Question

I’m trying to get a backend instance running on GAE Java but it’s not working.

I have read the docs here http://code.google.com/appengine/docs/java/backends/overview.html

These are the steps I have taken:

1. Created a file named backends.xml with the following content

<backends>
   <backend name="backend_test">
      <class>B1</class>
      <instances>;2</instances>
   </backend>
</backends>

1. uploaded app to app engine and checked console. Nothing there.

2. Used AppCfg command of appcfg.sh backends <PATH-TO-WEB-INF> start <BACKEND-NAME>

I get a problem with step 3 where it says

400 Bad Request
Starting backend: backend_test
Backend 'backend_test' has not been defined.

But i have defined this in the backends.xml file.

Answer 1

You need to upload the backend definition with appcfg.sh backends update as documented here.