}
@Override
public long serverOpen() {
OpenChannelsHandler channels = serverOpenChannels;
return channels == null ? 0 : channels.numberOfOpenChannels();
}
@Override
public void sendRequest(final DiscoveryNode node, final long requestId, final String action, final TransportRequest request, TransportRequestOptions options) throws IOException, TransportException {
Channel targetChannel = nodeChannel(node, options);