// Stop the thread by sending n = -1
        synchronized (w) {
            w.write(new byte[0], -1, out);
        }

        w.join(2000);
        assertFalse(w.isAlive(), "WriterThread should stop after -1 sentinel");
    }

    @Test
    @DisplayName("WriterThread surfaces SmbException via checkException")
    void writerThread_propagates_exception() throws Exception {

      locked.await(1, MINUTES);
    }

    void releaseLockAndFinish() throws InterruptedException {
      finishLatch.countDown();
      this.join(10000);
      assertFalse(this.isAlive());
    }
  }

  public void testReentrantReadWriteLock_implDoesNotExposeShadowedLocks() {
    assertEquals(
        "Unexpected number of public methods in ReentrantReadWriteLock. "

      locked.await(1, MINUTES);
    }

    void releaseLockAndFinish() throws InterruptedException {
      finishLatch.countDown();
      this.join(10000);
      assertFalse(this.isAlive());
    }
  }

  public void testReentrantReadWriteLock_implDoesNotExposeShadowedLocks() {
    assertEquals(
        "Unexpected number of public methods in ReentrantReadWriteLock. "

            }
          }
        };
    waiter.start();
    awaitTimedWaiting(waiter);
    service.shutdown();
    Uninterruptibles.joinUninterruptibly(waiter, 10, SECONDS);
    if (waiter.isAlive()) {
      waiter.interrupt();
      fail("awaitTermination failed to trigger after shutdown()");
    }
  }

  /** Wait for the given thread to reach the {@link State#TIMED_WAITING} thread state. */

            }
          }
        };
    waiter.start();
    awaitTimedWaiting(waiter);
    service.shutdown();
    Uninterruptibles.joinUninterruptibly(waiter, 10, SECONDS);
    if (waiter.isAlive()) {
      waiter.interrupt();
      fail("awaitTermination failed to trigger after shutdown()");
    }
  }

  /** Wait for the given thread to reach the {@link State#TIMED_WAITING} thread state. */

        };
    stoppingThread.start();
    // this should be super fast since the only non-stopped service is a NoOpService
    stoppingThread.join(1000);
    assertFalse("stopAsync has deadlocked!.", stoppingThread.isAlive());
    failLeave.countDown(); // release the background thread
  }

  /**
   * Catches a bug where when constructing a service manager failed, later interactions with the

        } catch (final Throwable t) {
            logger.error("Crawler terminated unexpectedly.", t);
            exitCode = Constants.EXIT_FAIL;
        } finally {
            if (commandThread != null && commandThread.isAlive()) {
                commandThread.interrupt();
            }
            if (systemMonitorTask != null) {
                systemMonitorTask.cancel();
            }
            if (hotThreadMonitorTask != null) {

    Stopwatch stopwatch = Stopwatch.createStarted();
    Thread thread = new Thread(new JoinTarget(15));
    thread.start();
    thread.join();
    assertFalse(thread.isAlive());

    joinUninterruptibly(thread);
    joinUninterruptibly(thread, 0, MILLISECONDS);
    joinUninterruptibly(thread, -42, MILLISECONDS);
    joinUninterruptibly(thread, LONG_DELAY_MS, MILLISECONDS);

    Stopwatch stopwatch = Stopwatch.createStarted();
    Thread thread = new Thread(new JoinTarget(15));
    thread.start();
    thread.join();
    assertFalse(thread.isAlive());

    joinUninterruptibly(thread);
    joinUninterruptibly(thread, 0, MILLISECONDS);
    joinUninterruptibly(thread, -42, MILLISECONDS);
    joinUninterruptibly(thread, LONG_DELAY_MS, MILLISECONDS);

                  () -> {
                    reloadStarted.countDown();

                    Thread blockingForRefresh = threadAboutToBlockForRefresh.get();
                    while (blockingForRefresh.isAlive()
                        && blockingForRefresh.getState() != WAITING) {
                      Thread.yield();
                    }

                    return key + "Reload";
                  });