SessionNotCreatedException:消息:无法创建新服务:通过Python和ChromeDriver和SeleniumGrid的ChromeDriverService

时间:2018-10-16 02:12:44

标签: python selenium selenium-webdriver selenium-chromedriver selenium-grid

嗨,任何人都知道这是怎么回事或如何调试以下错误。我所做的步骤是使用安装中心命令并将节点注册到中心。在命令注册节点之后。我可以看到日志为

The node is registered to the hub and ready to use 

但是,当我运行测试脚本时,我将错误打印为:

selenium.common.exceptions.SessionNotCreatedException: Message: Unable to create new service: ChromeDriverService

二进制版本:

  • 硒独立版本:3.14.0
  • 硒远程驱动程序版本:selenium == 3.14.1
  • python版本:3.6.4

脚本:

import os
from selenium import webdriver
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities

driver = webdriver.Remote(command_executor='http://localhost:4444/wd/hub',
                          desired_capabilities=DesiredCapabilities.CHROME)

设置中心:

#java -jar /Users/admin/selenium-server-standalone-3.14.0.jar -host localhost -role hub

注册节点:

#java -jar /Users/admin/selenium-server-standalone-3.14.0.jar -role node

错误:

E       selenium.common.exceptions.SessionNotCreatedException: Message: Unable to create new service: ChromeDriverService
E       Build info: version: '3.14.0', revision: 'aacccce0', time: '2018-08-02T20:13:22.693Z'
E       Driver info: driver.version: unknown
E       Stacktrace:
E           at org.openqa.selenium.remote.server.ServicedSession$Factory.lambda$get$0 (ServicedSession.java:134)
E           at org.openqa.selenium.remote.server.ServicedSession$Factory.apply (ServicedSession.java:151)
E           at org.openqa.selenium.remote.server.ActiveSessionFactory.lambda$apply$12 (ActiveSessionFactory.java:177)
E           at java.util.stream.ReferencePipeline$3$1.accept (ReferencePipeline.java:193)
...
E           at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:511)
E           at java.util.concurrent.FutureTask.run (FutureTask.java:266)
E           at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1142)
E           at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:617)
E           at java.lang.Thread.run (Thread.java:745)

../lib/python3.6/site-packages/selenium/webdriver/remote/errorhandler.py:242: SessionNotCreatedException

1 个答案:

答案 0 :(得分:1)

此错误消息...

selenium.common.exceptions.SessionNotCreatedException: Message: Unable to create new service: ChromeDriverService

...表示 ChromeDriver 无法启动/产生新的 ChromeDriverService

正在使用的二进制版本之间,在命令不兼容中存在两个问题:

  • 您的 JDK版本 1.8.0_91 ,这是古老的
  • JDK 升级到最新级别JDK 8u181
  • 要注册 Selenium Grid Hub ,您需要使用以下命令:

    >java -jar /Users/admin/selenium-server-standalone-3.14.0.jar -role hub
    
  • 要为 ChromeDriver Chrome 注册 Selenium Grid节点,您需要传递 ChromeDriver的绝对路径以及注册URI Key Value ,如下所示:

    >java -Dwebdriver.chrome.driver=/path/to/chromedriver.exe -jar /Users/admin/selenium-server-standalone-3.14.0.jar -role node -hub http://<IP_GRID_HUB>:4444/grid/register
    
  • 您的代码块对我来说很好。