react-native: MacOS Sierra Error with EMFILE upon NPM start

I’d like to add that I’ve been running the packager without watchman for 3-4 months because React Native’s Node packager doesn’t depend on watchman. However, after upgrading to macOS Sierra the Node packager started failing with the above errors. Installing the current version of watchman (brew install watchman) did solve the issue for me, but something obviously regressed and it would be good to understand what that is.

The problem can be solved by reinstalling react-native-cli:

npm uninstall -g react-native-cli
npm install -g react-native-cli

I was checking watchman issues and found out this one: https://github.com/facebook/watchman/issues/358

When running watchman watch-list I got some permissions error.

chmod 0700 /usr/local/var/run/watchman/<USER>-state worked for me.

brew install watchman solved it for me but had to update xcode to 8.1 also in order to install watchman.

This answer(facebook/react-native#9309) work to me. I create and eidt new sysctl.conf and install watchman through homebrew.

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

Installing watchman worked for me.

@gnestor needed to install watchman - thanks!

I reinstall node, watchman, npm and etc, finally everything goes fine! I think new updates about supporting mac OS Sierra were included in the package. brew install node brew install watchman brew link automake pcre npm install -g react-native-cli export ANDROID_HOME=~/Library/Android/sdk export PATH=${PATH}:${ANDROID_HOME} react-native run-android

@bbb324 Could you try install watchman by homebrew

brew install watchman worked for me.

If you are still getting this error and are using tmux on MacOS Sierra, try open a new terminal without tmux and run ‘watchman version’. After doing that, it was fixed for me within tmux.

@Luavis holy cow after 2-3 hours of searching, setting kern.maxfiles! Never would have got it. Thank you!

Have you checked the solutions in https://github.com/facebook/react-native/issues/9309?

@Luavis i install watchman by homebrew thanks!!

Just FYI, I did not change the kern maxfiles, I only installed watchman.

$ sysctl kern.maxfiles
kern.maxfiles: 12288
$ sysctl kern.maxfilesperproc
kern.maxfilesperproc: 10240

perhaps there are two separate issues here - the project that I am building is pretty small and simple at the moment.

Thanks to @Luavis , I followed his steps, still resulted in failure. In my case, need another operation that mentioned below: https://github.com/facebook/react-native/issues/910#issuecomment-94181845

@Luavis still didn’t work, when I execute ./autogen.sh

./autogen.sh: line 9: aclocal: command not found ./autogen.sh: line 10: autoheader: command not found ./autogen.sh: line 11: automake: command not found ./autogen.sh: line 12: autoconf: command not found

resolved via: https://github.com/leecade/rn-notes/issues/21