@Override
    public SearchRequestBuilder prepareSearch(final String... indices) {
        final SearchRequestBuilder builder = client.prepareSearch(indices);
        if (searchPreference != null) {
            builder.setPreference(searchPreference);
        }
        return builder;
    }

    @Override
    public ActionFuture<SearchResponse> searchScroll(final SearchScrollRequest request) {

        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        SearchResponse response = option.apply(client.prepareSearch(index).setScroll(scrollForUpdate).setSize(sizeForUpdate)
                .setPreference(Constants.SEARCH_PREFERENCE_LOCAL)).execute().actionGet(fessConfig.getIndexScrollSearchTimeout());

        int count = 0;
        String scrollId = response.getScrollId();
        try {

                    reference = getReference(dejaVu, cause);
                }

                if (reference == null || reference.isEmpty()) {
                    reference = exception.getClass().getSimpleName();
                }
            } else if (exception instanceof LifecycleExecutionException) {
                reference = getReference(dejaVu, exception.getCause());

        String referenceKey = "";

        if (summary.getReference() != null && !summary.getReference().isEmpty()) {
            referenceKey =
                    references.computeIfAbsent(summary.getReference(), k -> "[Help " + (references.size() + 1) + "]");
        }

        String msg = summary.getMessage();

    }

    public Throwable getException() {
        return exception;
    }

    public String getMessage() {
        return message;
    }

    public String getReference() {
        return reference;
    }

    public List<ExceptionSummary> getChildren() {
        return children;
    }

        String referenceKey = "";

        if (summary.getReference() != null && !summary.getReference().isEmpty()) {
            referenceKey =
                    references.computeIfAbsent(summary.getReference(), k -> "[Help " + (references.size() + 1) + "]");
        }

        String msg = summary.getMessage();