message: fix parallel bug
diff: @@ -215,6 +215,7 @@ TaskHandler<TaskT> TaskExecutor<TaskT>::schedule(
  LOG(ERROR) << "Failed get TaskT from object pool";
  return TaskHandler<TaskT>::valid_handle();
  }
  + task->clear();
  /*
  if (!BatchTasks<TaskT>::check_valid(in, out, _overrun)) {
  