Packager fails on macOS 10.12 Sierra

I have upgraded to the macOS Sierra beta yesterday, and the React Native Packager seems to fail. I’ve tried to reinstall the dependencies, but no use.

The output of the packager is this:

[11:45:02 AM] <START> Building Dependency Graph
[11:45:02 AM] <START> Crawling File System
[Hot Module Replacement] Server listening on /hot

React packager ready.

2016-08-09 11:45 node[6397] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)
2016-08-09 11:45 node[6397] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)
2016-08-09 11:45 node[6397] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)
 ERROR  watch null EMFILE
{"code":"EMFILE","errno":"EMFILE","syscall":"watch null","filename":null}
Error: watch null EMFILE
    at exports._errnoException (util.js:873:11)
    at FSEvent.FSWatcher._handle.onchange (fs.js:1217:21)

The only reference to that specific error I have found is this old issue on the Node 0.10 repo’s. I have tried the ‘fix’ in that topic, namely increasing the open file references limit. That didn’t work.

The issue occurs on both Node 4.4.7 and 6.3.1, on macOS Sierra 10.12 on a MBP 2015 15". Does anyone know what is going on here?

[mc13an]

Credit to @passwd for figuring this out

We were able to get it to work by increasing the max file limit and moving to watchman v4.6.0

here are the steps we followed:

1. increase max file limt

# check open file limit
sysctl kern.maxfiles

# edit sysctl
sudo vim /etc/sysctl.conf

# add these two lines
kern.maxfiles=10485760
kern.maxfilesperproc=1048576

# reboot
sudo reboot

# check new file limit
sysctl kern.maxfiles

2. upgrade to watchman 4.6

# clone repo
git clone https://github.com/facebook/watchman.git

# change to master branch
git checkout -b v4.6.0 v4.6.0

# run compiler
./autogen.sh
./configure --enable-lenient --without-pcre --with-python
make
sudo make install

# check watchman version
watchman -v

# result should be 4.6.0

[hghinaglia]

FINALLY!!!

I ran the watchman watch-list command, then the error suggested me to run chmod 0700 /usr/local/var/run/watchman/<USER>-state as @oscart said, then it worked!!