“Uncaught Error: Received packet in the wrong sequ

问题:

When I set up a new project using Electron + Webpack + node MySQL my production build is throwing:

Uncaught Error: Received packet in the wrong sequence

The error goes away only if I keep: config.devtools = 'eval' in my production builds, apparently this will result in a larger file size and some performance issues which I would like to avoid.

Why my project / mysql module crashes with devtools set to ''?? I can hardly find similar reports, am I the only one having this issue?

webpack.config.js:

...

 if (process.env.NODE_ENV === 'production') {
      config.devtool = '' // <-------- mysql will throw Uncaught Error if I omit 'eval'

      config.plugins.push(
        new webpack.DefinePlugin({
          'process.env.NODE_ENV': '"production"'
        }),
        new webpack.optimize.OccurenceOrderPlugin(),
        new webpack.optimize.UglifyJsPlugin({
          compress: {
            warnings: false
          }
        })
      )
    }

home.js:

<script>
  var mysql = require('mysql')
  var connection = mysql.createConnection({
    host: 'localhost',
    user: 'root',
    password: 'password',
    database: 'EONIC'
  })

  connection.connect()
  connection.query('SELECT * from products', function (err, rows, fields) {
    if (err) throw err <---- here will the error happen
    console.log(rows)
  })

  connection.end()

</script>

source of the error in mysql/lib/protocol/Protocol.js at line 272:

 if (!sequence[packetName]) {
    var err   = new Error('Received packet in the wrong sequence.');
    err.code  = 'PROTOCOL_INCORRECT_PACKET_SEQUENCE';
    err.fatal = true;

    this._delegateError(err);
    return;
  }