// A handle to the running task so that we can stop it when a shutdown has been requested.
    // These two fields are volatile because their values will be accessed from multiple threads.
    private volatile @Nullable Cancellable runningTask;
    private volatile @Nullable ScheduledExecutorService executorService;

 *
 * <p>As of Guava 23.0, this class is thread-safe and lock-free. It internally uses atomics and
 * compare-and-swap to ensure correctness when multiple threads are used to access it.
 *
 * @param <T> the type of instances that the {@code BloomFilter} accepts
 * @author Dimitris Andreou
 * @author Kevin Bourrillion
 * @since 11.0 (thread-safe since 23.0)
 */
@Beta

        acceptConnections()
      } catch (e: Throwable) {
        logger.log(Level.WARNING, "$this failed unexpectedly", e)
      }

      // Release all sockets and all threads, even if any close fails.
      serverSocket?.closeQuietly()

      val openClientSocket = openClientSockets.iterator()
      while (openClientSocket.hasNext()) {
        openClientSocket.next().closeQuietly()

      <version>1.3.0</version>
    </dependency>
    ```

 *  **Fix: improve parallelism of async requests.** OkHttp's Dispatcher had a
    misconfigured `ExecutorService` that limited the number of worker threads.
    If you're using `Call.enqueue()` this update should significantly improve
    request concurrency.

 *  **Fix: Lazily initialize the response cache.** This avoids strict mode

   * (Specifically, {@code directExecutor} functions should avoid heavyweight operations inside
   * {@code AsyncClosingFunction.apply}. Any heavyweight operations should occur in other threads
   * responsible for completing the returned {@code ClosingFuture}.)
   *
   * <p>After calling this method, you may not call {@link #finishToFuture()}, {@link

      Integer uid = uids.get(obj);
      if (uid == null) {
        // One or more integer values could be skipped in the event of a race
        // to generate a UID for the same object from multiple threads, but
        // that shouldn't be a problem.
        uid = counter.getAndIncrement();
        Integer alreadySet = uids.putIfAbsent(obj, uid);
        if (alreadySet != null) {
          uid = alreadySet;
        }

   * are guarded by a lock and operations are applied in batches to avoid lock contention. The
   * penalty of applying the batches is spread across threads so that the amortized cost is slightly
   * higher than performing just the operation without enforcing the capacity constraint.
   *
   * This implementation uses a per-segment queue to record a memento of the additions, removals,

                         * sent. Unfortunately calling disconnect() doesn't always
                         * actually shutdown the connection before other threads
                         * have committed themselves (e.g. InterruptTest example).
                         */
                        try {
                            trans.disconnect(true);

   * are guarded by a lock and operations are applied in batches to avoid lock contention. The
   * penalty of applying the batches is spread across threads so that the amortized cost is slightly
   * higher than performing just the operation without enforcing the capacity constraint.
   *

    /** The key of the message: Name */
    public static final String LABELS_NAME = "{labels.name}";

    /** The key of the message: Number of Threads */
    public static final String LABELS_NUM_OF_THREAD = "{labels.numOfThread}";

    /** The key of the message: Duplicate Host Name */
    public static final String LABELS_DUPLICATE_HOST_NAME = "{labels.duplicateHostName}";