[FIX] Stop Dequeue Loop

radish.go

@@ -415,13 +415,20 @@ func (e *executor) dequeue(stop <-chan struct{}) (err error) {
 		default:
 		}
 
-		if err = e.dequeueOne(); err != nil {
+		var more bool
+		if more, err = e.dequeueOne(); err != nil {
 			return err
 		}
+
+		// Stop if the there are no more tasks to dequeue and wait the poll interval
+		// before trying to dequeue again. If there are more tasks to dequeue, continue.
+		if !more {
+			return nil
+		}
 	}
 }
 
-func (e *executor) dequeueOne() (err error) {
+func (e *executor) dequeueOne() (more bool, err error) {
 	// Create a context and a span for each dequeue operation.
 	ctx, span := e.tracer.Start(context.Background(), "radish.Dequeue")
 	defer span.End()
@@ -430,21 +437,22 @@ func (e *executor) dequeueOne() (err error) {
 	var task *models.TaskMeta
 	if task, err = e.dequeueTask(ctx); err != nil {
 		if errors.Is(err, dberr.ErrNotFound) {
-			return nil
+			return false, nil
 		}
 
 		span.RecordError(err)
 		span.SetStatus(codes.Error, "unable to dequeue task")
-		return err
+		return false, err
 	}
 
 	if err = e.execute(ctx, task); err != nil {
 		span.RecordError(err)
 		span.SetStatus(codes.Error, "unable to execute task")
-		return err
+		return false, err
 	}
 
-	return nil
+	// Successfully executed the task, continue dequeuing.
+	return true, nil
 }
 
 func (e *executor) dequeueTask(ctx context.Context) (task *models.TaskMeta, err error) {