[packager] Hangs on: index.ios.js [development, non-minified, hmr disabled] 0%

[dluksza]

Is this a bug report?

Yes

Have you read the Bugs section of the How to Contribute guide?

Yes

Environment

1. react-native -v:
   react-native-cli: 2.0.1
   react-native: 0.47.0
2. node -v:
   v8.2.1
3. npm -v:
   5.3.0
4. yarn --version:
   0.27.5

Then, specify:

• Target Platform: iOS, Android

• Development Operating System: macOS

• Build tools: xcode, android studio.

Steps to Reproduce

(Write your steps here:)

1. Start new project with react-native init BuildHangs
2. Run react-native run-ios within BuildHangs directory
3. Wait for ever for packager to build index.ios.js file.

Expected Behavior

Initial react-native application should start on iphone emulator.

(Write what you thought would happen.)

Actual Behavior

Nothing happen, it seams like index.ios.js file is not compiled, compilation process hangs (or exit). Packager hangs with output:

Loading dependency graph...
Bundling `index.ios.js`  [development, non-minified, hmr disabled]  ░░░░░░░░░░░░░░░░  0.0% (0/1)

(Write what happened. Add screenshots!)

Everything was working fine until today afternoon when it immediately stopped working. Probably brew update && brew upgrade has updated /something/ and react-native got broken.

Reproducible Demo

(Paste the link to an example project and exact instructions to reproduce the issue.)

[nonewcode]

+1

2017-08-02 22:22:12.250 [warn][tid:main][RCTBridge.m:114] Class RCTCxxModule was not exported. Did you forget to use RCT_EXPORT_MODULE()?

[prakashsejwani]

+1

I think its watchman issue which is upgrade via brew, when i uninstall watchman, its working

[nonewcode]

Can confirm @prakashsejwani. Uninstalling watchman brew uninstall watchman got this working again for me as well.

[dluksza]

Uninstalling watchman fixed this issue for react demo app, but in my main project I'm facing issue described in #910

[fungilation]

Not sure if related, but regarding watchman my Packager console has this output on RN 0.47.0:

React packager ready.

Loading dependency graph.../Users/<user>/Library/LaunchAgents/com.github.facebook.watchman.plist: Could not find specified service

Loading dependency graph, done.
Bundling `index.ios.js`  [development, non-minified, hmr disabled]  ░░░░░░░░░░░░░░░░  0.0% (0/1)Launching Dev Tools...
Bundling `index.ios.js`  [development, non-minified, hmr disabled]  100.0% (599/599), done.

EDIT: the "watchman.plist: Could not find specified service" line no longer appears on run-ios, on RN 0.47.1

[dluksza]

Running launchctl unload -F $HOME/Library/LaunchAgents/com.github.facebook.watchman.plist fix both issues for me. Now I'm able to run react-native with watchman again :)

Thanks to @danielfarrell for figuring this out on facebook/watchman#511 (comment)

[youmyyou]

@dluksza how to open hmr?

[dluksza]

@youmyyou I don't know how to open hmr, never did that and never was interested in opening it

[prank7]

@youmyyou did you figure out how to open hmr?

[olviejs]

@JoshuaKelly work for me, tks.

[faizmokh]

I'm currently experiencing the same issue too right now. Uninstalling watchman only worked the first time. Running launchctl unload -F $HOME/Library/LaunchAgents/com.github.facebook.watchman.plist also doesn't work.

[iMokhles]

#15671 i fixed this issue and posted my fix hope It helps you

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Maybe the issue has been fixed in a recent release, or perhaps it is not affecting a lot of people. If you think this issue should definitely remain open, please let us know why. Thank you for your contributions.