diff --git a/internal/docker/idlewatcher/waker_http.go b/internal/docker/idlewatcher/waker_http.go
index 2634e5fb..9f8085d6 100644
--- a/internal/docker/idlewatcher/waker_http.go
+++ b/internal/docker/idlewatcher/waker_http.go
@@ -12,7 +12,7 @@ import (
 	"github.com/yusing/go-proxy/internal/watcher/health"
 )
 
-// ServeHTTP implements http.Handler
+// ServeHTTP implements http.Handler.
 func (w *Watcher) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
 	shouldNext := w.wakeFromHTTP(rw, r)
 	if !shouldNext {
@@ -81,7 +81,7 @@ func (w *Watcher) wakeFromHTTP(rw http.ResponseWriter, r *http.Request) (shouldN
 	w.WakeTrace().Msg("signal received")
 	err := w.wakeIfStopped()
 	if err != nil {
-		w.WakeError(err).Send()
+		w.WakeError(err)
 		http.Error(rw, "Error waking container", http.StatusInternalServerError)
 		return false
 	}
diff --git a/internal/task/dummy_task.go b/internal/task/dummy_task.go
deleted file mode 100644
index 51eca111..00000000
--- a/internal/task/dummy_task.go
+++ /dev/null
@@ -1,43 +0,0 @@
-package task
-
-import "context"
-
-type dummyTask struct{}
-
-func DummyTask() (_ Task) {
-	return
-}
-
-// Context implements Task.
-func (d dummyTask) Context() context.Context {
-	panic("call of dummyTask.Context")
-}
-
-// Finish implements Task.
-func (d dummyTask) Finish() {}
-
-// Name implements Task.
-func (d dummyTask) Name() string {
-	return "Dummy Task"
-}
-
-// OnComplete implements Task.
-func (d dummyTask) OnComplete(about string, fn func()) {
-	panic("call of dummyTask.OnComplete")
-}
-
-// Parent implements Task.
-func (d dummyTask) Parent() Task {
-	panic("call of dummyTask.Parent")
-}
-
-// Subtask implements Task.
-func (d dummyTask) Subtask(usageFmt string, args ...any) Task {
-	panic("call of dummyTask.Subtask")
-}
-
-// Wait implements Task.
-func (d dummyTask) Wait() {}
-
-// WaitSubTasks implements Task.
-func (d dummyTask) WaitSubTasks() {}
diff --git a/internal/task/task.go b/internal/task/task.go
index d848136c..37345150 100644
--- a/internal/task/task.go
+++ b/internal/task/task.go
@@ -8,7 +8,6 @@ import (
 	"sync"
 	"time"
 
-	"github.com/rs/zerolog"
 	"github.com/yusing/go-proxy/internal/common"
 	E "github.com/yusing/go-proxy/internal/error"
 	"github.com/yusing/go-proxy/internal/logging"
@@ -28,8 +27,6 @@ func createGlobalTask() (t *task) {
 type (
 	// Task controls objects' lifetime.
 	//
-	// Task must be initialized, use DummyTask if the task is not yet started.
-	//
 	// Objects that uses a task should implement the TaskStarter and the TaskFinisher interface.
 	//
 	// When passing a Task object to another function,
@@ -167,8 +164,8 @@ func GlobalContextWait(timeout time.Duration) {
 	}
 }
 
-func (t *task) trace() *zerolog.Event {
-	return logger.Trace().Str("name", t.name)
+func (t *task) trace(msg string) {
+	logger.Trace().Str("name", t.name).Msg(msg)
 }
 
 func (t *task) Name() string {
@@ -244,7 +241,7 @@ func (t *task) OnCancel(about string, fn func()) {
 		<-t.ctx.Done()
 		fn()
 		onCompTask.Finish("done")
-		t.trace().Msg("onCancel done: " + about)
+		t.trace("onCancel done: " + about)
 	}()
 }
 
@@ -284,10 +281,10 @@ func (t *task) newSubTask(ctx context.Context, cancel context.CancelCauseFunc, n
 	parent.subTasksWg.Add(1)
 	parent.subtasks.Add(subtask)
 	if common.IsTrace {
-		subtask.trace().Msg("started")
+		subtask.trace("started")
 		go func() {
 			subtask.Wait()
-			subtask.trace().Msg("finished: " + subtask.FinishCause().Error())
+			subtask.trace("finished: " + subtask.FinishCause().Error())
 		}()
 	}
 	go func() {