_req.execute();
try { _req.execute(); } catch(Exception e) { throw new RuntimeException("failed executing request " + _req, e); }
    public RspList castMessage(Vector dests, Message msg, int mode, long timeout) {        GroupRequest _req=null;        Vector real_dests=dests != null? (Vector)dests.clone() : (Vector)members.clone();        // This marks message as sent by us ! (used in up()        // msg.addHeader(new MsgProtHeader(getName()));   ++ already done by RequestCorrelator        _req=new GroupRequest(msg, _corr, real_dests, mode, timeout, 0);        _req.execute();        return _req.getResults();    }