Exemple of request that silently fail in Play 2.1

Application.scala

package controllers

import play.api._
import play.api.mvc._

object Die {

  def potato = "not today"

  val iLikeTrain = ???

}

object Application extends Controller {

  def index = Action {
    Die.potato  // Nooooooooo !
    Ok(views.html.index("Your new application is ready."))
  }

}

Explanation.md

The ??? method returns a MethodUndefinedException error, so the Die object can't be initialized. But the initialization seems to be lazy.

When the index action try to call Die.potato, the object is initialized, fails, and then an error is thrown.