}

  /**
   * Tests that a ServiceManager can be fully shut down if one of its failure listeners is slow or
   * even permanently blocked.
   */
  public void testListenerDeadlock() throws InterruptedException {
    final CountDownLatch failEnter = new CountDownLatch(1);
    final CountDownLatch failLeave = new CountDownLatch(1);
    final CountDownLatch afterStarted = new CountDownLatch(1);