Nigthwatch hangs at ENOTFOUND when launched with 2 browsers

Describe the bug

If NW is started with 2 browsers (--env chrome,firefox) it hangs when custom command fetches URL for JSON file if net::ERR_NAME_NOT_RESOLVED encounters.

If NW is started with one browser only (e.g. --env chrome) the NW goes back to command prompt at fail but doesn't close browser > after hook with browser.end() doesn't help.

If server where JSON is typically served is working all is fine.

Test folder contains ~8 tests, each test file calls this command for getting JSON, if we remove this command call from all test files except one, then no hangup happens even if 2 browser are used simultaneously.

Sample test

sampleTest.js

```js // custom command var util = require('util'); var events = require('events'); var fetch = require('node-fetch'); function getJSON() { } util.inherits(getJSON, events.EventEmitter); getJSON.prototype.command = function (apiUrl, success) { this.client.api.execute( function () { return window.sessionStorage.getItem('access_token'); }, [], item => { let headers = { 'Content-Type': 'application/json' }; if (item.value !== null) { headers['Authorization'] = `Bearer ${item.value}`; } fetch(apiUrl, { method: 'GET', headers }) .then(res => res.text()) .then(res => JSON.parse(res.trim())) .then(response => { success(response); this.emit('complete'); }) .catch(err => { this.emit('complete'); throw err; }); } ); }; module.exports = getJSON; // part of test var login = require('./login.js') let collapseSection module.exports = { 'LogIn': login.LogIn, 'Get BackEnd JSON data': login['Get BackEnd JSON data'], // <---- **hangs here** 'Check if Collapse button is displayed with correct screen size': function (browser) { headerPageObject = browser.page.headerPage() collapseSection = headerPageObject.section.COLLAPSE_BUTTON browser .setWindowSize(1920, 1080) .verify.not.visible(collapseSection.selector) .setWindowSize(575, 1080) .verify.visible(collapseSection.selector) }, 'Check if Collapse button opens menu with correct Items': function (browser) { let topBarCollapseSelector = collapseSection.elements.TOP_BAR_COLLAPSE browser.click(collapseSection.selector) browser.verify.visible(topBarCollapseSelector) for (element in headerPageObject.section) { if (headerPageObject.section[element].props.presentOnPage) { if (headerPageObject.section[element].props.presentOnCollapse) { browser.verify.visible(headerPageObject.section[element].selector) } } } } ```

Run with command

npm run nightwatch -- tests/nightwatch/tests/ --env firefox,chrome --url https://<my_url>

Verbose output

debug.log

``` Starting GeckoDriver on port 4444... Starting ChromeDriver on port 9515... GeckoDriver up and running on port 4444 with pid: 32092 (134ms). ChromeDriver up and running on port 9515 with pid: 20056 (126ms). Started child process for: firefox environment Started child process for: chrome environment ... ... ... → Running command: end ([Function]) chrome Failures in "Get BackEnd JSON data". Taking screenshot... chrome → Running [afterEach]: chrome → Completed [afterEach]. chrome × chrome [Collapse Button Test] Get BackEnd JSON data (1.107s) chrome FetchError: request to https:// failed, reason: getaddrinfo ENOTFOUND :443 chrome at TLSSocket.socketErrorListener (_http_client.js:392:9) chrome at emitErrorNT (internal/streams/destroy.js:91:8) chrome at emitErrorAndCloseNT (internal/streams/destroy.js:59:3) chrome at process._tickCallback (internal/process/next_tick.js:63:19) chrome → Running [after]: ... ... ... TEST FAILURE: 2 errors during execution; 0 assertions failed, 14 passed (20.835s) × collapseButtonTest – Get BackEnd JSON data (1.107s) FetchError: request to https:// failed, reason: getaddrinfo ENOTFOUND :443 at TLSSocket.socketErrorListener (_http_client.js:392:9) at emitErrorNT (internal/streams/destroy.js:91:8) at emitErrorAndCloseNT (internal/streams/destroy.js:59:3) at process._tickCallback (internal/process/next_tick.js:63:19) SKIPPED: - Check if Collapse button is displayed with correct screen size - Check if Collapse button opens menu with correct Items - Check if Collapse button is dissmissed after screen goes back to fullscreen ```

Configuration

nightwatch.json

```js { // Autogenerated by Nightwatch // Refer to the online docs for more details: https://nightwatchjs.org/gettingstarted/configuration/ const Services = {}; loadServices(); module.exports = { // An array of folders (excluding subfolders) where your tests are located; // if this is not specified, the test source must be passed as the second argument to the test runner. //src_folders: ['./tests'], // See https://nightwatchjs.org/guide/working-with-page-objects/ page_objects_path: './tests/nightwatch/pages', // See https://nightwatchjs.org/guide/extending-nightwatch/#writing-custom-commands custom_commands_path: './node_modules/@qc/nightwatch/commands', // See https://nightwatchjs.org/guide/extending-nightwatch/#writing-custom-assertions custom_assertions_path: '', // See https://nightwatchjs.org/guide/#external-globals globals_path: './globals/globalsModule.js', webdriver: { start_process: true }, test_settings: { firefox: { screenshots: { enabled: true, path: 'screens', on_failure: true }, desiredCapabilities: { browserName: 'firefox', alwaysMatch: { // Enable this if you encounter unexpected SSL certificate errors in Firefox // acceptInsecureCerts: true, 'moz:firefoxOptions': { args: [ //'-headless', // '-verbose' ] } } }, webdriver: { port: 4444, server_path: Services.geckodriver ? Services.geckodriver.path : '', cli_args: [ // very verbose geckodriver logs // '-vv' ] } }, firefox_cli: { screenshots: { enabled: true, path: 'screens', on_failure: true }, desiredCapabilities: { browserName: 'firefox', alwaysMatch: { // Enable this if you encounter unexpected SSL certificate errors in Firefox // acceptInsecureCerts: true, 'moz:firefoxOptions': { args: [ '-headless', // '-verbose' ] } } }, webdriver: { port: 4444, server_path: Services.geckodriver ? Services.geckodriver.path : '', cli_args: [ // very verbose geckodriver logs // '-vv' ] } }, chrome: { screenshots: { enabled: true, path: 'screens', on_failure: true }, desiredCapabilities: { browserName: 'chrome', chromeOptions: { // This tells Chromedriver to run using the legacy JSONWire protocol (not required in Chrome 78) // w3c: false, // More info on Chromedriver: https://sites.google.com/a/chromium.org/chromedriver/ args: [ //'--no-sandbox', //'--ignore-certificate-errors', //'--allow-insecure-localhost', //'--headless' ] } }, webdriver: { port: 9515, server_path: Services.chromedriver ? Services.chromedriver.path : '', cli_args: [ // --verbose ] } }, chrome_cli: { screenshots: { enabled: true, path: 'screens', on_failure: true }, desiredCapabilities: { browserName: 'chrome', chromeOptions: { // This tells Chromedriver to run using the legacy JSONWire protocol (not required in Chrome 78) // w3c: false, // More info on Chromedriver: https://sites.google.com/a/chromium.org/chromedriver/ args: [ //'--no-sandbox', //'--ignore-certificate-errors', //'--allow-insecure-localhost', '--headless' ] } }, webdriver: { port: 9515, server_path: Services.chromedriver ? Services.chromedriver.path : '', cli_args: [ // --verbose ] } }, ////////////////////////////////////////////////////////////////////////////////// // Configuration for when using the browserstack.com cloud service | // | // Please set the username and access key by setting the environment variables: | // - BROWSERSTACK_USER | // - BROWSERSTACK_KEY | // .env files are supported | ////////////////////////////////////////////////////////////////////////////////// browserstack: { selenium: { host: 'hub-cloud.browserstack.com', port: 443 }, // More info on configuring capabilities can be found on: // https://www.browserstack.com/automate/capabilities?tag=selenium-4 desiredCapabilities: { 'bstack:options': { local: 'false', userName: '${BROWSERSTACK_USER}', accessKey: '${BROWSERSTACK_KEY}' } }, disable_error_log: true, webdriver: { keep_alive: true, start_process: false } }, 'browserstack.chrome': { extends: 'browserstack', desiredCapabilities: { browserName: 'chrome', chromeOptions: { // This tells Chromedriver to run using the legacy JSONWire protocol // More info on Chromedriver: https://sites.google.com/a/chromium.org/chromedriver/ w3c: false } } }, 'browserstack.firefox': { extends: 'browserstack', desiredCapabilities: { browserName: 'firefox' } }, 'browserstack.ie': { extends: 'browserstack', desiredCapabilities: { browserName: 'IE', browserVersion: '11.0', 'bstack:options': { os: 'Windows', osVersion: '10', local: 'false', seleniumVersion: '3.5.2', resolution: '1366x768' } } }, ////////////////////////////////////////////////////////////////////////////////// // Configuration for when using the Selenium service, either locally or remote, | // like Selenium Grid | ////////////////////////////////////////////////////////////////////////////////// selenium: { // Selenium Server is running locally and is managed by Nightwatch selenium: { start_process: true, port: 4444, server_path: Services.seleniumServer ? Services.seleniumServer.path : '', cli_args: { 'webdriver.gecko.driver': Services.geckodriver ? Services.geckodriver.path : '', 'webdriver.chrome.driver': Services.chromedriver ? Services.chromedriver.path : '' } } }, 'selenium.chrome': { extends: 'selenium', desiredCapabilities: { browserName: 'chrome', chromeOptions: { w3c: false } } }, 'selenium.firefox': { extends: 'selenium', desiredCapabilities: { browserName: 'firefox', 'moz:firefoxOptions': { args: [ // '-headless', // '-verbose' ] } } } } }; function loadServices() { try { Services.seleniumServer = require('selenium-server'); } catch (err) { } try { Services.chromedriver = require('chromedriver'); } catch (err) { } try { Services.geckodriver = require('geckodriver'); } catch (err) { } } } ```

Your Environment

Executable	Version
`nightwatch --version`	1.3.2
`npm --version`	6.3.14
`node --version`	10.18.0

Browser driver	Version
NAME	VERSION
chromedriver	78
geckodriver	v0.26.0

System:

Windows 10 (1909)

nightwatchjs / nightwatch