} catch (final Throwable t) {
            logger.warn("Failed to set SessionTrackingMode.", t);
        }

        split(fessConfig.getQueryFacetQueries(), "\n").of(stream -> stream.map(String::trim).filter(StringUtil::isNotEmpty).forEach(s -> {
            final String[] values = StringUtils.split(s, ":", 2);
            if (values.length != 2) {
                return;