if (jobManager.isSchedulingDone()) {
                jobManager.findJobByUniqueOf(LaJobUnique.of(scheduledJob.getId())).ifPresent(job -> {
                    job.unschedule();
                }).orElse(() -> logger.debug("Job {} is not scheduled.", scheduledJob.getId()));
            }
        } catch (final Exception e) {

      private ScheduledFuture<@Nullable Void> submitToExecutor(Schedule schedule) {
        return executor.schedule(this, schedule.delay, schedule.unit);
      }
    }

    /**
     * Contains the most recently submitted {@code Future}, which may be cancelled or updated,
     * always under a lock.
     */
    private static final class SupplantableFuture implements Cancellable {
      private final ReentrantLock lock;

      private ScheduledFuture<@Nullable Void> submitToExecutor(Schedule schedule) {
        return executor.schedule(this, schedule.delay, schedule.unit);
      }
    }

    /**
     * Contains the most recently submitted {@code Future}, which may be cancelled or updated,
     * always under a lock.
     */
    private static final class SupplantableFuture implements Cancellable {
      private final ReentrantLock lock;

      "FINE: Q10000 finished run in   0 µs: task",
    )
  }

  @Test fun executeRepeated() {
    val delays = mutableListOf(50.µs, 150.µs, -1L)
    redQueue.schedule("task", 100.µs) {
      log += "run@${taskFaker.nanoTime}"
      return@schedule delays.removeAt(0)
    }

    taskFaker.advanceUntil(0.µs)
    assertThat(log).containsExactly()

    taskFaker.advanceUntil(100.µs)

        )
      this.writerTask = WriterTask()
      if (pingIntervalMillis != 0L) {
        val pingIntervalNanos = MILLISECONDS.toNanos(pingIntervalMillis)
        taskQueue.schedule("$name ping", pingIntervalNanos) {
          writePingFrame()
          return@schedule pingIntervalNanos
        }
      }
      if (messageAndCloseQueue.isNotEmpty()) {
        runWriter() // Send messages that were enqueued before we were connected.

        log.warn("Witness service unavailable: {}", error.getMessage());
        serviceAvailable = false;
        
        // Schedule retry
        scheduleServiceRetry();
    }
    
    private void scheduleServiceRetry() {
        scheduler.schedule(() -> {
            try {
                // Test if service is back online
                if (testWitnessService()) {

  @LazyInit
  @GuardedBy("queue")
  private WorkerRunningState workerRunningState = IDLE;

  /**
   * This counter prevents an ABA issue where a thread may successfully schedule the worker, the
   * worker runs and exhausts the queue, another thread enqueues a task and fails to schedule the
   * worker, and then the first thread's call to delegate.execute() returns. Without this counter,

  @LazyInit
  @GuardedBy("queue")
  private WorkerRunningState workerRunningState = IDLE;

  /**
   * This counter prevents an ABA issue where a thread may successfully schedule the worker, the
   * worker runs and exhausts the queue, another thread enqueues a task and fails to schedule the
   * worker, and then the first thread's call to delegate.execute() returns. Without this counter,

  @get:Synchronized @set:Synchronized
  var maxSize: Long = maxSize
    set(value) {
      field = value
      if (initialized) {
        cleanupQueue.schedule(cleanupTask) // Trim the existing store if necessary.
      }
    }

  /*
   * This cache uses a journal file named "journal". A typical journal file looks like this:
   *
   *     libcore.io.DiskLruCache

            completed.countDown();
          }
        };
    ListeningScheduledExecutorService service = listeningDecorator(delegate);
    ListenableFuture<Integer> future = service.schedule(Callables.returning(42), 1, MILLISECONDS);

    /*
     * Wait not just until the Future's value is set (as in future.get()) but
     * also until ListeningScheduledExecutorService's wrapper task is done