if ( log.isTraceEnabled() ) {
            log.trace("Resolving root " + root);
        }
        /*
         * The link entries contain maps of referrals by path representing DFS links.
         * Note that paths are relative to the root like "\" and not "\example.com\root".
         */
        CacheEntry<DfsReferralDataInternal> links = roots.get(root);
        if ( links != null && now > links.expiration ) {