Warning: unknown call: "relay:check"

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Environment

React Native Environment Info: System: OS: macOS 10.14.1 CPU: x64 Intel® Core™ i7-7700HQ CPU @ 2.80GHz Memory: 36.70 MB / 16.00 GB Shell: 5.3 - /bin/zsh Binaries: Node: 8.11.2 - /usr/local/bin/node Yarn: 1.6.0 - ~/.yarn/bin/yarn npm: 5.6.0 - /usr/local/bin/npm Watchman: 4.9.0 - /usr/local/bin/watchman SDKs: iOS SDK: Platforms: iOS 12.1, macOS 10.14, tvOS 12.1, watchOS 5.1 Android SDK: Build Tools: 23.0.1, 24.0.1, 25.0.1, 25.0.2, 25.0.3, 26.0.0, 26.0.1, 26.0.2, 27.0.3, 28.0.2, 28.0.3 API Levels: 21, 22, 23, 24, 25, 26, 27, 28 IDEs: Android Studio: 3.2 AI-181.5540.7.32.5056338 Xcode: 10.1/10B61 - /usr/bin/xcodebuild npmPackages: react: ^16.6.1 => 16.6.3 react-native: ^0.57.5 => 0.57.5 npmGlobalPackages: create-react-native-app: 1.0.0 react-native-cli: 2.0.1 react-native: 0.49.2

Description

When I run the app this warning unknown call: "relay:check" is given right on the beginning, in both ios and android emulators

[leoek]

You can disable the yellow box for this warning like this: YellowBox.ignoreWarnings(['unknown call: "relay:check"']);

Probably something which has to be fixed in the devtools.

[alloy]

It looks like the issue reported in the OP has been fixed in a release of the standalone React Native Debugger application https://github.com/jhen0409/react-native-debugger/issues/291#issuecomment-447794470