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問題描述
集線器啟動命令:
java -jar selenium-server-standalone-3.11.0.jar -role hub
節點啟動命令:
java -Dwebdriver.chrome.driver=/Users/alina/Selenium/chromedriver.exe -jar selenium-server-standalone-3.11.0.jar -role webdriver -hub http://192.168.100.4:4444/grid/register/
環境詳細信息(根據評論更新):Selenium 3.11.0、Chrome 66、ChromeDriver 2.38
Environment Details (updated from comments) : Selenium 3.11.0, Chrome 66, ChromeDriver 2.38
import java.net.MalformedURLException;
import java.net.URL;
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.By;
import org.openqa.selenium.Platform;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.openqa.selenium.remote.RemoteWebDriver;
public class TestGrid {
static WebDriver driver;
static String nodeUrl;
public static void main(String[] args)
{
try {
nodeUrl = "http://192.168.100.4:4444/wd/hub";
DesiredCapabilities capabilities = DesiredCapabilities.chrome();
capabilities.setPlatform(Platform.SIERRA);
driver = new RemoteWebDriver(new URL(nodeUrl), capabilities);
driver.manage().deleteAllCookies();
driver.manage().window().maximize();
driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
driver.manage().timeouts().pageLoadTimeout(45, TimeUnit.SECONDS);
driver.get("http://www.amazon.com");
driver.findElement(By.linkText("Today's Deals")).click();
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
當我嘗試運行它時，我得到了這個錯誤:
When I try to run it, I get this error:
Apr 24, 2018 4:14:34 PM org.openqa.selenium.remote.DesiredCapabilities chrome
INFO: Using `new ChromeOptions()` is preferred to `DesiredCapabilities.chrome()`
Exception in thread "main" org.openqa.selenium.WebDriverException: Error forwarding the new session cannot find : Capabilities {browserName: chrome, platform: macOS 10.12, version: }
Command duration or timeout: 90 milliseconds
Build info: version: '3.11.0', revision: 'e59cfb3', time: '2018-03-11T20:33:08.638Z'
System info: host: 'Alinas-MacBook-Pro.local', ip: '2a02:2f0e:1a0:5d9:95f0:9fb4:dfea:28c7%en0', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.13.4', java.version: '10.0.1'
Driver info: driver.version: RemoteWebDriver
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:488)
at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:214)
at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:166)
at org.openqa.selenium.remote.JsonWireProtocolResponse.lambda$new$0(JsonWireProtocolResponse.java:53)
at org.openqa.selenium.remote.JsonWireProtocolResponse.lambda$getResponseFunction$2(JsonWireProtocolResponse.java:91)
at org.openqa.selenium.remote.ProtocolHandshake.lambda$createSession$0(ProtocolHandshake.java:123)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
at java.base/java.util.Spliterators$ArraySpliterator.tryAdvance(Spliterators.java:958)
at java.base/java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:127)
at java.base/java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:502)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:488)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
at java.base/java.util.stream.FindOps$FindOp.evaluateSequential(FindOps.java:150)
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.base/java.util.stream.ReferencePipeline.findFirst(ReferencePipeline.java:543)
at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:126)
at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:73)
at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:136)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:545)
at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:209)
at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:132)
at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:145)
at grid.TestGrid.main(TestGrid.java:26)
Caused by: org.openqa.grid.common.exception.GridException: Error forwarding the new session cannot find : Capabilities {browserName: chrome, platform: macOS 10.12, version: }
at org.openqa.grid.web.servlet.handler.RequestHandler.process(RequestHandler.java:118)
at org.openqa.grid.web.servlet.DriverServlet.process(DriverServlet.java:86)
at org.openqa.grid.web.servlet.DriverServlet.doPost(DriverServlet.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.seleniumhq.jetty9.servlet.ServletHolder.handle(ServletHolder.java:860)
at org.seleniumhq.jetty9.servlet.ServletHandler.doHandle(ServletHandler.java:535)
at org.seleniumhq.jetty9.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188)
at org.seleniumhq.jetty9.server.session.SessionHandler.doHandle(SessionHandler.java:1595)
at org.seleniumhq.jetty9.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188)
at org.seleniumhq.jetty9.server.handler.ContextHandler.doHandle(ContextHandler.java:1253)
at org.seleniumhq.jetty9.server.handler.ScopedHandler.nextScope(ScopedHandler.java:168)
at org.seleniumhq.jetty9.servlet.ServletHandler.doScope(ServletHandler.java:473)
at org.seleniumhq.jetty9.server.session.SessionHandler.doScope(SessionHandler.java:1564)
at org.seleniumhq.jetty9.server.handler.ScopedHandler.nextScope(ScopedHandler.java:166)
at org.seleniumhq.jetty9.server.handler.ContextHandler.doScope(ContextHandler.java:1155)
at org.seleniumhq.jetty9.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.seleniumhq.jetty9.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.seleniumhq.jetty9.server.Server.handle(Server.java:530)
at org.seleniumhq.jetty9.server.HttpChannel.handle(HttpChannel.java:347)
at org.seleniumhq.jetty9.server.HttpConnection.onFillable(HttpConnection.java:256)
at org.seleniumhq.jetty9.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
at org.seleniumhq.jetty9.io.FillInterest.fillable(FillInterest.java:102)
at org.seleniumhq.jetty9.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
at org.seleniumhq.jetty9.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:247)
at org.seleniumhq.jetty9.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:140)
at org.seleniumhq.jetty9.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
at org.seleniumhq.jetty9.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:382)
at org.seleniumhq.jetty9.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:708)
at org.seleniumhq.jetty9.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626)
at java.lang.Thread.run(Thread.java:844)
有誰知道我做錯了什么?
Does anyone know what am I doing wrong?
推薦答案
這個錯誤信息...
Exception in thread "main" org.openqa.selenium.WebDriverException: Error forwarding the new session cannot find : Capabilities {browserName: chrome, platform: macOS 10.12, version: }
...暗示 ChromeDriver 無法啟動與 WebClient 的活動連接，即 Chrome 瀏覽器.
...implies that the ChromeDriver wasn't able to initiate an active connection with the WebClient i.e Chrome browser.
您的主要問題是您使用的二進制文件之間的版本兼容性，如下所示:
Your main issue is the version compatibility between the binaries you are using as follows :
- 您正在使用 chromedriver=2.36
- chromedriver=2.36 的發行說明明確提及以下內容:
支持 Chrome v63-65
- 您正在使用 chrome=66.0
- ChromeDriver v2.38 明確提及以下內容:
- 將 ChromeDriver 升級到當前的 ChromeDriverv2.38 級別.
- 將 Chrome 版本保持在 Chrome v66.x 級別.(根據 ChromeDriver v2.38 發行說明)
- 清理你的項目工作區通過你的IDE和重建你的項目只需要依賴.
- 使用 CCleaner 工具清除之前和在您的測試套件執行之后.
- 如果您的基礎 Web Client 版本太舊，請通過 卸載它Revo Uninstaller 并安裝最新的 GA 和發布版本的 Web Client.
- 進行一次系統重啟.
- 執行你的
@Test. - Upgrade ChromeDriver to current ChromeDriver v2.38 level.
- Keep Chrome version at Chrome v66.x levels. (as per ChromeDriver v2.38 release notes)
- Clean your Project Workspace through your IDE and Rebuild your project with required dependencies only.
- Use CCleaner tool to wipe off all the OS chores before and after the execution of your test Suite.
- If your base Web Client version is too old, then uninstall it through Revo Uninstaller and install a recent GA and released version of Web Client.
- Take a System Reboot.
- Execute your
@Test. Mac OS X:
支持 Chrome v65-67
所以 ChromeDriver 版本 (v2.36) 和 Chrome 瀏覽器 版本 (v66.0)
So there is a clear mismatch between the ChromeDriver version (v2.36) and the Chrome Browser version (v66.0)
根據您在使用 Selenium 3.x 時的問題更新，您需要將關鍵字 webdriver 替換為 node 并刪除擴展名(WebDriver 變體的 .exe) 如下:
As per your question update while working with Selenium 3.x you need to replace the keyword webdriver with node and remove the extension (.exe) of the WebDriver variant as follows :
java -Dwebdriver.chrome.driver=/Users/alina/Selenium/chromedriver -jar selenium-server-standalone-3.11.0.jar -role node -hub http://192.168.100.4:4444/grid/register/
由于您仍然面臨同樣的錯誤，讓我們解決錯誤:
As you are still facing the same error let us address the error :
Using `new ChromeOptions()` is preferred to `DesiredCapabilities.chrome()`
根據錯誤消息，您需要使用 merge() 方法來自 MutableCapabilities 類合并DesiredCapabilities 類型的對象轉換為 ChromeOptions 類型的對象，并通過傳遞 ChromeOptions 對象來啟動 RemoteWebDriver 和 WebClient 實例如下:
As per the error message you need to use the merge() method from MutableCapabilities Class to merge the DesiredCapabilities type of object into ChromeOptions type object and initiate the RemoteWebDriver and WebClient instance by passing the ChromeOptions object as follows :
System.setProperty("webdriver.chrome.driver", "/Users/username/chromedriver");
nodeUrl = "http://192.168.100.4:4444/wd/hub";
DesiredCapabilities capabilities = DesiredCapabilities.chrome();
capabilities.setPlatform(Platform.SIERRA);
ChromeOptions options = new ChromeOptions();
options.merge(capabilities);
driver = new RemoteWebDriver(new URL(nodeUrl), options);
driver.get("http://www.amazon.com");
PS:作為參考，您可以查看 mutablecapabilities 中的討論強>標簽
PS : As a reference you can have a look at the discussions in mutablecapabilities tag
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