Flaky Builds Due to Not being Able Find iPhone 6

Feedback & Bug Reports
1

We keep getting failure issue on circle every few builds. We are using circle 2.0 and targeting Xcode 9.3.1.

Our destination that we provide to xcodebuild is platform=iOS Simulator,OS=latest,name=iPhone 6

Here is the error.

xcodebuild: error: Unable to find a destination matching the provided destination specifier:
		{ platform:iOS Simulator, OS:latest, name:iPhone 6 }

	The requested device could not be found because no available devices matched the request.

	Ineligible destinations for the "AllUnitTests" scheme:
		{ platform:iOS, id:dvtdevice-DVTiPhonePlaceholder-iphoneos:placeholder, name:Generic iOS Device }
		{ platform:iOS Simulator, id:dvtdevice-DVTiOSDeviceSimulatorPlaceholder-iphonesimulator:placeholder, name:Generic iOS Simulator Device }
2

I noticed this issue recently, after migrate to 9.4.0 image. Very often the build will fail due to this error, and when rerun it with ssh, it will work.

3

If it always runs using SSH, is it worth doing a small sleep at start-up, in case servers just need some time to get ready? Maybe even 5-10 sec would do it.

4

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