try {
            super.insert(urlQueue, urlQueue.getId() == null ? OpType.CREATE : OpType.INDEX);
        } catch (final OpenSearchAccessException e) {
            final Throwable cause = e.getCause();
            if (cause != null && "VersionConflictEngineException".equals(cause.getClass().getSimpleName())) {
                if (logger.isDebugEnabled()) {

       */
      setException(e);
      return;
    }

    T transformResult;
    try {
      transformResult = doTransform(localFunction, sourceResult);
    } catch (Throwable t) {
      restoreInterruptIfIsInterruptedException(t);
      // This exception is irrelevant in this thread, but useful for the client.
      setException(t);
      return;
    } finally {
      function = null;

        assertArgumentNotNull("method", method);

        try {
            return (T) method.invoke(target, args);
        } catch (final InvocationTargetException ex) {
            final Throwable t = ex.getCause();
            if (t instanceof RuntimeException) {
                throw (RuntimeException) t;
            }
            if (t instanceof Error) {
                throw (Error) t;
            }

   */
  @GuardedBy("lock")
  private boolean isSatisfied(Guard guard) {
    try {
      return guard.isSatisfied();
    } catch (Throwable throwable) {
      // Any Exception is either a RuntimeException or sneaky checked exception.
      signalAllWaiters();
      throw throwable;
    }
  }

  /** Signals all threads waiting on guards. */
  @GuardedBy("lock")
  private void signalAllWaiters() {

                new EqualsTester().addEqualityGroup(new EqualsBasedOnToString("foo")).testEquals());
    assertThat(e).hasMessageThat().contains("toString representation");
  }

  private static void assertErrorMessage(Throwable e, String message) {
    // TODO(kevinb): use a Truth assertion here
    if (!e.getMessage().contains(message)) {
      fail("expected <" + e.getMessage() + "> to contain <" + message + ">");
    }
  }

  /**

        Character.class,
        int[].class,
        Object[].class,
        UnsignedInteger.class,
        UnsignedLong.class,
        BigInteger.class,
        BigDecimal.class,
        Throwable.class,
        Error.class,
        Exception.class,
        RuntimeException.class,
        Charset.class,
        Locale.class,
        Currency.class,
        List.class,
        Entry.class,

     * @param se the SmbException to convert
     * @return an IOException wrapping the SmbException
     */
    protected static IOException seToIoe(final SmbException se) {
        IOException ioe = se;
        Throwable root = se.getCause();
        if (root instanceof TransportException) {
            ioe = (TransportException) root;
            root = ioe.getCause();
        }
        if (root instanceof InterruptedException) {

     *
     * @param success A callback for successful indexing.
     * @param error   A callback for indexing errors.
     */
    public void indexFromDocuments(final Consumer<Boolean> success, final Consumer<Throwable> error) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final long interval = fessConfig.getSuggestUpdateRequestIntervalAsInteger().longValue();

    }

    @Test
    public void test_rejectWithNullError() throws Exception {
        final Deferred<SuggestResponse> deferred = new Deferred<>();
        final AtomicReference<Throwable> received = new AtomicReference<>();
        final CountDownLatch latch = new CountDownLatch(1);

        deferred.promise().error(error -> {
            received.set(error);
            latch.countDown();

      Closer closer = Closer.create();
      try {
        FileInputStream in = closer.register(openStream());
        return ByteStreams.toByteArray(in, in.getChannel().size());
      } catch (Throwable e) {
        throw closer.rethrow(e);
      } finally {
        closer.close();
      }
    }

    @Override
    public String toString() {
      return "Files.asByteSource(" + file + ")";
    }