private final CIFSContext context;
    private final ScheduledExecutorService cleanupExecutor;
    private static final long DEFAULT_LEASE_CLEANUP_INTERVAL = 60000; // 60 seconds
    private static final int DEFAULT_LEASE_BREAK_TIMEOUT = 60; // 60 seconds per MS-SMB2

    /**
     * Create a new lease manager
     *
     * @param context CIFS context
     */
    public LeaseManager(CIFSContext context) {

     *
     * @return the remaining lifetime in seconds. If the default lifetime is
     *         used, this value have no meaning.
     *
     */
    public int getUserLifeTime() {
        return this.userLifetime;
    }

    /**
     * Set lifetime of current user.
     *
     * @param time
     *            the lifetime in seconds
     *
     */
    public void setUserLifeTime(int time) {

                    endLatch.countDown();
                }
            });
        }

        startLatch.countDown(); // Start all threads
        assertTrue(endLatch.await(30, TimeUnit.SECONDS), "All threads should complete within timeout");
        executor.shutdown();

        long overallEnd = System.nanoTime();
        double overallTimeMs = (overallEnd - overallStart) / 1_000_000.0;

    future.set(1);
    assertEquals(1, future.get(-1, SECONDS).intValue());
  }

  @J2ktIncompatible
  @GwtIncompatible // threads
  public void testOverflowTimeout() throws Exception {
    // First, sanity check that naive multiplication would really overflow to a negative number:
    long nanosPerSecond = NANOSECONDS.convert(1, SECONDS);
    assertThat(nanosPerSecond * Long.MAX_VALUE).isLessThan(0L);

    /** List of JVM options to apply when executing the job */
    protected List<String> jvmOptions = new ArrayList<>();

    /** Lasta environment configuration */
    protected String lastaEnv;

    /** Timeout in seconds for job execution (-1 means no timeout) */
    protected int timeout = -1; // sec

    /** Flag indicating whether the process has timed out */
    protected boolean processTimeout = false;

    /**

    enableProtocol(protocol)

    server.enqueue(
      MockResponse
        .Builder()
        .trailers(headersOf("t1", "v2"))
        .bodyDelay(1, TimeUnit.SECONDS)
        .body(protocol, "Hello")
        .build(),
    )

    val call = client.newCall(Request(server.url("/")))
    call.execute().use { response ->
      response.close()

import static com.google.common.util.concurrent.MoreExecutors.directExecutor;
import static java.util.concurrent.Executors.newScheduledThreadPool;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.junit.Assert.assertThrows;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;

#### A "professional" attack { #a-professional-attack }

Of course, the attackers would not try all this by hand, they would write a program to do it, possibly with thousands or millions of tests per second. And they would get just one extra correct letter at a time.

  fun get() {
    val executor = Executors.newCachedThreadPool()

    val completableFuture = execute(engine, executor, "https://google.com/robots.txt")

    try {
      val response = completableFuture.get(10, TimeUnit.SECONDS)

      assertEquals(200, response.code)
      assertEquals("h3", response.negotiatedProtocol)
      assertTrue(response.content.contains("Disallow"))
    } catch (ee: ExecutionException) {

            ImmutableSet.of(
                // DurationSpec.of(500, MILLISECONDS),
                DurationSpec.of(1, SECONDS), DurationSpec.of(1, DAYS)))
        .withExpireAfterAccesses(
            ImmutableSet.of(
                // DurationSpec.of(500, MILLISECONDS),
                DurationSpec.of(1, SECONDS), DurationSpec.of(1, DAYS)))
        .withRefreshes(
            ImmutableSet.of(