EMFILE + ENOSPC errors swallowed by Grunt hook instead of being logged as errors

[mikermcneil]

For reference:

In Sails v0.11.3, with:

"grunt": "0.4.5",
    "grunt-contrib-clean": "0.6.0",
    "grunt-contrib-coffee": "0.13.0",
    "grunt-contrib-concat": "0.5.1",
    "grunt-contrib-copy": "0.5.0",
    "grunt-contrib-cssmin": "0.9.0",
    "grunt-contrib-jst": "0.6.0",
    "grunt-contrib-less": "1.1.0",
    "grunt-contrib-uglify": "0.7.0",
    "grunt-contrib-watch": "0.6.1",
    "grunt-sails-linker": "0.10.1",
    "grunt-sync": "0.2.4",

∑ npm -v
2.8.4
∑ node -v
v0.10.26

EMFILE errors from Grunt are being swallowed (logged as verbose), e.g.:

verbose: Grunt :: Warning: EMFILE: Too many opened files.
verbose: Grunt :: Running "watch" task

Haven't had a chance to test yet to see if this is occurring in 0.11.4 or the 0.12.0 prerelease, but leaving this as a note in the mean time.

[mikermcneil]

As a side note, it seems that there are other issues with [email protected]. Changes to deeply nested files are not noticed-- switching to [email protected] seems to solve the problem. Will need to dig deeper into this grunt plugin to see if there are any related issues there (otherwise we'll have to revert to 0.5.x as the generatd dep version in new sails apps)

[mikermcneil]

Created separate issue for the issue with [email protected] not noticing events for nested files/directories (it's a separate problem)

[mikermcneil]

Just verified that this actually happening on [email protected] as well (earlier when I thought it had been solved, apparently I was wrong).

Full details:

∑ npm -v
2.8.4
∑ node -v
v0.10.26

"grunt": "0.4.5",
    "grunt-contrib-clean": "0.6.0",
    "grunt-contrib-coffee": "0.13.0",
    "grunt-contrib-concat": "0.5.1",
    "grunt-contrib-copy": "0.5.0",
    "grunt-contrib-cssmin": "0.9.0",
    "grunt-contrib-jst": "0.6.0",
    "grunt-contrib-less": "1.1.0",
    "grunt-contrib-uglify": "0.7.0",
    "grunt-contrib-watch": "0.5.3",
    "grunt-sails-linker": "0.10.1",
    "grunt-sync": "0.2.4",

verbose: Grunt :: Warning: EMFILE, too many open files 'assets'
verbose: Grunt :: Running "watch" task

[mikermcneil]

Argh- meant to say EMFILE not "ULIMIT".

If you're reading this and haven't had to deal w/ EMFILE errors before, here's how you solve it on OS X for reference:

ulimit -n 1024

^^ that'll last as long as a terminal window is open. Also note that more recent versions of OS X don't allow you to specify a ulimit much higher than 1024.

Update

If you're on Linux, you might be seeing ENOSPC instead. In that case, check out:
https://stackoverflow.com/questions/16748737/grunt-watch-error-waiting-fatal-error-watch-enospc

(The solution is similar, you just need to run a different command.)