launcher fails to start Sauce Connect

Every time I try to run a test using Karma and this launcher agains SL, I get the following message:

INFO [karma]: Karma v0.12.28 server started at http://localhost:9876/
INFO [launcher]: Starting browser Chrome (Windows 8.1) on SauceLabs
ERROR [launcher.sauce]: Can not start Chrome (Windows 8.1)
    Failed to start Sauce Connect:
    Could not start Sauce Connect. Exit code 1 signal: null

Finished in 0 secs / 0 secs

My karma.conf.js file looks like:

"use strict";


var label,
    files = require("./misc/files");


module.exports = function (config) {

    config.set({

        /**
         * Autowatch
         */

        autoWatch: true,


        /**
         *
         * Browsers
         *
         * Chrome
         * ChromeCanary
         * PhantomJS
         * Firefox
         * Opera
         * Internet Explorer
         * Safari
         *
         */

        browsers: [
            "PhantomJS"
        ],


        /**
         * Browser Config
         */

        browserDisconnectTimeout: 15 * 1000,
        browserDisconnectTolerance: 2,
        browserNoActivityTimeout: 60 * 1000,


        /**
         * Client
         */

        client: {
            mocha: {
                reporter: "html",
                ui: "bdd"
            }
        },


        /**
         * Custom Browsers
         */

        customLaunchers: {
            "SL_Android_4.0": {
                base: "SauceLabs",
                browserName: "Android",
                platform: "Linux",
                version: "4.0"
            },
            "SL_Android_4.1": {
                base: "SauceLabs",
                browserName: "Android",
                platform: "Linux",
                version: "4.1"
            },
            "SL_Android_4.2": {
                base: "SauceLabs",
                browserName: "Android",
                platform: "Linux",
                version: "4.2"
            },
            "SL_Android_4.3": {
                base: "SauceLabs",
                browserName: "Android",
                platform: "Linux",
                version: "4.3"
            },
            "SL_Android_4.4": {
                base: "SauceLabs",
                browserName: "Android",
                platform: "Linux",
                version: "4.4"
            },
            "SL_Android_5.0": {
                base: "SauceLabs",
                browserName: "Android",
                platform: "Linux",
                version: "5.0"
            },
            "SL_Chrome": {
                base: "SauceLabs",
                browserName: "Chrome",
                platform: "Windows 8.1"
            },
            "SL_Chrome_Linux": {
                base: "SauceLabs",
                browserName: "Chrome",
                platform: "Linux"
            },
            "SL_Chrome_OSX": {
                base: "SauceLabs",
                browserName: "Chrome",
                platform: "OS X 10.10"
            },
            "SL_Firefox": {
                base: "SauceLabs",
                browserName: "Firefox",
                platform: "Windows 8.1"
            },
            "SL_Firefox_Linux": {
                base: "SauceLabs",
                browserName: "Firefox",
                platform: "Linux"
            },
            "SL_Firefox_OSX": {
                base: "SauceLabs",
                browserName: "Firefox",
                platform: "OS X 10.10"
            },
            "SL_IE_9": {
                base: "SauceLabs",
                browserName: "Internet Explorer",
                platform: "Windows 7",
                version: "9"
            },
            "SL_IE_10": {
                base: "SauceLabs",
                browserName: "Internet Explorer",
                platform: "Windows 8",
                version: "10"
            },
            "SL_IE_11": {
                base: "SauceLabs",
                browserName: "Internet Explorer",
                platform: "Windows 8.1",
                version: "11"
            },
            "SL_IOS_6": {
                base: "SauceLabs",
                browserName: "iPhone",
                platform: "OS X 10.8",
                version: "6.1"
            },
            "SL_IOS_7": {
                base: "SauceLabs",
                browserName: "iPhone",
                platform: "OS X 10.9",
                version: "7.1"
            },
            "SL_IOS_8": {
                base: "SauceLabs",
                browserName: "iPhone",
                platform: "OS X 10.10",
                version: "8.1"
            },
            "SL_Opera": {
                base: "SauceLabs",
                browserName: "opera",
                platform: "Windows 7"
            },
            "SL_Opera_Linux": {
                base: "SauceLabs",
                browserName: "opera",
                platform: "Linux"
            },
            "SL_Safari_5": {
                base: "SauceLabs",
                browserName: "Safari",
                platform: "OS X 10.6",
                version: "5"
            },
            "SL_Safari_6": {
                base: "SauceLabs",
                browserName: "Safari",
                platform: "OS X 10.8",
                version: "6"
            },
            "SL_Safari_7": {
                base: "SauceLabs",
                browserName: "Safari",
                platform: "OS X 10.9",
                version: "7"
            },
            "SL_Safari_8": {
                base: "SauceLabs",
                browserName: "Safari",
                platform: "OS X 10.10",
                version: "8"
            }
        },


        /**
         * Files
         */

        files: [].concat(
            files.test.unit.dependencies,
            files.src,
            files.test.unit.src
        ),


        /**
         * Frameworks
         */

        frameworks: [
            "mocha",
            "sinon-chai"
        ],


        /**
         *
         * Logging
         *
         * config.LOG_DISABLE
         * config.LOG_ERROR
         * config.LOG_WARN
         * config.LOG_INFO
         * config.LOG_DEBUG
         *
         */

        logLevel: config.LOG_INFO,


        /**
         * Plugins
         */

        plugins: [
            "karma-chrome-launcher",
            "karma-firefox-launcher",
            "karma-ie-launcher",
            "karma-mocha",
            "karma-mocha-reporter",
            "karma-phantomjs-launcher",
            "karma-safari-launcher",
            "karma-sinon-chai",
            "karma-sauce-launcher"
        ],


        /**
         * Port
         */

        port: 9876,


        /**
         * Preprocessors
         */

        preprocessors: {},


        /**
         * Reporters
         */

        reporters: [
            "mocha"
        ],


        /**
         * SauceLabs
         */

        sauceLabs: {
            testName: "Angular VScroller UNIT",
            startConnect: true
        }
    });

    if (process.env.TRAVIS)
    {
        label = "TRAVIS #" + process.env.TRAVIS_BUILD_NUMBER + " (" + process.env.TRAVIS_BUILD_ID + ")";

        config.captureTimeout = 0;
        config.logLevel = config.LOG_DEBUG;
        config.transports = [
            "websocket"
        ];

        config.sauceLabs.build = label;
        config.sauceLabs.startConnect = false;
        config.sauceLabs.recordScreenshots = true;
        config.sauceLabs.tunnelIdentifier = process.env.TRAVIS_JOB_NUMBER;
    }
};

The SAUCE_USERNAME and SAUCE_ACCESS_KEY are available as env variables so the launcher should be able to start SC using those, but it fails every time and I cannot seem to figure out the cause of it.

[SimonWoolf]

@rolandjitsu @sbichenko –

I had the same error. So it says the sc binary exited with an error; unhelpfully it doesn’t tell you what the error was. You can find it out yourself by running sc manually:

• Find out the exact command karma-sauce-launcher is running by setting logLevel to config.LOG_DEBUG in karma.conf.js and trying again. It’ll print something like DEBUG [launcher.sauce]: Starting sc with args: -u XXXXXXXX -k XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXX --tunnel-identifier karma1438354495 --readyfile /tmp/sc-launcher-readyfile
• find where the sc binary is; it’ll be somewhere like node_modules/karma-sauce-launcher/node_modules/sauce-connect-launcher/sc/sc-4.3.8-linux/bin/sc (probably with a slightly different version)
• run that with the args given above, substituting env vars for the X’s. I.e. <path_to_sc> -u $SAUCE_USERNAME -k $SAUCE_ACCESS_KEY --tunnel-identifier test --readyfile /tmp/sc-launcher-readyfile

This’ll then show you the actual reason sc is failing. (For me it was another runaway sc process that was already using the same port).

[wswebcreation]

Closing this due to inactivity, feel free to re-open if this is still an issue.