Could not find watchman, falling back to NodeWatcher for file system events

Ember CLI
1

I just updated to Ember-CLI v0.1.4 on ubuntu 14.04 (NOT Windows) and followed all of the instructions for setup and upgrading my project. However, now I get the following warning:

kiffin@T431s:book-ember-cli-101 $ ember s
version: 0.1.4
Could not find watchman, falling back to NodeWatcher for file system events
Livereload server on port 35729
Serving on http://0.0.0.0:4200/

Build successful - 509ms.

So why can’t it find watchman any more?

Also created a Github Issue.

1 Like
2

I also updated to Version: 0.1.4 and i’m having the same issue.

3
4

@rwjblue Just for clarification, watchman on npm is not the same as that one, correct? It should be installed via Brew.?.

5

Correct, they are not the same thing.

6

Excuse my ignorance but what’s the benefit of using Watchman over NodeWatcher? Native file watching vs shimming through node?

1 Like
7

My understanding is that watchman allows file watching using fewer file descriptors by watching a directory root for changes below it instead of watching files individually…

1 Like
8

I am having the same message displayed and I have installed watchmen using brew. If I try to run brew install watchman, I get the following message: watchman-3.0.0 already installed

Any ideas how can I fix this?

Thank you

9

Just for information’s sake I have a similar error to @mupkoo . My order of events was:

> ember --version
version: 0.2.0
Could not find watchman, falling back to NodeWatcher for file system events
node: 0.12.0
npm: 2.7.0

Installed watchman on Mac

> brew install watchman
> ember --version
version: 0.2.0
invalid watchman found, version: [2.9.8] did not satisfy [^3.0.0], falling back to NodeWatcher
node: 0.12.0
npm: 2.7.0

Tried to update to HEAD for watchman

> brew unlink watchman
> brew install --HEAD watchman
> ember --version
version: 0.2.0
Could not find watchman, falling back to NodeWatcher for file system events
node: 0.12.0
npm: 2.7.0

Something is going on (on the Mac at least) where it both wants but doesn’t recognize watchman 3.0.0

1 Like
10

which -a

Will tell you which watchmans you have. I suspect you installed the one from npm by mistake.

npm uninstall -g watchman

Will likely help

11

its working fine. Is there any way if I want to fix Wathman because here it is falling back to NodeWatcher.

12

I also had a run-in with this situation. For Ubuntu users, this short post is how I got unstuck.