Question

我是不熟悉Java的Selenium。遵循了在线教程，并尝试执行以下代码，但收到错误消息

未知错误：DevTools活动端口文件不存在Java硒。

我在Google上冲浪并添加了options参数，但没有任何效果。

package mainfiles;

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.chrome.ChromeOptions;

public class MainClass {

    static WebDriver driver;        

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        System.setProperty("webdriver.chrome.driver", "E:\\Selenium\\Latest jar files\\chromedriver.exe");
        ChromeOptions options = new ChromeOptions();
        //options.setExperimentalOption("useAutomationExtension", false);
        options.addArguments("--headless");
        options.addArguments("--disable-extensions"); // disabling extensions
        options.addArguments("--disable-gpu"); // applicable to windows os only
        options.addArguments("--disable-dev-shm-usage"); // overcome limited resource problems
        options.addArguments("--no-sandbox");
        driver =new ChromeDriver();
        driver.get("www.gmail.com");
        }

}

运行此程序时，出现以下错误

Starting ChromeDriver 2.40.565498 (ea082db3280dd6843ebfb08a625e3eb905c4f5ab) on port 36409
Only local connections are allowed.
Exception in thread "main" org.openqa.selenium.WebDriverException: unknown error: DevToolsActivePort file doesn't exist
  (Driver info: chromedriver=2.40.565498 (ea082db3280dd6843ebfb08a625e3eb905c4f5ab),platform=Windows NT 10.0.10240 x86_64) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 60.13 seconds
Build info: version: '3.13.0', revision: '2f0d292', time: '2018-06-25T15:32:14.902Z'
System info: host: 'DESKTOP-6O850P3', ip: '172.20.10.3', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_171'
Driver info: driver.version: ChromeDriver
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    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.util.stream.ReferencePipeline$3$1.accept(Unknown Source)
    at java.util.Spliterators$ArraySpliterator.tryAdvance(Unknown Source)
    at java.util.stream.ReferencePipeline.forEachWithCancel(Unknown Source)
    at java.util.stream.AbstractPipeline.copyIntoWithCancel(Unknown Source)
    at java.util.stream.AbstractPipeline.copyInto(Unknown Source)
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source)
    at java.util.stream.FindOps$FindOp.evaluateSequential(Unknown Source)
    at java.util.stream.AbstractPipeline.evaluate(Unknown Source)
    at java.util.stream.ReferencePipeline.findFirst(Unknown Source)
    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.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:83)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:548)
    at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:212)
    at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:130)
    at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:181)
    at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:168)
    at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:123)
    at mainfiles.MainClass.main(MainClass.java:22)

Answer 1

此错误是由于您使用的ChromeDriver版本和Chrome浏览器版本不兼容造成的。请使用最新的Chrome driver.exe（v2.41）和最新的Chrome浏览器68版本。它对我有用。

Answer 2

@Samraj降级到Chromedriver 2.38在Windows 10 Chrome 66.0.3359.181上为我工作

只需根据页面chromedriver.chromium.org/downloads

尝试降级或升级 Chromedriver版本

并从此页面chromedriver.storage.googleapis.com/index.html

下载相应的版本

未知错误：DevTools活动端口文件不存在Java硒

2 个答案: