Could not start watchman; falling back to NodeWatcher for file system events

问题

I get the below error message while I switch between my ember applications: version: 2.4.2 Could not start watchman; falling back to NodeWatcher for file system events. Visit ember-cli.com for more info. Livereload server on http://localhost:49153 Could not serve on http://localhost:4200. It is either in use or you do not have permission.

Here are the packages that I have setup on my machine: npm --version 2.14.20 bower --version 1.7.7 ember --version 2.4.2 node: 4.4.0 os: linux x64

回答1:

Ember-cli (starting from release 0.1.3) requires watchman or some other service (e.g. NodeWatcher) for file watching.

You can find this info in the ember-cli release 0.1.3 changelog: https://github.com/ember-cli/ember-cli/releases/tag/v0.1.3

Although I believe you could use your Ember app without watchman, could you confirm that you already have watchman installed?

If not, here's what works fine for me in Ubuntu 64bit:

// installing watchman from source
git clone https://github.com/facebook/watchman.git
cd watchman
./autogen.sh
./configure
make
sudo make install

if you still have problems after installing try also resetting your watchman configuration:

watchman watch-del-all
watchman watch-del /home/myproject  // your project folder goes here...
watchman watch-project /home/myproject // your project folder goes

full installation instructions regarding watchman can also be found here https://facebook.github.io/watchman/docs/install.html

来源：https://stackoverflow.com/questions/36194758/could-not-start-watchman-falling-back-to-nodewatcher-for-file-system-events