@Override
  public TaskRunResult run(Task task) {

    OperationResult result =
        task.getResult().createSubresult(WaitForTasksTaskHandler.class.getName() + ".run");
    result.recordInProgress();

    LOGGER.info("WaitForTasksTaskHandler run starting; in task " + task.getName());
    try {
      // todo resolve this brutal hack
      taskManagerImpl.pauseTask(task, TaskWaitingReason.OTHER, result);
      task.startWaitingForTasksImmediate(result);
    } catch (SchemaException e) {
      throw new SystemException(
          "Couldn't mark task as waiting for prerequisite tasks",
          e); // should not occur; will be handled by task runner
    } catch (ObjectNotFoundException e) {
      throw new SystemException(
          "Couldn't mark task as waiting for prerequisite tasks",
          e); // should not occur; will be handled by task runner
    }
    LOGGER.info("WaitForTasksTaskHandler run finishing; in task " + task.getName());

    result.computeStatus();

    TaskRunResult runResult = new TaskRunResult();
    runResult.setOperationResult(result);
    runResult.setProgress(task.getProgress()); // not to overwrite task's progress
    runResult.setRunResultStatus(TaskRunResultStatus.FINISHED);
    return runResult;
  }