React native debugger won't attach

[davidliu]

Issue and Steps to Reproduce

Attempting to attach the React Native debugger results in nothing happening. The "Starting debugger" messaging shows up and then disappears soon after, with no error messages.

1. Start metro packager from within Nuclide or from command line.
2. Enable remote debugging on device (either iOS or android)
3. Close chrome debugger ui
4. Attempt to attach debugger from Nuclide

Expected Behavior

Debugger should attach, or if unable to, should provide some error log explaining why.

Actual Behavior

Debugger neither attaches nor provides error logs.

Versions

• Atom: 1.28.0
• Nuclide: 0.317.0
• Client OS: Mac 10.12.6

Additional Details

• Installed packages (apm ls --installed):

├── MagicPython@1.0.12
├── atom-import-js@0.15.0
├── file-icons@2.1.21
├── highlight-selected@0.13.1
├── language-babel@2.85.0
├── language-graphql@0.10.1
├── language-haskell@1.17.8
├── language-ini@1.20.0
├── language-kotlin@0.5.0
├── language-lua@0.9.11
├── language-ocaml@1.9.5
├── language-rust@0.4.12
├── language-scala@1.1.9
├── language-swift@0.5.0
├── language-thrift@1.0.2
├── linter@2.2.0 (disabled)
├── nuclide@0.317.0
├── nuclide-format-js@0.0.46
├── prettier-atom@0.54.0
├── set-syntax@0.4.0
├── sort-lines@0.18.0
└── tool-bar@1.1.7

[andrejcesen]

I just tested different versions of Nuclide and it seems like the breaking change was introduced with v302.

[davidliu]

Thanks @andrejcesen for the temporary workaround version!

[sintylapse]

@davidliu so downgrading to nuclide v0.302 will fix that?

[pelmers]

At the time I upgraded the library, I did check to make sure it worked with react native 0.50, on both android and ios emulators ( and android device ). What version of react native are you using, and what is the target type (device/emulator/android/ios)?

[davidliu]

At the time, React Native 0.54. The target was iOS 11.2 emulator, and a Pixel running Android 8.1.0, though debugger attaches to the Metro bundler?

[ThomasGHenry]

any news on this? thanks!

[CoderCharlie]

Having the same issue on Mojave 10.14.1, nuclide 0.366.0, react-native 0.57.4.
After running the sample app with react-native run-ios and go back to nuclide, try to attach on react-native with port 8081, get a result "The debugger is not attached.".