protected void handleCacheRequest(Address sender) {
        int view_size=view != null? view.size() : 0;
        if(view_size == 0)
            return;
        for(Address addr: view.getMembersRaw()) {
            if(Objects.equals(addr, sender))
                continue;
            String logical_name=NameCache.get(addr);
            if(logical_name == null)
                continue;
            Header hdr=new Header(Type.CACHE_RSP, addr, logical_name);
            Message msg=new Message(sender).putHeader(id, hdr);
            if(log.isTraceEnabled())
                log.trace("%s: sending %s to %s", local_addr, hdr, sender);
            try {
                down_prot.down(msg);
            }
            catch(Throwable t) {
                log.error("failed sending CACHE_RSP", t);
            }
        }
    }