Azure Webjob-尝试打开ChromeDriver时超时

时间：2019-02-10 13:00:25

标签： c# azure selenium google-chrome webjob

我正在尝试将Azure WebApp和Webjobs一起用于测试应用程序。 在本地，效果很好。但是当我构建到云时，就会发生上面列出的问题。

似乎已找到该文件，但它一直处于待机状态直到超时。

有人知道如何解决这个问题吗？ 我正在使用C＃Selenium WebDriver。

using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;
using System;
using System.Diagnostics;
using System.IO;

namespace Ololu_WebJob
{
    class Program
    {
        static void Main()
        {
            IWebDriver driver = new ChromeDriver();
            driver.Url = "my_url";

            Console.WriteLine(driver.Title);

            driver.Quit();
        }
    }
}

/*
    LOG:
    [02/10/2019 12:27:51 > 7f9c27: SYS INFO] Status changed to Initializing
    [02/10/2019 12:27:51 > 7f9c27: SYS INFO] Job directory change detected: Job file 'Ololu_WebJob.exe' timestamp differs between source and working directories.
    [02/10/2019 12:27:53 > 7f9c27: SYS INFO] Run script 'chromedriver.exe' with script host - 'WindowsScriptHost'
    [02/10/2019 12:27:53 > 7f9c27: SYS INFO] Status changed to Running
    [02/10/2019 12:27:53 > 7f9c27: INFO] Starting ChromeDriver 2.46.628402 (536cd7adbad73a3783fdc2cab92ab2ba7ec361e1) on port 9515
    [02/10/2019 12:27:53 > 7f9c27: INFO] Only local connections are allowed.
    [02/10/2019 12:27:53 > 7f9c27: INFO] Please protect ports used by ChromeDriver and related test frameworks to prevent access by malicious code.
    [02/10/2019 12:31:55 > 7f9c27: ERR ] Command 'cmd /c ""chromedriv ...' was aborted due to no output nor CPU activity for 121 seconds. You can increase the SCM_COMMAND_IDLE_TIMEOUT app setting (or WEBJOBS_IDLE_TIMEOUT if this is a WebJob) if needed.
    cmd /c ""chromedriver.exe""
    [02/10/2019 12:31:55 > 7f9c27: SYS INFO] Status changed to Failed
    [02/10/2019 12:31:55 > 7f9c27: SYS ERR ] System.AggregateException: One or more errors occurred. ---> Kudu.Core.Infrastructure.CommandLineException: Command 'cmd /c ""chromedriv ...' was aborted due to no output nor CPU activity for 121 seconds. You can increase the SCM_COMMAND_IDLE_TIMEOUT app setting (or WEBJOBS_IDLE_TIMEOUT if this is a WebJob) if needed.
    cmd /c ""chromedriver.exe""
       at Kudu.Core.Infrastructure.IdleManager.WaitForExit(IProcess process) in C:\Kudu Files\Private\src\master\Kudu.Core\Infrastructure\IdleManager.cs:line 45
       at Kudu.Core.Infrastructure.ProcessExtensions.<Start>d__12.MoveNext() in C:\Kudu Files\Private\src\master\Kudu.Core\Infrastructure\ProcessExtensions.cs:line 212
    --- End of stack trace from previous location where exception was thrown ---
       at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
       at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
       at Kudu.Core.Infrastructure.Executable.<ExecuteAsync>d__31.MoveNext() in C:\Kudu Files\Private\src\master\Kudu.Core\Infrastructure\Executable.cs:line 255
       --- End of inner exception stack trace ---
       at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
       at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
       at System.Threading.Tasks.Task`1.get_Result()
       at Kudu.Core.Infrastructure.Executable.ExecuteInternal(ITracer tracer, Func`2 onWriteOutput, Func`2 onWriteError, Encoding encoding, String arguments, Object[] args) in C:\Kudu Files\Private\src\master\Kudu.Core\Infrastructure\Executable.cs:line 216
       at Kudu.Core.Infrastructure.Executable.ExecuteReturnExitCode(ITracer tracer, Action`1 onWriteOutput, Action`1 onWriteError, String arguments, Object[] args) in C:\Kudu Files\Private\src\master\Kudu.Core\Infrastructure\Executable.cs:line 165
       at Kudu.Core.Jobs.BaseJobRunner.RunJobInstance(JobBase job, IJobLogger logger, String runId, String trigger, ITracer tracer, Int32 port) in C:\Kudu Files\Private\src\master\Kudu.Core\Jobs\BaseJobRunner.cs:line 272
    ---> (Inner Exception #0) ExitCode: -1, Output: Command 'cmd /c ""chromedriv ...' was aborted due to no output nor CPU activity for 121 seconds. You can increase the SCM_COMMAND_IDLE_TIMEOUT app setting (or WEBJOBS_IDLE_TIMEOUT if this is a WebJob) if needed., Error: Command 'cmd /c ""chromedriv ...' was aborted due to no output nor CPU activity for 121 seconds. You can increase the SCM_COMMAND_IDLE_TIMEOUT app setting (or WEBJOBS_IDLE_TIMEOUT if this is a WebJob) if needed., Kudu.Core.Infrastructure.CommandLineException: Command 'cmd /c ""chromedriv ...' was aborted due to no output nor CPU activity for 121 seconds. You can increase the SCM_COMMAND_IDLE_TIMEOUT app setting (or WEBJOBS_IDLE_TIMEOUT if this is a WebJob) if needed.
    cmd /c ""chromedriver.exe""
       at Kudu.Core.Infrastructure.IdleManager.WaitForExit(IProcess process) in C:\Kudu Files\Private\src\master\Kudu.Core\Infrastructure\IdleManager.cs:line 45
       at Kudu.Core.Infrastructure.ProcessExtensions.<Start>d__12.MoveNext() in C:\Kudu Files\Private\src\master\Kudu.Core\Infrastructure\ProcessExtensions.cs:line 212
    --- End of stack trace from previous location where exception was thrown ---
       at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
       at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
       at Kudu.Core.Infrastructure.Executable.<ExecuteAsync>d__31.MoveNext() in C:\Kudu Files\Private\src\master\Kudu.Core\Infrastructure\Executable.cs:line 255<---

*/

1 个答案:

答案 0 :(得分：0)

根据我的经验，如果没有在Azure WebApp上安装Chrome或Chromium实例，就不能直接使用Selenium和chromedriver，如下所述ChromeDriver Setup的要求。

  
      
  • 确保Chromium / Google Chrome安装在可识别的位置
    •   
     

ChromeDriver希望您将Chrome安装在平台的默认位置。您还可以通过设置特殊功能来强制ChromeDriver使用自定义位置。

但是，由于Azure WebApp沙箱的某些限制（包括Win32k.sys (User32/GDI32) Restrictions和Local Address Requests），即使您上载了Chrome或Chromium的便携式发行版，也无法通过chromedriver启动没有GDI支持的Chrome或Chromium进入Azure WebApp和配置的环境变量。

尽管您的错误信息未在C＃代码中指出问题的真正原因，但我还是在Azure WebApp上的Python中获得了错误信息，如下所示。

enter image description here

因此，一种解决方法是直接在Azure VM上使用硒和chromedriver。或者考虑您的情况，可以在Azure VM的默认端口chromedriver上启动9515并配置VM NSG角色以允许端口9515的入站，然后使用类OpenQA.Selenium.Remote.RemoteWebDriver进行连接Azure WebJob中的远程Webdriver。

以下是来自C# (CSharp) OpenQA.Selenium.Remote RemoteWebDriver.FindElement Examples的RemoteWebDriver使用示例代码

IWebDriver webDriver = new RemoteWebDriver(new Uri("http://<vm host ip>:9515"), DesiredCapabilities.Chrome());
相关问题
最新问题