A exception with a null response was thrown sending an HTTP request to the remote WebDriver server

[Svrkota-S]

Description

Hi everyone, I'm trying to test Android app, but I currently have a problem I cannot resolve. This is the error I'm getting:

OpenQA.Selenium.WebDriverException: 'A exception with a null response was thrown sending an HTTP request to the remote WebDriver server for URL http://127.0.0.1:4723/wd/hub/session/590325fa-f414-47fe-bb52-be04e585cb97/elements. The status of the exception was SendFailure, and the message was: The underlying connection was closed: An unexpected error occurred on a send.'

Environment

Appium version: 1.8 Appium.WebDriver version: v3.0.0.2 Selenium.WebDriver version: 3.11 Selenium.Support version: 3.11 Emulator: Oreo 8.0 - API 26

Details

What's interesting is that sometimes one or both test succeed, but it happens rarely.

Code To Reproduce Issue [ Good To Have ]

using System;
    using Microsoft.VisualStudio.TestTools.UnitTesting;
    using OpenQA.Selenium.Appium.Service;
    using OpenQA.Selenium.Appium.Android;
    using OpenQA.Selenium.Appium.Service.Options;
    using System.IO;
    using OpenQA.Selenium.Remote;
    using OpenQA.Selenium.Appium.Enums;
    using OpenQA.Selenium.Support.UI;
    using OpenQA.Selenium.Appium;
    using System.Collections.ObjectModel;
    using OpenQA.Selenium;
    using System.Linq;

    namespace UnitTestProject1
    {
        [TestClass]
        public class UnitTest1
        {
            private static AndroidDriver<AndroidElement> _driver;

            [ClassInitialize]
            public static void ClassInitialize(TestContext context)
            {
                var args = new OptionCollector().AddArguments(GeneralOptionList.PreLaunch());;
                var desiredCaps = new DesiredCapabilities();
                desiredCaps.SetCapability(MobileCapabilityType.DeviceName, "MyDevice");
                desiredCaps.SetCapability(MobileCapabilityType.PlatformName, "Android");
                desiredCaps.SetCapability(MobileCapabilityType.PlatformVersion, "8.0");
                desiredCaps.SetCapability(MobileCapabilityType.App, @"C:\Users\User\Documents\Visual Studio 2017\Projects\UnitTestProject1\UnitTestProject1\bin\Debug\Resources\WikipediaSample.apk");
                _driver = new AndroidDriver<AndroidElement>(new Uri("http://127.0.0.1:4723/wd/hub"), desiredCaps);
            }

            [TestInitialize]
            public void TestInitialize()
            {
                if (_driver != null)
                {
                    _driver.ResetApp();
                }
            }

            [ClassCleanup]
            public static void ClassCleanup()
            {
                _driver.CloseApp();
            }

            [TestMethod]
            public void Test1()
            {
                AndroidElement searchElement = (AndroidElement)new WebDriverWait(_driver, TimeSpan.FromSeconds(30)).Until(
                    ExpectedConditions.ElementToBeClickable(MobileBy.AccessibilityId("Search Wikipedia"))
                );
                searchElement.Click();
                AndroidElement insertTextElement = (AndroidElement)new WebDriverWait(_driver, TimeSpan.FromSeconds(30)).Until(
                    ExpectedConditions.ElementToBeClickable(MobileBy.Id("org.wikipedia.alpha:id/search_src_text"))
                );
                insertTextElement.SendKeys("Serbia");
                System.Threading.Thread.Sleep(5000);

                ReadOnlyCollection<AndroidElement> results = _driver.FindElements(By.ClassName("android.widget.TextView"));
                Assert.IsTrue(results.ElementAt(1).Text.Equals("Serbia"));
            }

            [TestMethod]
            public void Test2()
            {
                AndroidElement searchElement = (AndroidElement)new WebDriverWait(_driver, TimeSpan.FromSeconds(30)).Until(
                    ExpectedConditions.ElementToBeClickable(MobileBy.AccessibilityId("Search Wikipedia"))
                );
                searchElement.Click();
                AndroidElement insertTextElement = (AndroidElement)new WebDriverWait(_driver, TimeSpan.FromSeconds(30)).Until(
                    ExpectedConditions.ElementToBeClickable(MobileBy.Id("org.wikipedia.alpha:id/search_src_text"))
                );
                insertTextElement.SendKeys("USA");
                System.Threading.Thread.Sleep(5000);

                ReadOnlyCollection<AndroidElement> results = _driver.FindElements(By.ClassName("android.widget.TextView"));
                Assert.IsTrue(results.ElementAt(1).Text.Equals("United States"));
            }
        }
    }

[laolubenson]

This is a bug, which I have a fix for. I need to run tests and make PR.

[OrestFi]

This is a bug, which I have a fix for. I need to run tests and make PR.

Hi, is there any progress on this fix?

[ArmyMedalMei]

This is a bug, which I have a fix for. I need to run tests and make PR.

Hi, is there any progress on this fix?

[ElDuderino250]

Adding in my own "any movement on this?" It would be very, very nice to not have to make allowance for this random failure anymore!

[srcd4]

Any update on this? I'm also encountering this issue. Thanks!

[laolubenson]

I could no longer reproduce this. Please try v4+ available via nuget, and comment If issue still exists

[coolvasanth]

I'm using Appium Driver 4.1.1 but still the issue persists.

[coolvasanth]

I have updated to latest version - 4.1.1 and the issue still persists. Kindly help me.

[laolubenson]

@coolvasanth Can you post gists of your, reproduction code, stack trace and appium logs?

[coolvasanth]

Hi I have added Appium log in this Gist. I have added log only when I'm getting above error.

Environment Information:

Platform: Android Appium Version: 1.15.1 (Desktop software) App development platform: Ionic (Version 4) Testing Framework: BDD (Behavioral driven development) Chrome Driver: 2.33

Scenario: Above error is not common. Sometimes it works fine, but most of the time it fails. If I'm running many cases at a time then randomly one or two will pass. And most will fail.

[laolubenson]

@coolvasanth Sorry, I didn't get a notification for your reply. Your log highlights that there were no web views available.See line 4-6. I can't tell what operation you were trying to perform at that point or before

[Dor-bl]

@Svrkota-S Can you please try with appium web driver v5 beta? If this issue still repro, I'll take a look

[Dor-bl]

Closed since no response.