我试图用一个URL启动chrome浏览器,浏览器启动后,它什么也不做。
1分钟后我看到如下错误:
Unable to open browser with url: 'https://www.google.com' (Root cause: org.openqa.selenium.WebDriverException: unknown error: DevToolsActivePort file doesn't exist
(Driver info: chromedriver=2.39.562718 (9a2698cba08cf5a471a29d30c8b3e12becabb0e9),platform=Windows NT 10.0.15063 x86_64) (WARNING: The server did not provide any stacktrace information)
我的配置:
Chrome浏览器:66
ChromeBrowser: 2.39.56
又及,在Firefox中一切都很好
由于这是针对这类错误的最活跃的消息,所以我想提一下我的解决方案(在花了几个小时来修复这个问题之后)。
On Ubuntu 18.04, using Chrome 70 and Chromedriver 2.44, and Python3 I kept getting the same DevToolsActivePort error, even when I disabled all options listed above. The chromedriver log file as well as ps showed that the chromedriver I set in chrome_options.binary_location was running, but it always gave DevToolsActivePort error. When I removed chrome_options.binary_location='....' and add it to webdriver creation, I get it working fine.
webdriver.Chrome('/path to ... /chromedriver',chrome_options=chrome_options)
感谢大家的意见,让我理解并解决了这个问题。
I started seeing this problem on Monday 2018-06-04. Our tests run each weekday. It appears that the only thing that changed was the google-chrome version (which had been updated to current) JVM and Selenium were recent versions on Linux box ( Java 1.8.0_151, selenium 3.12.0, google-chrome 67.0.3396.62, and xvfb-run).
Specifically adding the arguments "--no-sandbox" and "--disable-dev-shm-usage" stopped the error.
I'll look into these issues to find more info about the effect, and other questions as in what triggered google-chrome to update.
ChromeOptions options = new ChromeOptions();
...
options.addArguments("--no-sandbox");
options.addArguments("--disable-dev-shm-usage");
更新conf.js中的功能
exports.config = {
seleniumAddress: 'http://localhost:4444/wd/hub',
specs: ['todo-spec.js'],
capabilities: {
browserName: 'chrome',
chromeOptions: {
args: ['--disable-gpu', '--no-sandbox', '--disable-extensions', '--disable-dev-shm-usage']
}
},
};
有很多可能的原因导致RESPONSE InitSession ERROR unknown ERROR: DevToolsActivePort文件不存在错误消息(正如我们可以从这个问题的答案数量中看到的)。因此,让我们更深入地解释这个错误消息的确切含义。
根据chromedriver源代码,消息是在ParseDevToolsActivePortFile方法中创建的。此方法在启动chrome进程后从循环中调用。
在循环中,驱动程序检查chrome进程是否仍在运行,如果ParseDevToolsActivePortFile文件已经由chrome创建。这个循环有一个硬编码的60s超时。
我认为这条信息可能有两个原因:
Chrome在启动过程中非常慢——例如由于缺乏系统资源——主要是CPU或内存。在这种情况下,它可以发生,有时铬管理开始在时间限制,有时不是。
还有一个问题,防止chrome启动-缺失或破碎的依赖,错误的配置等。在这种情况下,这个错误消息并没有真正的帮助,您应该找到另一个日志消息来解释失败的真正原因。