if(log.isInfoEnabled()) log.info(local_addr + " became client");
if(log.isDebugEnabled()) log.debug(local_addr + " became client");
    public void becomeClient() {        ClientGmsImpl tmp=(ClientGmsImpl)impls.get(CLIENT);        if(tmp == null) {            tmp=new ClientGmsImpl(this);            impls.put(CLIENT, tmp);        }        tmp.initial_mbrs.removeAllElements();        setImpl(tmp);         if(log.isInfoEnabled()) log.info(local_addr + " became client");    }