"Error: socket hang up" in iOS tests

The problem

Hi all! I try to update appium from 1.9.1 to 1.14.0. We have 35 tests. After update, my tests sometimes failed (6-10 random tests from 35). Everytime I get error:

1. From Visual Studio An unknown server-side error occurred while processing the command. Original error: Could not proxy. Proxy error: Could not proxy command to remote server. Original error: Error: socket hang up
2. I found it in appium logs [XCUITest] xcodebuild exited with code 'null' and signal 'SIGKILL' [WD Proxy] Got an unexpected response: {"code":"ECONNRESET"} [W3C (98e37bd1)] Encountered internal error running command: Error: Could not proxy. Proxy error: Could not proxy command to remote server. Original error: Error: socket hang up
3. And this one from simulator logs everytime Aug 1 12:19:13 macmini-3 com.apple.CoreSimulator.SimDevice.999E28FA-88CE-4E3D-9D05-499EFDE3A5DD[30232] (UIKitApplication:com.apple.test.WebDriverAgentRunner-Runner[0x48b5][30254][30748]): Service exited with abnormal code: 74

It’s may happens in random place in test. When the test starts it deletes old simulator and creates new one on mac-mini with last macOS Mojave. At the same time, I have two running tests. Each appium I run with other ports:

1. appium -p 4723 --webdriveragent-port 8100
2. appium -p 4730 --webdriveragent-port 8105

Environment

• Appium version (or git revision) that exhibits the issue: 1.14.0
• Last Appium version that did not exhibit the issue (if applicable): 1.9.1
• Desktop OS/version used to run Appium: macOS Mojave 10.14.6
• Node.js version (unless using Appium.app|exe): 10.16.0
• Npm or Yarn package manager: npm 6.10.1
• Mobile platform/version under test: iOS 12.4
• Real device or emulator/simulator: simulator
• Appium CLI or Appium.app|exe: Appium CLI
• Xcode: 10.3
• Xcode-select version 2354

Details

My Capabilities:

            appiumOptions.AddAdditionalCapability(MobileCapabilityType.PlatformVersion, "12.4");
            appiumOptions.AddAdditionalCapability(MobileCapabilityType.App, _deviceSettings.BuildUrl);
            appiumOptions.AddAdditionalCapability(MobileCapabilityType.NewCommandTimeout, 900);
            appiumOptions.AddAdditionalCapability("wdaLaunchTimeout", 360000);
            appiumOptions.AddAdditionalCapability("wdaConnectionTimeout", 360000);
            appiumOptions.AddAdditionalCapability("reduceMotion", true);
            appiumOptions.AddAdditionalCapability("skipLogCapture", true);
            appiumOptions.AddAdditionalCapability("iosInstallPause", 8000);`
            appiumOptions.AddAdditionalCapability(MobileCapabilityType.DeviceName, _deviceSettings.Hostname);
            appiumOptions.AddAdditionalCapability("wdaLocalPort", _deviceSettings.Port);

I’ve tried to remove/change

            appiumOptions.AddAdditionalCapability("wdaLaunchTimeout", 360000);
            appiumOptions.AddAdditionalCapability("wdaConnectionTimeout", 360000);
            appiumOptions.AddAdditionalCapability("iosInstallPause", 8000);
            appiumOptions.AddAdditionalCapability(MobileCapabilityType.NewCommandTimeout, 900);

but it is not helps me.

Link to Appium logs

Appium logs: https://gist.github.com/insidiaGithub/c652b3b96be4403d7a4f3489a5276055 Simulator logs: https://gist.github.com/insidiaGithub/e29c52e28e0d56986c583bdd53d353e9

Code To Reproduce Issue [ Good To Have ]

Random failed on random places

[mykola-mokhnach]

No I mean the one which is collected if showIOSLog cap is set to true

[youran1024]

When xcodebuild process is killed then WDA process is terminated as well, this is expected. Although, it is not clear why it is killed.

I understand. Thanks. May be it will be fixed with new xcode and ios13

when i restart the computer ，the problem is resolved。 good luck