code: protected void refreshPeer (NodeRecord record)
      {
          PeerNode peer = _peers.get(record.nodeName);
          if (peer == null) {
              peer = _injector.getInstance(getPeerNodeClass());
              _peers.put(record.nodeName, peer);
              peer.init(record);
          }
          peer.refresh(record);
      }
docs: Ensures that we have a connection to the specified node if it has checked in since we last
  failed to connect.