return true;
        } catch (final Exception e) {
            logger.warn("Failed to add {} to {}", id, index, e);
        }
        return false;
    }

    public static boolean existsIndex(final IndicesAdminClient indicesClient, final String index, final boolean expandWildcardsOpen,
            final boolean expandWildcardsClosed) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        try {