*/
                CacheEntry links = (CacheEntry)roots.get(root);
                if (links != null && now > links.expiration) {
                    roots.remove(root);
                    links = null;
                }

                if (links == null) {
                    if ((trans = getDc(domain, auth)) == null)
                        return null;

        }

        if ( links == null ) {
            log.trace("Loadings roots");
            String refServerName = domain;
            dr = fetchRootReferral(tf, domain, root, refServerName);
            links = cacheRootReferral(tf, domain, root, roots, dr, links);
        }
        else if ( links instanceof NegativeCacheEntry ) {
            links = null;
        }
        else {