使用Selenium网格的Appium导致-GridException:无法从请求中提取功能

我们希望使用Selenium网格并行运行现有的Appium测试

Env:macOS，独立的selenium服务器：3.141.59，appium:1.17.1。我连接了两台android设备

selenium网格服务器日志中的错误消息：

/wd/hub/session java.io.IOException: org.openqa.grid.common.exception.GridException: Cannot extract a capabilities from the request: {
{
  "desiredCapabilities": {
    "app": "\u002fUsers\u002fhome\u002fsrc\u002fmobile-android\u002fapp\u002fbuild\u002foutputs\u002fapk\u002fvanilla\u002fdebug\u002fvanilla-local-debug-DEV.apk",
    "appPackage": "com.example.android.apps.connectmobile",
    "disableWindowAnimation": true,
    "noReset": true,
    "noSign": true,
    "appWaitActivity": "com.example.android.apps.connectmobile.myday.AnActivity",
    "deviceName": "wenda",
    "fullReset": false,
    "appWaitDuration": 5000,
    "skipUninstall": true,
    "newCommandTimeout": 180,
    "platformVersion": "9",
    "automationName": "UiAutomator2",
    "platformName": "Android",
    "udid": "520032834252c58d",
    "printPageSourceOnFindFailure": true
  },
  "capabilities": {
    "firstMatch": [
      {
        "appium:app": "\u002fUsers\u002fhome\u002fsrc\u002fmobile-android\u002fapp\u002fbuild\u002foutputs\u002fapk\u002fvanilla\u002fdebug\u002fvanilla-local-debug-DEV.apk",
        "appium:appPackage": "com.example.android.apps.connectmobile",
        "appium:appWaitActivity": "com.example.android.apps.connectmobile.myday.AnActivity",
        "appium:appWaitDuration": 5000,
        "appium:automationName": "UiAutomator2",
        "appium:deviceName": "wenda",
        "appium:disableWindowAnimation": true,
        "appium:fullReset": false,
        "appium:newCommandTimeout": 180,
        "appium:noReset": true,
        "appium:noSign": true,
        "platformName": "android",
        "appium:platformVersion": "9",
        "printPageSourceOnFindFailure": true,
        "skipUninstall": true,
        "appium:udid": "520032834252c58d"
      }
    ]
  }
}

我们正在使用JUnit执行测试，并创建一个具有上述所需功能的AndroidDriver

   val appiumServerUrl =  URL("http://localhost:4444/wd/hub")
   val androidDriver =  AndroidDriver<MobileElement>(appiumServerUrl, capabilities)

nodeconfig-wenda.json文件应与所需的功能相匹配

{
  "capabilities":
  [
    {
        "app": "/Users/home/src/mobile-android/app/build/outputs/apk/vanilla/debug/vanilla-local-debug-DEV.apk",
         "appPackage": "com.example.android.apps.connectmobile",
         "disableWindowAnimation": true,
         "noReset": true,
         "noSign": true,
         "appWaitActivity": "com.example.android.apps.connectmobile.myday.AnActivity",
         "deviceName": "wenda",
         "fullReset": false,
         "appWaitDuration": 5000,
         "skipUninstall": true,
         "newCommandTimeout": 180,
         "platformVersion": "9",
         "automationName": "UiAutomator2",
         "platformName": "Android",
         "udid": "520032834252c58d",
         "printPageSourceOnFindFailure": true
    }
  ],
  "configuration":
  {
    "cleanUpCycle":2000,
    "timeout":30000,
    "proxy": "org.openqa.grid.selenium.proxy.DefaultRemoteProxy",
    "maxSession": 1,
    "register": true,
    "registerCycle": 5000,
    "hubPort": 4444,
    "hubHost": "127.0.0.1",
    "hubProtocol": "http"
  }
}

错误消息“无法从请求中提取功能”无助于理解问题。互联网上还有其他问题试图解决这类问题，但它们对我没有帮助。希望有人能提出一些建议

{
  "capabilities":
  [
    {
        "app": "/Users/home/src/mobile-android/app/build/outputs/apk/vanilla/debug/vanilla-local-debug-DEV.apk",
         "appPackage": "com.example.android.apps.connectmobile",
         "disableWindowAnimation": true,
         "noReset": true,
         "noSign": true,
         "appWaitActivity": "com.example.android.apps.connectmobile.myday.AnActivity",
         "deviceName": "wenda",
         "fullReset": false,
         "appWaitDuration": 5000,
         "skipUninstall": true,
         "newCommandTimeout": 180,
         "platformVersion": "9",
         "automationName": "UiAutomator2",
         "platformName": "Android",
         "udid": "520032834252c58d",
         "printPageSourceOnFindFailure": true
    }
  ],
  "configuration":
  {
    "cleanUpCycle":2000,
    "timeout":30000,
    "proxy": "org.openqa.grid.selenium.proxy.DefaultRemoteProxy",
    "maxSession": 1,
    "register": true,
    "registerCycle": 5000,
    "hubPort": 4444,
    "hubHost": "127.0.0.1",
    "hubProtocol": "http"
  }
}