public boolean exists() throws SmbException {

        if (attrExpiration > System.currentTimeMillis()) {
            return isExists;
        }

        attributes = ATTR_READONLY | ATTR_DIRECTORY;
        createTime = 0L;
        lastModified = 0L;
        isExists = false;

        try {
            if (url.getHost().length() == 0) {} else if (share == null) {

            log.trace("Using cached attributes (expires in {}ms)", this.attrExpiration - currentTime);
            return this.isExists;
        }

        // Fast path for already resolved existence with recent cache
        if (this.isExists && (currentTime - (this.attrExpiration - getContext().getConfig().getAttributeCacheTimeout())) < 5000) {
            log.trace("Using recent positive existence cache");

        try {
            final IndicesExistsResponse response =
                    client.admin().indices().prepareExists(indexName).execute().actionGet(fessConfig.getIndexSearchTimeout());
            exists = response.isExists();
        } catch (final Exception e) {
            logger.debug("Failed to check index status: indexName={}", indexName, e);
        }
        return exists;
    }

    /**