() {
-		defer close(c.quitSignal)
+		defer close(c.exitSignal)
+		var timer *time.Timer
 		for {
+			c.process()
+			if timer == nil {
+				timer = time.NewTimer(c.tick)
+			} else {
+				if !timer.Stop() {
+					<-timer.C
+				}
+				timer.Reset(c.tick)
+			}
 			select {
+			case <-timer.C:
 			case <-c.stopChan:
 				c.submitWhenExit()
+				if !timer.Stop() {
+					<-timer.C
+				}
 				return
-			default:
-				c.process()
-				time.Sleep(c.tick)
 			}
 		}
 	}()
diff --git a/hookq/example/bin/cnf.json b/hookq/example/bin/cnf.json
index d589465..33a5d55 100644
--- a/hookq/example/bin/cnf.json
+++ b/hookq/example/bin/cnf.json
@@ -9,15 +9,15 @@
       "charset": "utf8mb4",
       "parseTime": "True",
       "loc": "Local"
-    },
-    "logGorm": true,
-    "topicTbl": "topic.topic_example000",
-    "cursorTbl": "topic.topic_cursor_example000",
-    "id": "000",
-    "n": 500,
-    "tick": "10s",
-    "catchN": 1000,
-    "catchT": "600s",
-    "submitRetryNum": 10
-  }
+    }
+  },
+  "logGorm": true,
+  "topicTbl": "topic.topic_example000",
+  "cursorTbl": "topic.topic_cursor_example000",
+  "id": "000",
+  "n": 500,
+  "tick": "10s",
+  "catchN": 1000,
+  "catchT": "600s",
+  "submitRetryNum": 10
 }
diff --git a/hookq/example/consumer.go b/hookq/example/consumer.go
index 26dd863..a37c153 100644
--- a/hookq/example/consumer.go
+++ b/hookq/example/consumer.go
@@ -5,12 +5,20 @@ import (
 	"github.com/urfave/cli/v2"
 	"github.com/vmihailenco/msgpack/v5"
 	"log"
+	"os"
+	"os/signal"
+	"syscall"
 )
 
 type MsgHandler struct {
+	panicMode bool
 }
 
-func (m MsgHandler) Do(msg *hookq.Msg) error {
+func NewMsgHandler(panicMode bool) hookq.MsgHandler {
+	return &MsgHandler{panicMode: panicMode}
+}
+
+func (m *MsgHandler) Do(msg *hookq.Msg) error {
 	log.Println("id:", msg.ID)
 	log.Println("protocol:", msg.P)
 	var a OrderAction
@@ -19,6 +27,9 @@ func (m MsgHandler) Do(msg *hookq.Msg) error {
 		return err
 	}
 	log.Printf("msg:{id:%d, state:%d}\n", a.ID, a.State)
+	if m.panicMode {
+		panic("self.panic")
+	}
 	return nil
 }
 
@@ -26,7 +37,7 @@ type ErrorHandler struct {
 	category string
 }
 
-func NewErrorHandler(cat string) *ErrorHandler {
+func NewErrorHandler(cat string) hookq.ErrDo {
 	return &ErrorHandler{category: cat}
 }
 
@@ -65,6 +76,10 @@ var consumerCmd = &cli.Command{
 			Usage: "catch time duration",
 			Value: 0,
 		},
+		&cli.StringFlag{
+			Name:  "m",
+			Usage: "mode -- n(tiny mode)/p(panic mode)/w(whole mode)",
+		},
 	},
 	Action: consumerMsg,
 }
@@ -75,7 +90,15 @@ func consumerMsg(c *cli.Context) error {
 		return err
 	}
 	var consumer *hookq.Consumer
-	consumer, err = hookq.NewConsumer(cnf, MsgHandler{}, &hookq.ErrHandler{
+	var mode = c.String("m")
+	var msgHandler hookq.MsgHandler
+	if mode == "p" {
+		msgHandler = NewMsgHandler(true)
+	} else {
+		msgHandler = NewMsgHandler(false)
+	}
+
+	consumer, err = hookq.NewConsumer(cnf, msgHandler, &hookq.ErrHandler{
 		ReadErrHandler:   NewErrorHandler("read"),
 		SubmitErrHandler: NewErrorHandler("submit"),
 		MsgErrHandler:    NewErrorHandler("msg"),
@@ -84,8 +107,26 @@ func consumerMsg(c *cli.Context) error {
 		return err
 	}
 	consumer.Start()
-	consumer.Wait()
-	return nil
+
+	switch mode {
+	case "p", "w":
+		var signalChan = make(chan os.Signal, 1)
+		signal.Notify(signalChan, syscall.SIGINT, syscall.SIGTERM)
+		select {
+		case <-signalChan:
+			consumer.Stop()
+			consumer.Wait()
+			log.Println("consumer.exit.by.signal")
+			return nil
+		case <-consumer.ExitSignal():
+			log.Println("consumer.exit.by.internal.error")
+			return nil
+		}
+	default:
+		consumer.Wait()
+		log.Println("consumer.default.quit")
+		return nil
+	}
 }
 
 func loadConsumerCnf(c *cli.Context) (*hookq.Cnf, error) {