如何在集线器中注册节点后启动远程webdriver？

我正在尝试启动remoteWebdriver，因为我已经逐步创建了一个集线器，然后我在其上添加了一个节点。 这很好。我执行时的问题：

Thread.currentThread().join(); 

程序停止执行，如果我删除此行，我会收到错误。

 try{ String strIP = "localhost"; GridHubConfiguration config = new GridHubConfiguration(); config.setTimeout(30000000); config.setPort(4444); config.setHost(strIP); Hub hub = new Hub(config); hub.start(); RegistrationRequest req = new RegistrationRequest(); req.setRole(GridRole.NODE); Map nodeConfiguration = new HashMap(); nodeConfiguration.put(RegistrationRequest.PROXY_CLASS, DefaultRemoteProxy.class.getName()); nodeConfiguration.put(RegistrationRequest.MAX_SESSION, 5); nodeConfiguration.put(RegistrationRequest.PORT, 5555); nodeConfiguration.put(RegistrationRequest.HOST, 4444); nodeConfiguration.put(RegistrationRequest.AUTO_REGISTER, true); nodeConfiguration.put(RegistrationRequest.REGISTER_CYCLE, 5000); nodeConfiguration.put(RegistrationRequest.HUB_HOST, "localhost"); nodeConfiguration.put(RegistrationRequest.HUB_PORT, 4444); nodeConfiguration.put("remoteHost", "http://" + strIP + ":5555"); nodeConfiguration.put("url", "http://" + strIP + ":5555"); nodeConfiguration.put("role", "node"); nodeConfiguration.put("hub", "http://localhost:4444/grid/register"); URL remoteURL = new URL("http://" + strIP + ":5555"); nodeConfiguration.put(RegistrationRequest.REMOTE_HOST, remoteURL.toExternalForm()); req.setConfiguration(nodeConfiguration); DesiredCapabilities capabilities2 = DesiredCapabilities.chrome(); capabilities2.setCapability("browserName", "chrome"); capabilities2.setCapability("platform", "WINDOWS"); capabilities2.setCapability("ensureCleanSession", "true"); capabilities2.setCapability("maxInstances", 5); req.addDesiredCapability(capabilities2); SelfRegisteringRemote remote = new SelfRegisteringRemote(req); remote.setRemoteServer(new SeleniumServer(req.getConfiguration())); remote.startRemoteServer(); remote.startRegistrationProcess(); WebDriver driver = new RemoteWebDriver(new URL("http://localhost:4444/wd/register"),DesiredCapabilities.chrome()); Thread.currentThread().join(); String URL="http://localhost:4444/wd/hub"; WebDriver driver = new RemoteWebDriver(new URL(URL),DesiredCapabilities.chrome()); driver.get("https://www.youtube.com"); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); }