Open Error: IO error Invalid argument

Hi, this is my first time using and learning about LevelDB with Node.js, and my simple app, can’t run, this is my simple code:

var
  level = require('level'),
  express = require('express'),
  uuid = require('node-uuid'),
  db = level('./users.db', {valueEncoding: 'json'}),
  app = module.exports = express();

app.use(express.logger('dev'));
app.use(app.router);

app.get('/users', function(req, res) {
  db.get('users', function(err, users) {
    if (err) return res.json(404, err);
    return res.json(200, users);
  });
});

app.post('/user', function(req, res) {
  db.put('users', req.body.user, function(err) {
    if (err) return res.json(404, err);
    return res.json(200);
  });
});

app.listen(5000, function() {
  console.log('LevelDB API running on port 5000');
});

And when I run: node app It throws the error:

OpenError: IO error: ./users.db/MANIFEST-000001: Invalid argument

I am using latest stable: Node.js 0.10.23

Does anybody can help me? Thanks!

[eugeneware]

Great news everyone (/cc @groundwater), the latest version of docker (you can register for at https://beta.docker.com/) which does NOT require virtualbox (uses xhyve under the hood - with the native hypervisor that comes with OS X) - doesn’t suffer from this mmap bug. You can happily create databases on your OS X host operating system, and volume map them to the xhyve docker host and it works beautifully! Woo!

You can read more about the new docker here and get the full docs here

It is a glorious day!

[eugeneware]

Hmm. Not sure what it could be. Most likely not an mmap() issue then which is the focus of this issue thread. I’d open up a new issue with some clear steps and code to replicate the issue.