}
@Override
protected void doStart() throws ElasticsearchException {
this.serverOpenChannels = new OpenChannelsHandler(logger);
/* we do not support oio for websocket - it wouldn't work either */
serverBootstrap = new ServerBootstrap(new NioServerSocketChannelFactory(
Executors.newCachedThreadPool(daemonThreadFactory(settings, "websocket_server_boss")),
Executors.newCachedThreadPool(daemonThreadFactory(settings, "websocket_server_worker")),