[1.2.4][siena-2.0.7][gae-1.6.0] play gae:deploy doesn't seem to send info on backends.xml to AppSpot

[jesusvp]

Hello!

I'm trying to use backends on GAE but I've got the impression that I'm missing something. I created a backends.xml file in war/WEB-INF (at the same level as appengine-web.xml) with the following content:

<?xml version="1.0" encoding="UTF-8"?>

<backends>

  <backend name="backup">

    <class>B1</class>

    <instances>1</instances>

  </backend>

</backends>

When I deploy the app with play gae:deploy I can see on the console that it is parsed:

INFO: Successfully processed /var/folders/6q/7kj374f17vj_f2vhb0dcthq80000gp/T/(nameofapp).war/WEB-INF/backends.xml

Beginning server interaction for (nameofapp)...

However, when I go to my app's backends administration page I only see a message explaining that I have not created backends for my application and that I need to define them using backends.xml for Java.

Has anybody used backends or been able to configure them on GAE?

Thank you for your help.

Jesús