diff --git a/runtime/v8/dispatcher.go b/runtime/v8/dispatcher.go
index 0d50f4b9..1ff85746 100644
--- a/runtime/v8/dispatcher.go
+++ b/runtime/v8/dispatcher.go
@@ -62,7 +62,7 @@ func (dispatcher *Dispatcher) Start() error {
 // Stop stop the v8 mannager
 func (dispatcher *Dispatcher) Stop() {
 	for _, runner := range dispatcher.availables.data {
-		dispatcher.destory(runner)
+		dispatcher.destroy(runner)
 		runner.signal <- RunnerCommandDestroy
 	}
 }
@@ -75,7 +75,7 @@ func (dispatcher *Dispatcher) offline(runner *Runner) {
 
 func (dispatcher *Dispatcher) _offline(runner *Runner) {
 	delete(dispatcher.availables.data, runner.id)
-	log.Trace("[dispatcher] runner %d offline (%d/%d) %s", runner.id, len(dispatcher.availables.data), dispatcher.total, dispatcher.health)
+	log.Trace("[dispatcher] [%d] runner offline. availables:%d, total:%d, %s", runner.id, len(dispatcher.availables.data), dispatcher.total, dispatcher.health)
 	// create a new runner if the total runners are less than max
 	// if dispatcher.total < dispatcher.max {
 	// 	go dispatcher.create()
@@ -86,7 +86,7 @@ func (dispatcher *Dispatcher) online(runner *Runner) {
 	dispatcher.availables.mutex.Lock()
 	defer dispatcher.availables.mutex.Unlock()
 	dispatcher.availables.data[runner.id] = runner
-	log.Trace("[dispatcher] runner %d online (%d/%d) %s", runner.id, len(dispatcher.availables.data), dispatcher.total, dispatcher.health)
+	log.Trace("[dispatcher] [%d] runner online. availables:%d, total:%d, %s", runner.id, len(dispatcher.availables.data), dispatcher.total, dispatcher.health)
 }
 
 func (dispatcher *Dispatcher) create() {
@@ -95,15 +95,15 @@ func (dispatcher *Dispatcher) create() {
 	go runner.Start(ready)
 	<-ready
 	dispatcher.total++
-	log.Trace("[dispatcher] runner %d create (%d/%d) %s", runner.id, len(dispatcher.availables.data), dispatcher.total, dispatcher.health)
+	log.Trace("[dispatcher] [%d] runner create. availables:%d, total:%d, %s", runner.id, len(dispatcher.availables.data), dispatcher.total, dispatcher.health)
 }
 
-func (dispatcher *Dispatcher) destory(runner *Runner) {
+func (dispatcher *Dispatcher) destroy(runner *Runner) {
 	dispatcher.availables.mutex.Lock()
 	defer dispatcher.availables.mutex.Unlock()
 	delete(dispatcher.availables.data, runner.id)
 	dispatcher.total--
-	log.Trace("[dispatcher] runner %d destory (%d,%d) %s", runner.id, len(dispatcher.availables.data), dispatcher.total, dispatcher.health)
+	log.Trace("[dispatcher] [%d] runner destroy. availables:%d, total:%d, %s", runner.id, len(dispatcher.availables.data), dispatcher.total, dispatcher.health)
 }
 
 // Select select a free v8 runner
@@ -114,8 +114,8 @@ func (dispatcher *Dispatcher) Select(timeout time.Duration) (*Runner, error) {
 
 	for _, runner := range dispatcher.availables.data {
 		dispatcher._offline(runner)
-		log.Debug(fmt.Sprintf("--- %d -----------------\n", runner.id))
-		log.Debug(fmt.Sprintln("1.  Select a free v8 runner id", runner.id, "count", len(dispatcher.availables.data)))
+		log.Debug(fmt.Sprintf("--- [%d] -----------------", runner.id))
+		log.Debug(fmt.Sprintf("1.  [%d] Select a free v8 runner. availables=%d", runner.id, len(dispatcher.availables.data)))
 		return runner, nil
 	}
 
@@ -162,7 +162,7 @@ func (dispatcher *Dispatcher) totalCount() {
 }
 
 func (health *Health) String() string {
-	return fmt.Sprintf("missing: %d, total: %d", health.missing, health.total)
+	return fmt.Sprintf("missing:%d, total:%d", health.missing, health.total)
 }
 
 // Reset reset the health
diff --git a/runtime/v8/runner.go b/runtime/v8/runner.go
index d1fd1776..b460948f 100644
--- a/runtime/v8/runner.go
+++ b/runtime/v8/runner.go
@@ -55,9 +55,6 @@ const (
 	// RunnerCommandExec is the runner command exec
 	RunnerCommandExec
 
-	// RunnerCommandClose is the runner command close
-	RunnerCommandClose
-
 	// RunnerCommandStatus is the runner command status
 	RunnerCommandStatus
 )
@@ -97,6 +94,7 @@ func (runner *Runner) Start(ready chan bool) error {
 	}
 
 	ticker := time.NewTicker(time.Millisecond * 50)
+
 	ready <- true
 
 	// Command loop
@@ -120,12 +118,8 @@ func (runner *Runner) Start(ready chan bool) error {
 				runner.exec()
 				break
 
-			case RunnerCommandClose:
-				runner.close()
-				break
-
 			case RunnerCommandDestroy:
-				runner.destory()
+				runner.destroy()
 				return nil
 
 			default:
@@ -152,7 +146,7 @@ func (runner *Runner) Exec(script *Script) interface{} {
 	runner.status = RunnerStatusRunning
 	runner.script = script
 	runner.chResp = make(chan interface{})
-	log.Debug(fmt.Sprintln("2.  Exec a script to the v8 runner to execute", "runner.id:", runner.id, "status:", runner.status, "keepalive:", runner.keepalive, len(runner.signal)))
+	log.Debug(fmt.Sprintf("2.  [%d] Exec script %s.%s. status:%d, keepalive:%v, signal:%d", runner.id, script.ID, runner.method, runner.status, runner.keepalive, len(runner.signal)))
 
 	runner.signal <- RunnerCommandExec
 	select {
@@ -171,13 +165,15 @@ func (runner *Runner) exec() {
 	defer func() {
 		go func() {
 			if !runner.keepalive {
-				log.Debug(fmt.Sprintln("3.1 Send a destory signal to the v8 runner", "runner.id:", runner.id, "status:", runner.status, runner.keepalive))
+				log.Debug(fmt.Sprintf("3.1 [%d] Send a destroy signal to the v8 runner. status:%d, keepalive:%v", runner.id, runner.status, runner.keepalive))
 				runner.signal <- RunnerCommandDestroy
-				log.Debug(fmt.Sprintln("3.2 Send a destory signal to the v8 runner done", "runner.id:", runner.id, "status:", runner.status))
+				log.Debug(fmt.Sprintf("3.2 [%d] Send a destroy signal to the v8 runner. sstatus:%d, keepalive:%v (done)", runner.id, runner.status, runner.keepalive))
 				return
 			}
-			runner.signal <- RunnerCommandClose
-			log.Debug(fmt.Sprintln("3.  Send a close signal to the v8 runner done", "runner.id:", runner.id, "status:", runner.status, runner.keepalive))
+
+			log.Debug(fmt.Sprintf("3.1 [%d] Send a reset signal to the v8 runner. status:%d, keepalive:%v", runner.id, runner.status, runner.keepalive))
+			runner.signal <- RunnerCommandReset
+			log.Debug(fmt.Sprintf("3.2 [%d] Send a reset signal to the v8 runner. status:%d, keepalive:%v (done)", runner.id, runner.status, runner.keepalive))
 		}()
 	}()
 
@@ -235,32 +231,11 @@ func (runner *Runner) _exec() {
 	runner.chResp <- goRes
 }
 
-func (runner *Runner) close() {
+// destroy the runner
+func (runner *Runner) destroy() {
 
-	log.Debug(fmt.Sprintln("4.  close the runner", "runner.id:", runner.id, "status:", runner.status))
-	log.Debug(fmt.Sprintf("--- %d end -----------------\n\n", runner.id))
-
-	if runner.keepalive {
-		runner.reset()
-		return
-	}
-
-	// Clean the runner
-	if runner.signal != nil {
-		close(runner.signal)
-	}
-	runner.ctx.Close()
-	runner.iso.Dispose()
-	runner.iso = nil
-	runner.ctx = nil
-	runner.args = nil
-}
-
-// destory the runner
-func (runner *Runner) destory() {
-
-	log.Debug(fmt.Sprintln("4.  destory the runner", "runner.id:", runner.id, "status:", runner.status))
-	log.Debug(fmt.Sprintf("--- %d end -----------------\n\n", runner.id))
+	log.Debug(fmt.Sprintf("4.  [%d] destroy the runner. status:%d, keepalive:%v ", runner.id, runner.status, runner.keepalive))
+	log.Debug(fmt.Sprintf("--- [%d] end -----------------", runner.id))
 
 	runner.status = RunnerStatusDestroy
 	if runner.signal != nil {
@@ -277,8 +252,10 @@ func (runner *Runner) destory() {
 // reset the runner
 func (runner *Runner) reset() {
 
+	log.Debug(fmt.Sprintf("4.  [%d] destroy the runner. status:%d, keepalive:%v ", runner.id, runner.status, runner.keepalive))
+	log.Debug(fmt.Sprintf("--- [%d] end -----------------", runner.id))
+
 	runner.status = RunnerStatusDestroy
-	// dispatcher.UpdateStatus(runner, RunnerStatusDestroy)
 
 	runner.ctx.Close()
 	runner.iso.Dispose()