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Node.JS: Getting error : [nodemon] Internal watch failed: watch ENOSPC Ask Question

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Node.JS: Getting error : [nodemon] Internal watch failed: watch ENOSPC Ask Question

I just installed Node.js on my Ubuntu 14.04 operating system for the first time. I also installed npm. The next step in my installation process was installing nodemon. This all worked out fine.

But, when I run nodemon by typing nodemon app.js in my command line, I get the following error...

[nodemon] 1.8.1 [nodemon] to restart at any time, enterrs [nodemon] watching: *.* [nodemon] startingnode app.js [nodemon] Internal watch failed: watch ENOSPC

In the command line below the error...

alopex@Alopex:~/Desktop/coding_dojo/week-9/javascript/node/testing_node$ Hello World

Why is this happening? Is this normal behavior for nodemon? If not, how can I fix it?

Side notes...

1) app.js is a Javascript file with console.log(111) inside of it.
2) node version is v0.10.25
3) npm version is 1.3.10
4) nodemon version is 1.8.1
5) ubuntu version is...

Distributor ID: Ubuntu
Description:    Ubuntu 14.04.3 LTS
Release:    14.04
Codename:   trusty

ベストアンサー1

It appears that my max ports weren't configured correctly. Here is the fix.

echo fs.inotify.max_user_watches=582222 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p

What this command does is to increase the number of watches allowed for a single user. By the default the number can be low (8192 for example). When nodemon tries to watch large numbers of directories for changes it has to create several watches, which can surpass that limit.

More explanation of how it solves the problem:
echo fs.inotify.max_user_watches=524288 it increase the number of watches of nodemon as you made some changes in your project and
sudo tee -a /etc/sysctl.conf && sudo sysctl -p is sysctl command for configure kernel parameters at runtime.
More on https://wiki.archlinux.org/title/kernel_parameters

You could also solve this problem by:

sudo sysctl fs.inotify.max_user_watches=582222 && sudo sysctl -p

But the way it was written first will make this change permanent.

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