Bug in pool.end () never returns when trying to close cleanly

[mehtcrystals]

I have the following code to terminate nodejs cleanly:

process.on('SIGINT', () => {
  console.info('Señal SIGINT recivida');
  console.log('Cerrando el servidor....');
  server.close(() => {
    console.log('Servidor http detenido');
    pool.end()
    .then(() => {
      console.log('\u001b[36m\u001b[1mConexion a la base de datos terminada\u001b[0m\n')
      process.exit(0)
    })
  });
});

but when I call pool.end() it just doesn't return to execute what's in the .then ()

[AleCaste]

The same thing happens to me using client.end()