WebDriverException: Error forwarding the new session cannot find : {platform=WINDOWS, browserName=FIREFOX, version=3.6}

Question

I am new to Selenium Web driver as well as Grid 2.

I am trying to run a test case but it gives me an exception

Exception in thread \"main\" o

Answer 1

It is probably just what it says: the hub/selenium can not find a match for the requested capabilities.

I had this issue, and the error a got was (after formatting):

java.lang.RuntimeException : org.openqa.selenium.WebDriverException : Error forwarding the new session cannot find : Capabilities[{
        proxy = {
            proxyAutoconfigUrl = null,
            socksUsername = null,
            socksPassword = null,
            autodetect = false,
            httpProxy = xxxxxxxxxxxx.com : 8080,
            proxyType = MANUAL,
            noProxy = xxxxxxxxxxxxx.net,
            ftpProxy = null,
            hCode = 1273131486,
            socksProxy = null,
            class = org.openqa.selenium.Proxy,
            sslProxy = xxxxxxxxxxxxxx.com : 8080
        },
        loggingPrefs = org.openqa.selenium.logging.LoggingPreferences @ 3564e4e9,
        browserName = MicrosoftEdge,
        type = regular,
        version = ,
        platform = ANY
    }
]

Turns out that my co-workers had added a new parameter to the capabilities ("type"), and I had not updated my .json file that configures my Selenium node.