Question: Error: EMFILE: too many open files

At first, thanks for this reader.

I want to read over 80k mp3 tags for my Software. But after 7k the performance break down an finished with:

Error: EMFILE: too many open files....

Can someone help me to queue the async calls, with async or something like that: https://caolan.github.io/async/docs.html#queue

Thanks

me code now is:

walker = walk.walk("/Volumes/..");
var mm = require('music-metadata');
const util = require('util');
walker.on("file", function (root, fileStats, next) {
 //todo, noch die anderen file extension freigeben
 if (path.extname(fileStats.name) === ".mp3") {
   mm.parseFile(path.join(root, fileStats.name)).then(function (metadata) {
     console.log(util.inspect(metadata, { showHidden: false, depth: null }));
   }).catch(function (err) {
     console.error(err.message);
   });
 }
 next();
});

[Borewit]

Following code parsed 48k files without any issue:

const walk = require('walk')

var mm = require('music-metadata');
const util = require('util');
const path = require('path');

const walker = walk.walk("M:\\");

var filesParsed = 0;

walker.on("file", function (root, fileStats, next) {
  switch(path.extname(fileStats.name)) {
    case ".mp3":
    case ".flac":
      // Queue (asynchronous call) parsing of metadata
      mm.parseFile(path.join(root, fileStats.name)).then(function (metadata) {
        // console.log(util.inspect(metadata, { showHidden: false, depth: null }));
        console.log('Parsed %s files, last file: %s',  ++filesParsed, fileStats.name);
        next(); // asynchronous call completed, 'release' next
      }).catch(function (err) {
        console.error(err.message);
        next();
      });
      break;
    
    default:
      next(); // Go to next file, no asynchronous call 'queued'
  }
});

[Newan]

Version 0.8.0 works even better. if the mp3 collection is free from scrap all works fine. If not, you have an problem not the lib…

Thanks for the great support!