Unable to create new remote session for Firefox

[Čamo]

Hi, I have a Selenium server 4 with Chrome and Firefox. Chrome works fine but as I try to run Firefox it throws me an error:

org.openqa.selenium.SessionNotCreatedException: Unable to create new remote session. desired capabilities = Capabilities {acceptInsecureCerts: true, browserName: firefox, marionette: true}

The Java code for driver is here:

String browser = System.getProperty("browser");
browser = browser == null || browser.equals("") ? CHROME : browser.toLowerCase();

System.setProperty("webdriver.gecko.driver", "/home/tatrytec/custom-scripts/selenium-server/geckodriver");

Configuration.remote = HUB_URL;
Configuration.browser = browser;

FirefoxOptions options = new FirefoxOptions();
options.setCapability("marionette",true);
options.setHeadless(true);
WebDriver driver = new RemoteWebDriver(options);
WebDriverRunner.setWebDriver(driver);

Thanks for any help..

[Čamo]

I seems something is wrong with server permissions. The Selenium server stack trace says this:

12:34:10.493 INFO [Distributor.newSession] - Session request received by the distributor:

 {

  "desiredCapabilities": {

    "browserName": "firefox",

    "moz:firefoxOptions": {

      "args": [

        "-headless"

      ],

      "prefs": {

      }

    },

    "marionette": true,

    "acceptInsecureCerts": true

  },

  "capabilities": {

    "firstMatch": [

      {

        "acceptInsecureCerts": true,

        "browserName": "firefox",

        "moz:firefoxOptions": {

          "args": [

            "-headless"

          ],

          "prefs": {

          }

        }

      }

    ]

  }

}

1619433250551   geckodriver     INFO    Listening on 127.0.0.1:21294

1619433251262   mozrunner::runner       INFO    Running command: "/snap/bin/firefox" "--marionette" "-headless" "-foreground" "-no-re       mote" "-profile" "/tmp/rust_mozprofile8aLKtJ"

2021/04/26 12:34:13.167735 cmd_run.go:1003: WARNING: cannot start document portal: dial unix /run/user/0/bus: connect: permission den       ied

mkdir: cannot create directory '/run/user/1000': Permission denied

*** You are running in headless mode.

[GFX1-]: glxtest: libpci missing

[GFX1-]: glxtest: libEGL initialize failed

[GFX1-]: glxtest: Unable to open a connection to the X server

[GFX1-]: glxtest: libEGL initialize failed

[GFX1-]: No GPUs detected via PCI

12:35:11.436 WARN [SeleniumSpanExporter$1.lambda$export$0] - {"traceId": "276854ae3527ad1a0d5c4039f0580cec","spanId": "2c522f44eb54f3       0e","spanKind": "INTERNAL","eventTime": 1619433311373994495,"eventName": "exception","attributes": {"driver.url": "http:\u002f\u002fl       ocalhost:21294","exception.message": "Error while creating session with the driver service. Stopping driver service: Could not start        a new session. Response code 500. Message: Connection refused (os error 111)\nBuild info: version: '4.0.0-beta-2', revision: 'Unknown       '\nSystem info: host: 'vmi503579.contaboserver.net', ip: '127.0.1.1', os.name: 'Linux', os.arch: 'amd64', os.version: '5.4.0-70-gener       ic', java.version: '11.0.10'\nDriver info: driver.version: unknown","exception.stacktrace": "org.openqa.selenium.SessionNotCreatedExc       eption: Could not start a new session. Response code 500. Message: Connection refused (os error 111)\nBuild info: version: '4.0.0-bet       a-2', revision: 'Unknown'\nSystem info: host: 'vmi503579.contaboserver.net', ip: '127.0.1.1', os.name: 'Linux', os.arch: 'amd64', os.       version: '5.4.0-70-generic', java.version: '11.0.10'\nDriver info: driver.version: unknown\n\tat org.openqa.selenium.remote.ProtocolH       andshake.createSession(ProtocolHandshake.java:126)\n\tat org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake       .java:84)\n\tat org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:62)\n\tat org.openqa.selenium.grid.       node.config.DriverServiceSessionFactory.apply(DriverServiceSessionFactory.java:116)\n\tat org.openqa.selenium.grid.node.config.Driver       ServiceSessionFactory.apply(DriverServiceSessionFactory.java:60)\n\tat org.openqa.selenium.grid.node.local.SessionSlot.apply(SessionS       lot.java:143)\n\tat org.openqa.selenium.grid.node.local.LocalNode.newSession(LocalNode.java:325)\n\tat org.openqa.selenium.grid.distr       ibutor.local.LocalDistributor.reserve(LocalDistributor.java:353)\n\tat org.openqa.selenium.grid.distributor.Distributor.newSession(Di       stributor.java:227)\n\tat org.openqa.selenium.grid.distributor.local.LocalDistributor$NewSessionRunnable.handleNewSessionRequest(Loca       lDistributor.java:423)\n\tat org.openqa.selenium.grid.distributor.local.LocalDistributor$NewSessionRunnable.run(LocalDistributor.java       :396)\n\tat java.base\u002fjava.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)\n\tat java.base\u002fjava.util.con       current.FutureTask.runAndReset(FutureTask.java:305)\n\tat java.base\u002fjava.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFu       tureTask.run(ScheduledThreadPoolExecutor.java:305)\n\tat java.base\u002fjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolE       xecutor.java:1128)\n\tat java.base\u002fjava.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)\n\tat java.ba       se\u002fjava.lang.Thread.run(Thread.java:834)\n","exception.type": "org.openqa.selenium.SessionNotCreatedException","logger": "org.op       enqa.selenium.grid.node.config.DriverServiceSessionFactory","session.capabilities": "{\"acceptInsecureCerts\": true,\"browserName\":        \"firefox\",\"marionette\": true,\"moz:firefoxOptions\": {\"args\": [  \"-headless\"  ],  \"prefs\": {  }  }  }\n"}}

Dátum: pondelok 26. apríla 2021, čas: 11:50:32 UTC+2, odosielateľ: Čamo