* @param newIndex the new index to point aliases to
     * @return true if the alias update was successful, false otherwise
     */
    public boolean updateAlias(final String newIndex) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final String updateAlias = fessConfig.getIndexDocumentUpdateIndex();
        final String searchAlias = fessConfig.getIndexDocumentSearchIndex();