[🐛 Bug]: Custom capability is not working properly with IE in selenium 4

[mpstellar]

What happened?

I have a hub with two kind of different Grid nodes. I am trying to set a custom-cap in IE (Edge with Internet Explorer Mode), however, when I set (“custom-cap”, false), the tests are executed on any node indistinctly.
I have trying to set different kind of prefix as well, but nothing works: (“c:custom-cap”, false), (“ie:custom-cap”, false), (“se:custom-cap”, false).

How can we reproduce the issue?

The custom capability is applied on the http://hubipadress:4444/status page:
{
  "value": {
    "ready": true,
    "message": "Selenium Grid ready.",
    "nodes": [
      {
        "id": "8c748cc5-a767-4392-b0d7-4abffc16aec1",
        "uri": "http:\u002f\u002f.....:5555",
        "maxSessions": 2,
        "osInfo": {
          "arch": "amd64",
          "name": "Windows Server 2016",
          "version": "10.0"
        },
        "heartbeatPeriod": 60000,
        "availability": "UP",
        "version": "4.7.2 (revision 4d4020c3b7)",
        "slots": [
          {
            "id": {
              "hostId": "8c748cc5-a767-4392-b0d7-4abffc16aec1",
              "id": "37ef5819-e892-471e-9597-bb5020b5cbab"
            },
            "lastStarted": "1970-01-01T00:00:00Z",
            "session": null,
            "stereotype": {
              "browserName": "chrome",
              "custom-cap": false,
              "platformName": "Windows 10",
              "se:webDriverExecutable": "D:\\Selenium\\Drivers\\chromedriver.exe"
            }
          },
          {
            "id": {
              "hostId": "8c748cc5-a767-4392-b0d7-4abffc16aec1",
              "id": "e549d761-5f80-4acb-8abb-dc6a11452f8b"
            },
            "lastStarted": "1970-01-01T00:00:00Z",
            "session": null,
            "stereotype": {
              "browserName": "firefox",
              "custom-cap": false,
              "platformName": "Windows 10",
              "se:webDriverExecutable": "D:\\Selenium\\Drivers\\geckodriver.exe"
            }
          },
          {
            "id": {
              "hostId": "8c748cc5-a767-4392-b0d7-4abffc16aec1",
              "id": "f0351165-16bf-4ca1-8a01-3e78b455e82d"
            },
            "lastStarted": "1970-01-01T00:00:00Z",
            "session": null,
            "stereotype": {
              "browserName": "internet explorer",
              "custom-cap": false,
              "platformName": "Windows 10",
              "se:ieOptions": {
                "ie.edgechromium": "true",
                "ie.edgepath": "C:\u002fProgram Files (x86)\u002fMicrosoft\u002fEdge\u002fApplication\u002fmsedge.exe"
              },
              "se:webDriverExecutable": "D:\\Selenium\\Drivers\\IEDriverServer.exe"
            }
          },
          {
            "id": {
              "hostId": "8c748cc5-a767-4392-b0d7-4abffc16aec1",
              "id": "285ba454-0da4-4192-a5c4-1e99f3049bcb"
            },
            "lastStarted": "1970-01-01T00:00:00Z",
            "session": null,
            "stereotype": {
              "browserName": "MicrosoftEdge",
              "custom-cap": false,
              "platformName": "Windows 10",
              "se:webDriverExecutable": "D:\\Selenium\\Drivers\\msedgedriver.exe"
            }
          },
          {
            "id": {
              "hostId": "8c748cc5-a767-4392-b0d7-4abffc16aec1",
              "id": "9c79b70c-f375-4862-b06e-8c00de974b7b"
            },
            "lastStarted": "1970-01-01T00:00:00Z",
            "session": null,
            "stereotype": {
              "browserName": "firefox",
              "custom-cap": false,
              "platformName": "Windows 10",
              "se:webDriverExecutable": "D:\\Selenium\\Drivers\\geckodriver.exe"
            }
          },
          {
            "id": {
              "hostId": "8c748cc5-a767-4392-b0d7-4abffc16aec1",
              "id": "bf6c3818-6042-482a-9d5b-0ecf34c29e1b"
            },
            "lastStarted": "1970-01-01T00:00:00Z",
            "session": null,
            "stereotype": {
              "browserName": "chrome",
              "custom-cap": false,
              "platformName": "Windows 10",
              "se:webDriverExecutable": "D:\\Selenium\\Drivers\\chromedriver.exe"
            }
          },
          {
            "id": {
              "hostId": "8c748cc5-a767-4392-b0d7-4abffc16aec1",
              "id": "8a3fba1d-0747-45fb-8ad3-32c458ed35a1"
            },
            "lastStarted": "1970-01-01T00:00:00Z",
            "session": null,
            "stereotype": {
              "browserName": "MicrosoftEdge",
              "custom-cap": false,
              "platformName": "Windows 10",
              "se:webDriverExecutable": "D:\\Selenium\\Drivers\\msedgedriver.exe"
            }
          }
        ]
      },
      {
        "id": "5ce2a7c7-1a56-44d9-8391-e9ba9a2ff3fe",
        "uri": "http:\u002f\u002f10.151.18.98:5555",
        "maxSessions": 2,
        "osInfo": {
          "arch": "amd64",
          "name": "Linux",
          "version": "3.10.0-1160.71.1.el7.x86_64"
        },
        "heartbeatPeriod": 60000,
        "availability": "UP",
        "version": "4.7.2 (revision 4d4020c3b7)",
        "slots": [
          {
            "id": {
              "hostId": "5ce2a7c7-1a56-44d9-8391-e9ba9a2ff3fe",
              "id": "16846465-ec7e-4a66-96d2-7946e4f194cf"
            },
            "lastStarted": "1970-01-01T00:00:00Z",
            "session": null,
            "stereotype": {
              "browserName": "firefox",
              "custom-cap": false,
              "platformName": "LINUX",
              "se:webDriverExecutable": "\u002fapp\u002fselenium-connector\u002fgeckoDriver"
            }
          },
          {
            "id": {
              "hostId": "5ce2a7c7-1a56-44d9-8391-e9ba9a2ff3fe",
              "id": "27100db9-b8a0-4b26-9f85-7922835c8c56"
            },
            "lastStarted": "1970-01-01T00:00:00Z",
            "session": null,
            "stereotype": {
              "browserName": "firefox",
              "custom-cap": false,
              "platformName": "LINUX",
              "se:webDriverExecutable": "\u002fapp\u002fselenium-connector\u002fgeckoDriver"
            }
          },
          {
            "id": {
              "hostId": "5ce2a7c7-1a56-44d9-8391-e9ba9a2ff3fe",
              "id": "06e3caea-c951-4155-8dde-6f3e379abf67"
            },
            "lastStarted": "2023-02-07T08:51:00.449534Z",
            "session": null,
            "stereotype": {
              "browserName": "chrome",
              "custom-cap": false,
              "platformName": "LINUX",
              "se:webDriverExecutable": "\u002fapp\u002fselenium-connector\u002fchromeDriver"
            }
          },
          {
            "id": {
              "hostId": "5ce2a7c7-1a56-44d9-8391-e9ba9a2ff3fe",
              "id": "0626fe53-7d75-4631-86f5-1ddbdcebcc1b"
            },
            "lastStarted": "2023-02-07T08:53:13.896321Z",
            "session": null,
            "stereotype": {
              "browserName": "chrome",
              "custom-cap": false,
              "platformName": "LINUX",
              "se:webDriverExecutable": "\u002fapp\u002fselenium-connector\u002fchromeDriver"
            }
          }
        ]
      },
      {
        "id": "cf0e8b1b-7b0c-4b51-a10d-c45ed9af2cbd",
        "uri": "http:\u002f\u002f.....:5555",
        "maxSessions": 1,
        "osInfo": {
          "arch": "amd64",
          "name": "Windows Server 2016",
          "version": "10.0"
        },
        "heartbeatPeriod": 60000,
        "availability": "UP",
        "version": "4.7.2 (revision 4d4020c3b7)",
        "slots": [
          {
            "id": {
              "hostId": "cf0e8b1b-7b0c-4b51-a10d-c45ed9af2cbd",
              "id": "0ebb53a1-01b9-4486-8892-2b76903a7a3f"
            },
            "lastStarted": "1970-01-01T00:00:00Z",
            "session": null,
            "stereotype": {
              "browserName": "internet explorer",
              "custom-cap": true,
              "platformName": "Windows 10",
              "se:ieOptions": {
                "ie.edgechromium": "true",
                "ie.edgepath": "C:\u002fProgram Files (x86)\u002fMicrosoft\u002fEdge\u002fApplication\u002fmsedge.exe"
              },
              "se:webDriverExecutable": "D:\\Selenium\\Drivers\\IEDriverServer.exe"
            }
          }
        ]
      }
    ]
  }
}

I am just interested in IE browser. Bellow you can find part of th code which it´s running:
public InternetExplorerCaixa(boolean cap){
	options = new InternetExplorerOptions();
	options.attachToEdgeChrome();
	options.withEdgeExecutablePath("C:\\Program Files (x86)\\Microsoft\\Edge\\Application\\msedge.exe");
	if (cap) {
		options.setCapability(custom-cap, true);
	} else {
		options.setCapability(custom-cap, false);
	}
}

Relevant log output

The expected behavior is that tests without custom-cap run just on the node where custom-cap is false, unfortunately they run on all of them.

Operating System

Windows 10

Selenium version

Selenium Server 4.7.2

What are the browser(s) and version(s) where you see this issue?

Internet Explore 11

What are the browser driver(s) and version(s) where you see this issue?

IEDriverServer.exe 4.7.0.0 (32-bit)

Are you using Selenium Grid?

4.7.2

[github-actions]

@mpstellar, thank you for creating this issue. We will troubleshoot it as soon as we can.

---

Info for maintainers

Triage this issue by using labels.

If information is missing, add a helpful comment and then I-issue-template label.

If the issue is a question, add the I-question label.

If the issue is valid but there is no time to troubleshoot it, consider adding the help wanted label.

If the issue requires changes or fixes from an external project (e.g., ChromeDriver, GeckoDriver, MSEdgeDriver, W3C), add the applicable G-* label, and it will provide the correct link and auto-close the issue.

After troubleshooting the issue, please add the R-awaiting answer label.

Thank you!

[diemol]

"custom-cap": false, in the stereotype needs to be prefixed, but please avoid se:.

It could be "prefix:custom-cap": false,.

[mpstellar]

I was trying with "c:cutom-cap": false and "ie:custom-cap": fase, but nothing works

[diemol]

How does the Grid look like when you set the custom cap with a prefix?

[mpstellar]

The Grid recognizes the custom-cap. Log output:
13:21:31 org.openqa.selenium.SessionNotCreatedException: Could not start a new session. Response code 500. Message: Could not start a new session. Could not start a new session. Error while creating session with the driver service. Stopping driver service: Could not start a new session. Response code 500. Message: No matching capability sets found.
13:21:31 Unable to match capability set 0: ie:custom-cap is an unknown extension capability for IE

---

12:33:17 org.openqa.selenium.SessionNotCreatedException: Could not start a new session. Response code 500. Message: Could not start a new session. Could not start a new session. Error while creating session with the driver service. Stopping driver service: Could not start a new session. Response code 500. Message: No matching capability sets found.
12:33:17 Unable to match capability set 0: c:custom-cap is an unknown extension capability for IE

[diemol]

What I meant is how http://hubipadress:4444/status looks when you set the custom cap in the stereotype.

[mpstellar]

{
            "id": {
              "hostId": "8c748cc5-a767-4392-b0d7-4abffc16aec1",
              "id": "f0351165-16bf-4ca1-8a01-3e78b455e82d"
            },
            "lastStarted": "1970-01-01T00:00:00Z",
            "session": null,
            "stereotype": {
              "browserName": "internet explorer",
              "c:custom-cap": false,
              "platformName": "Windows 10",
              "se:ieOptions": {
                "ie.edgechromium": "true",
                "ie.edgepath": "C:\u002fProgram Files (x86)\u002fMicrosoft\u002fEdge\u002fApplication\u002fmsedge.exe"
              },
              "se:webDriverExecutable": "D:\\Selenium\\Drivers\\IEDriverServer.exe"
            }
          }, {
            "id": {
              "hostId": "8c748cc5-a767-4392-b0d7-4abffc16aec1",
              "id": "f0351165-16bf-4ca1-8a01-3e78b455e82d"
            },
            "lastStarted": "1970-01-01T00:00:00Z",
            "session": null,
            "stereotype": {
              "browserName": "internet explorer",
              "c:custom-cap": false,
              "platformName": "Windows 10",
              "se:ieOptions": {
                "ie.edgechromium": "true",
                "ie.edgepath": "C:\u002fProgram Files (x86)\u002fMicrosoft\u002fEdge\u002fApplication\u002fmsedge.exe"
              },
              "se:webDriverExecutable": "D:\\Selenium\\Drivers\\IEDriverServer.exe"
            }
          },

[diemol]

Does it work when you do not use the custom caps in the stereotype?

[mpstellar]

Yes, it does. Tests run properly in IE without any custom cap in the stereotype

[diemol]

OK, then please provide the steps you follow to start the Grid, with commands please.

And then the code you are using on the client side to create the session. Ideally we can reopen with that information.