ENOSPC troubleshooting

setup.js

var fs = require('fs');
var crypto = require('crypto');
var path = require('path');
var mkdirp = require('mkdirp');

var count = 2863 * 8;
var dirs = [n()];

while (count > 0) {
  if (Math.random() < 0.66) {
    var index = Math.floor(Math.random() * dirs.length);
    dirs[index] = path.join(dirs[index], n());
  } else {
    dirs.push(n());
  }
  count -= 1;
}

console.log("making directories...");
dirs.forEach(function(dir) {
  mkdirp(path.join("lots-of-dirs", dir), noop);
});

function n() {
  return crypto.pseudoRandomBytes(4).toString('hex');
}

function noop() {}

test.js

var fs = require('fs');
var findit = require('findit');

var walker = findit('lots-of-dirs');
var count = 0;
walker.on('directory', function(filename) {
  try {
    fs.watch(filename, {persistent: true}, onChange);
    count += 1;
  } catch (err) {
    if (err.code === 'ENOSPC') {
      console.log("caught ENOSPC", count);
    }
  }
});

function onChange(event, filename) {
  console.log("event", event, "filename", filename);
}