for (;;) {
            resolveDfs(request);
            try {
                tree.send(request, response);
                break;
            } catch (final DfsReferral dre) {
                if (dre.resolveHashes) {
                    throw dre;
                }
                request.reset();
            }
        }
    }

    static String queryLookup(final String query, final String param) {