Random ECONREFUSED from webdriver / chrome - google-chrome

Question

We have written a bunch of e2e tests for an angular4 app, that we are developing. The problem is that I am getting random ECONNREFUSED message from webdriver / chrome, when running automated tests with protractor.
- Failed: ECONNREFUSED connect ECONNREFUSED 127.0.0.1:54657
Protractor is running with shardedtestfiles turned on, and running with 12 browsers in parallel, in order to speed up testing.
I can't pinpoint an exact pattern to the errors that we get, so I am a bit lost here.. Below is a copy of the protractor config file, that we are using.
// Protractor configuration file, see link for more information
// https://github.com/angular/protractor/blob/master/lib/config.ts
//*global jasmine */
"use strict";
var SpecReporter = require("jasmine-spec-reporter").SpecReporter;
var timeoutSettings = require('./dist/out-tsc/e2e/protractor.config').timeoutSettings
exports.config = {
allScriptsTimeout: 99999,
suites: {
spec: [
"./dist/out-tsc/e2e/spec/**/*spec.js"
]
},
capabilities: {
browserName: "chrome",
maxInstances: 12,
chromeOptions: {
args: ["--no-sandbox", "--disable-infobars", "--start-maximized", "--lang=DA-dk"],
prefs: {
download: {
promt_for_download: false,
default_directory: "spec/downloads" // To Do: Make sure this dir is correct!
},
"profile.password_manager_enabled": false,
credentials_enable_service: false,
password_manager_enabled: false
}
}
},
directConnect: true,
framework: "jasmine",
jasmineNodeOpts: {
showColors: true,
defaultTimeoutInterval: 120000,
print: function () {}
},
SELENIUM_PROMISE_MANAGER: false,
useAllAngular2AppRoots: true,
beforeLaunch: function () {
require("ts-node").register({
project: "./e2e/tsconfig.json"
});
},
onPrepare: function () {
browser.manage().timeouts().implicitlyWait(timeoutSettings.implicitWaitNormal);
jasmine.getEnv().addReporter(new SpecReporter({ spec: { displayStacktrace: true } }));
var trx = require("jasmine-trx-reporter");
return browser.getCapabilities().then(function (caps) {
var browserName = caps.get("browserName").toUpperCase();
var jasmineTrxConfig = {
reportName: "Protractor Test Results",
folder: "reports",
outputFile: "",
browser: "GANDALF_" + browserName,
groupSuitesIntoSingleFile: false,
takeScreenshotsOnlyOnFailures: false
};
jasmine.getEnv().addReporter(new trx(jasmineTrxConfig));
});
}
};

Answer 1

It seems that this is actually a problem in the version of selenium webdriver, that is pulled in, when using protractor
There is a discussion in an issue with protractor on github
https://github.com/angular/protractor/issues/4792