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selenium - 测试立即失败,出现未知错误 : DevToolsActivePort file doesn't exist when running Selenium grid through systemd

转载 作者:太空宇宙 更新时间:2023-11-03 17:20:24 27 4
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我一直在尝试将启动 Selenium 网格服务的方式从 .rclocal 中的 shell 脚本更改为 systemd 服务,但它不起作用。脚本是这样的:


#!/bin/bash
java -jar /opt/selenium-server-standalone.jar -role hub -hubConfig hubconfig.json
xvfb-run --server-args="-screen 0 2048x1536x24" java -jar /opt/selenium-server-standalone.jar -role
node -nodeConfig nodeconfig.json

我创建了两个不同的服务,如下所示:

(Stackoverflow 不允许我放置服务内容,因为它说格式不正确)

服务正常启动:

selenium-hub


● selenium-hub.service - Selenium service
Loaded: loaded (/etc/systemd/system/selenium-hub.service; disabled; vendor preset: disabled)
Active: active (running) since Tue 2019-10-01 15:53:10 UTC; 2min 41s ago
Main PID: 23803 (java)
CGroup: /system.slice/selenium-hub.service
└─23803 /bin/java -jar /opt/selenium-server-standalone.jar -role hub -hubConfig /home/selenium/hubconfig.json

Oct 01 15:53:12 vm java[23803]: 15:53:12.163 INFO - Selenium build info: version: '3.9.1', revision: '63f7b50'
Oct 01 15:53:12 vm java[23803]: 15:53:12.164 INFO - Launching Selenium Grid hub on port 4444
Oct 01 15:53:13 vm java[23803]: 2019-10-01 15:53:13.384:INFO::main: Logging initialized @2790ms to org.seleniumhq.jetty9.util.log.StdErrLog
Oct 01 15:53:13 vm java[23803]: 2019-10-01 15:53:13.492:INFO:osjs.Server:main: jetty-9.4.7.v20170914, build timestamp: 2017-11-21T21:27:37Z, git hash: 82b8fb23f757335bb3329d540ce37a2a2615f0a8
Oct 01 15:53:13 vm java[23803]: 2019-10-01 15:53:13.524:INFO:osjs.session:main: DefaultSessionIdManager workerName=node0
Oct 01 15:53:13 vm java[23803]: 2019-10-01 15:53:13.524:INFO:osjs.session:main: No SessionScavenger set, using defaults
Oct 01 15:53:13 vm java[23803]: 2019-10-01 15:53:13.529:INFO:osjs.session:main: Scavenging every 660000ms
Oct 01 15:53:13 vm java[23803]: 2019-10-01 15:53:13.538:INFO:osjsh.ContextHandler:main: Started o.s.j.s.ServletContextHandler@60704c{/,null,AVAILABLE}
Oct 01 15:53:13 vm java[23803]: 2019-10-01 15:53:13.562:INFO:osjs.AbstractConnector:main: Started ServerConnector@1fe20588{HTTP/1.1,[http/1.1]}{0.0.0.0:4444}
Oct 01 15:53:13 vm java[23803]: 2019-10-01 15:53:13.562:INFO:osjs.Server:main: Started @2968ms
Oct 01 15:53:13 vm java[23803]: 15:53:13.562 INFO - Selenium Grid hub is up and running
Oct 01 15:53:13 vm java[23803]: 15:53:13.562 INFO - Nodes should register to http://1.2.3.4:4444/grid/register/
Oct 01 15:53:13 vm java[23803]: 15:53:13.562 INFO - Clients should connect to http://1.2.3.4:4444/wd/hub
Oct 01 15:53:14 vm java[23803]: 15:53:14.797 INFO - Registered a node http://1.2.3.4:5555

Selenium 节点:


● selenium-node.service - Selenium nodes
Loaded: loaded (/etc/systemd/system/selenium-node.service; disabled; vendor preset: disabled)
Active: active (running) since Tue 2019-10-01 15:53:10 UTC; 6min ago
Main PID: 23813 (xvfb-run)
CGroup: /system.slice/selenium-node.service
├─23813 /bin/sh /bin/xvfb-run --server-args="-screen 0 2048x1536x24" java -jar /opt/selenium-server-standalone.jar -role node -nodeConfig /home/selenium/nodeconfig.json
├─23856 java -jar /opt/selenium-server-standalone.jar -role node -nodeConfig /home/selenium/nodeconfig.json
├─24326 /usr/local/bin/chromedriver --port=1713
├─24327 /usr/local/bin/chromedriver --port=26741
├─24328 /usr/local/bin/chromedriver --port=20065
├─24329 /usr/local/bin/chromedriver --port=6459
├─24331 /usr/local/bin/chromedriver --port=15872
├─24332 /usr/local/bin/chromedriver --port=29475
├─24333 /usr/local/bin/chromedriver --port=30216
├─24334 /usr/local/bin/chromedriver --port=6955
├─24558 /usr/local/bin/chromedriver --port=2425
├─24559 /usr/local/bin/chromedriver --port=19304
├─24560 /usr/local/bin/chromedriver --port=12150
├─24561 /usr/local/bin/chromedriver --port=26147
├─24562 /usr/local/bin/chromedriver --port=16545
├─24570 /usr/local/bin/chromedriver --port=12780
├─24602 /usr/local/bin/chromedriver --port=10959
├─24603 /usr/local/bin/chromedriver --port=8970
├─24753 /usr/local/bin/chromedriver --port=13438
├─24754 /usr/local/bin/chromedriver --port=15725
└─24772 /usr/local/bin/chromedriver --port=28829

Oct 01 15:55:19 vm xvfb-run[23813]: Starting ChromeDriver 77.0.3865.40 (f484704e052e0b556f8030b65b953dce96503217-refs/branch-heads/3865@{#442}) on port 15725
Oct 01 15:55:19 vm xvfb-run[23813]: Only local connections are allowed.
Oct 01 15:55:19 vm xvfb-run[23813]: 15:55:19.112 INFO - /session: Executing POST on /session (handler: BeginSession)
Oct 01 15:55:19 vm xvfb-run[23813]: 15:55:19.113 INFO - Capabilities are: Capabilities {browserName: chrome, goog:chromeOptions: {args: [enable-automation, disable-infobars, disable-notifications, no-sandbox, --disable-dev-shm
Oct 01 15:55:19 vm xvfb-run[23813]: 15:55:19.114 INFO - Capabilities {browserName: chrome, goog:chromeOptions: {args: [enable-automation, disable-infobars, disable-notifications, no-sandbox, --disable-dev-shm-usage, window-siz
Oct 01 15:55:19 vm xvfb-run[23813]: 15:55:19.115 INFO - Found handler: org.openqa.selenium.remote.server.commandhandler.BeginSession@53702c02
Oct 01 15:55:19 vm xvfb-run[23813]: 15:55:19.115 INFO - Found handler: org.openqa.selenium.remote.server.commandhandler.BeginSession@4ae12041
Oct 01 15:55:19 vm xvfb-run[23813]: 15:55:19.116 INFO - /session: Executing POST on /session (handler: BeginSession)
Oct 01 15:55:19 vm xvfb-run[23813]: 15:55:19.117 INFO - Capabilities are: Capabilities {browserName: chrome, goog:chromeOptions: {args: [enable-automation, disable-infobars, disable-notifications, no-sandbox, --disable-dev-shm
Oct 01 15:55:19 vm xvfb-run[23813]: 15:55:19.118 INFO - Capabilities {browserName: chrome, goog:chromeOptions: {args: [enable-automation, disable-infobars, disable-notifications, no-sandbox, --disable-dev-shm-usage, window-siz
Oct 01 15:55:19 vm xvfb-run[23813]: 15:55:19.118 INFO - /session: Executing POST on /session (handler: BeginSession)
Oct 01 15:55:19 vm xvfb-run[23813]: 15:55:19.120 INFO - Capabilities are: Capabilities {browserName: chrome, goog:chromeOptions: {args: [enable-automation, disable-infobars, disable-notifications, no-sandbox, --disable-dev-shm
Oct 01 15:55:19 vm xvfb-run[23813]: 15:55:19.120 INFO - Capabilities {browserName: chrome, goog:chromeOptions: {args: [enable-automation, disable-infobars, disable-notifications, no-sandbox, --disable-dev-shm-usage, window-siz
Oct 01 15:55:19 vm xvfb-run[23813]: 15:55:19.121 INFO - /session: Executing POST on /session (handler: BeginSession)
Oct 01 15:55:19 vm xvfb-run[23813]: 15:55:19.123 INFO - Capabilities are: Capabilities {browserName: chrome, goog:chromeOptions: {args: [enable-automation, disable-infobars, disable-notifications, no-sandbox, --disable-dev-shm
Oct 01 15:55:19 vm xvfb-run[23813]: 15:55:19.123 INFO - Capabilities {browserName: chrome, goog:chromeOptions: {args: [enable-automation, disable-infobars, disable-notifications, no-sandbox, --disable-dev-shm-usage, window-siz
Oct 01 15:55:19 vm xvfb-run[23813]: 15:55:19.124 INFO - /session: Executing POST on /session (handler: BeginSession)
Oct 01 15:55:19 vm xvfb-run[23813]: 15:55:19.139 INFO - Capabilities are: Capabilities {browserName: chrome, goog:chromeOptions: {args: [enable-automation, disable-infobars, disable-notifications, no-sandbox, --disable-dev-shm
Oct 01 15:55:19 vm xvfb-run[23813]: 15:55:19.139 INFO - Capabilities {browserName: chrome, goog:chromeOptions: {args: [enable-automation, disable-infobars, disable-notifications, no-sandbox, --disable-dev-shm-usage, window-siz
Oct 01 15:55:19 vm xvfb-run[23813]: Starting ChromeDriver 77.0.3865.40 (f484704e052e0b556f8030b65b953dce96503217-refs/branch-heads/3865@{#442}) on port 26147
Oct 01 15:55:19 vm xvfb-run[23813]: Only local connections are allowed.
Oct 01 15:55:19 vm xvfb-run[23813]: Please protect ports used by ChromeDriver and related test frameworks to prevent access by malicious code.

但是所有测试都失败并出现相同的错误:

OpenQA.Selenium.WebDriverException: unknown error: Chrome failed to start: exited abnormally
(unknown error: DevToolsActivePort file doesn't exist)
(The process started from chrome location /usr/bin/google-chrome is no longer running, so ChromeDriver is assuming that Chrome has crashed.)
Build info: version: '3.9.1', revision: '63f7b50', time: '2018-02-07T22:42:28.403Z'

DevToolsActivePort 的问题源自/dev/shm 太小,有时会使浏览器崩溃( https://stackoverflow.com/a/50642913/5364231https://bugs.chromium.org/p/chromium/issues/detail?id=736452#c64 )所以我已经添加了 --disable-dev-shm-usage 到功能。

我认为,问题在于服务 selenium-hub 无法与 selenium-node 通信。非常感谢任何帮助。

最佳答案

拇指法则

A common cause for Chrome to crash during startup is running Chrome as root user (administrator) on Linux. While it is possible to work around this issue by passing --no-sandbox flag when creating your WebDriver session, such a configuration is unsupported and highly discouraged. You need to configure your environment to run Chrome as a regular user instead.


这个错误信息...

OpenQA.Selenium.WebDriverException: unknown error: Chrome failed to start: exited abnormally
(unknown error: DevToolsActivePort file doesn't exist)
(The process started from chrome location /usr/bin/google-chrome is no longer running, so ChromeDriver is assuming that Chrome has crashed.)
Build info: version: '3.9.1', revision: '63f7b50', time: '2018-02-07T22:42:28.403Z'

...表示 ChromeDriver 无法启动/生成新的 WebBrowser,即 Chrome 浏览器 session 。


您的主要问题是您使用的二进制文件版本之间的不兼容,如下所示:

  • 您使用的是最新的 chromedriver=77.0
  • 推测您正在使用 chrome= 77.0
  • 您的 Selenium 客户端 版本是 3.9.12018-02-07T22:42:28.403Z 几乎是 1.5 岁。

因此 Selenium 客户端 v3.9.1ChromeDriver v77.0Chrome 浏览器 v77.0 之间存在明显的不匹配/p>


解决方案

确保:

  • JDK 已升级到当前级别 JDK 8u221 .
  • Selenium 已升级到当前级别 Version 3.141.59 .
  • ChromeDriver 已更新为当前 ChromeDriver v77.0水平。
  • Chrome 已更新到当前 Chrome 版本 77.0 级别。 (根据 ChromeDriver v77.0 release notes )
  • 清理您的项目工作区,通过您的IDE重建您的项目,仅使用所需的依赖项。
  • 如果您的 Web Client 基础版本太旧,则将其卸载并安装最新的 GA 和发布版本的 Web Client
  • 系统重启
  • 非root用户身份执行您的@Test

引用

您可以在以下位置找到一些详细的讨论:


结尾

这是 Sandbox 的链接故事。

关于selenium - 测试立即失败,出现未知错误 : DevToolsActivePort file doesn't exist when running Selenium grid through systemd,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/58189108/

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