Won't Run on NPM Start Command

[lesreaper]

Description

Installing app and trying to run using:
react-vr init MyAppName
cd MyAppName
npm start

Expected behavior

Start server

Actual behavior

I get an error:

npm ERR! Darwin 16.1.0
npm ERR! argv "/usr/local/Cellar/node/7.0.0/bin/node" "/usr/local/bin/npm" "start"
npm ERR! node v7.0.0
npm ERR! npm  v3.10.8
npm ERR! code ELIFECYCLE
npm ERR! MyAppName@0.0.1 start: `node node_modules/react-native/local-cli/cli.js start`
npm ERR! Exit status 11
npm ERR! 
npm ERR! Failed at the MyAppName@0.0.1 start script 'node node_modules/react-native/local-cli/cli.js start'.

full npm-debug copy log

Additional Information

• react-vr package version: [0.1.0]
• react-vr-web package version: [0.1.0]
• Operating System: [MacOS Sierra 10.12.1]
• Graphics Card: [Intel Iris]
• Browser: [Chrome 54 or Firefox 49 ]
• VR Device: [Browser ]

[andrewimm]

Node conveniently has no documentation around exit code 11, so I'm working a bit blindly here, but 11 is typically associated with segfaults in other contexts. I notice you're running 7.0.0. Do you mind trying to update Node? I know the RN packager had a number of issues with 7.0.0

[lesreaper]

I tried using Node v7.2.1, 6.9.2, neither work. I tried but failed running it on port 3000 as well via:
npm start --port=3000

I also get this error, which I'm not familiar with. It may just be junk, I don't know.

2016-12-15 21:14 node[31591] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)
2016-12-15 21:14 node[31591] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)
2016-12-15 21:14 node[31591] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)
2016-12-15 21:14 node[31591] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)
 ERROR  Error watching file for changes: EMFILE
{"code":"EMFILE","errno":"EMFILE","syscall":"Error watching file for changes:","filename":null}
Error: Error watching file for changes: EMFILE
    at exports._errnoException (util.js:1022:11)
    at FSEvent.FSWatcher._handle.onchange (fs.js:1406:11)

[andrewimm]

Hmm, they may be related. Since you're on a Mac, I recommend installing Watchman, as described here: https://facebook.github.io/react-native/docs/getting-started.html

Watchman is a much more efficient filesystem watcher than the one that ships in Node, or native solutions like chokidar. It should resolve those file-watching errors, and will definitely make the actually development much faster.

[andrewimm]

I'm assuming you've also already tried blowing away the node_modules folder and retrying npm install?

[lesreaper]

I tried blowing away node_modules on 6.9.2 and 7.2.1, and neither worked.

I installed Watchman, blew away the node-modules, npm install, and then it didn't crash. I went to the URL http://localhost:8081/vr/ and it loaded.

I don't know why that was the solution, but it might be something to add to the documentation for a later note. As of right now I use React.js, not React Native, so didn't think of that. Thanks for the help.

[andrewimm]

Thanks, I'll be sure to update the documentation to clarify that we're using the packager from React Native, and probably add a section about Watchman for Mac/Linux users. For the initial documentation, we didn't want the setup process to be too overwhelming, since things should work without Watchman, but it drastically improves the experience.

[rpgroot]

thanks @andrewimm , install watchman solve my problem