ng serve not detecting file changes

[harilalinapp]

Please provide us with the following information:

1. OS? Windows 7, 8 or 10. Linux (which distribution). Mac OSX (Yosemite? El Capitan?)
   ubuntu 16.04
2. Versions. Please run ng --version. If there's nothing outputted, please run
   in a Terminal: node --version and paste the result here:
   angular-cli: 1.0.0-beta.16
   node: 6.6.0
   os: linux x64
3. Repro steps. Was this an app that wasn't created using the CLI? What change did you
   do on your code? etc.
   created new project nothing changed only changed the title
4. The log given by the failure. Normally this include a stack trace and some
   more information.
5. Mention any other details that might be useful.

While updating the source files the build is not auto updating the app

---

Thanks! We'll be in touch soon.

[paillave]

I face the very same issue except that my angular-cli version is 1.0.0-beta.15.
It used to work in a previous version on the same computer

[dagilleland]

Same here on
OS: Windows 10
angular-cli: 1.0.0-beta.16
node: 6.6.0

[bonnici]

Maybe a duplicate of #2356 - does the path to your project folders include a space?

[harilalinapp]

@bonnici no the path doesn't have any space or special character. The path is /home/harilal/works/ng2/routing/

To my wonder after removing global angular-cli and removing the nod-modules and reinstalling after cleaning the cache it worked. I need to check whether it will work next time.

[paillave]

At my side, I found the issue: the system that detects changes (inotify) can't handle so much watches by default.
To change the amount of watches it can handle (=the maximum amount of files that will be in the project) you must run this command:
echo 65536 | sudo tee -a /proc/sys/fs/inotify/max_user_watches
The problem with inotify is reseting this counter every time you restart your computer.
In the previous version, there was an alert to tell that the whole project couldn't be observed. So we knew we had to run this command. It's not the case anymore.
Something, somehow, somewhere should be done so that this file detection always works out of the box on linux.

[harilalinapp]

@paillave I think that's solved my issue. Now the project files gets compiled and it's updating. But i need to check after restarting the system. Last time when i reinstalled the angular-cli it's worked. BUt next day it's stopped working. I will update the issue once i have tested that also.

[paillave]

@harilalinapp out of angular 2 app, many have the same issue with inotify, especially on ubuntu: http://askubuntu.com/questions/716431/inotify-max-user-watches-value-resets-on-reboot-how-to-change-it-permanently,
Here is the solution... (dunno it this actually works):
https://bbs.archlinux.org/viewtopic.php?id=193020
or
https://github.com/guard/listen/wiki/Increasing-the-amount-of-inotify-watchers

[harilalinapp]

@paillave Thanks for the support. I have to run the command each time at restart. Anyway it's works thanks.

[ridly]

Thank you @paillave seems to be an issue on Ubuntu and the fix is

echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p

as highlighted on
https://github.com/guard/listen/wiki/Increasing-the-amount-of-inotify-watchers

[filipesilva]

Closed in favor of #1610, linking @paillave's solution there.

[TheCodonist]

just remove spaces and special characters from all root directories of project directory(inclusive).

[llstarscreamll]

@paillave thank you, works fine!!

[shoaib0077]

Same issue,
Angular CLI : 1.0.0-beta.28.3
Node: 7.5.0
OS : Win32 x64

No spaces to app .. here's the path : c:\dev\myapp

I reinstalled node and angular a couple of time but nothing worked.