Problems converting AppEngine backend into module

Question

I am trying to convert an AppEngine application, which used a backend into one using an module (as recommended by Google).

I converted the backends.yaml with backends_conversion.py app.yaml backends.yaml

During appcfg.py update producer.yaml

I than received the error, that the version "producer" already existed and that I should change the module name.

I didn't do that (because I use the module name as an taskqueue target). Instead I stopped and deleted the running backend version.

Upload the module worked afterwards.

But queuing task (via taskqueue) does not work (ie no instance of the module is started).

Also trying to address the module from the browser (producer.appid.appspot.com) prduces an http 503.

What's wrong?

[Update] We are adressing the backend explicitly:

taksqueue.add(..., target='producer')

The taskqueue documentation does not say how to do that with modules.

[Update] producer.yaml

admin_console:
  pages:
  - name: Initialize
    url: /init
api_version: '1'
application: lpsng2
basic_scaling:
  max_instances: '1'
builtins:
- remote_api: 'on'
default_expiration: 8d
env_variables:
  TMP: C:\temp
handlers:
- login: admin
  mime_type: image/vnd.microsoft.icon,
  secure: optional
  static_files: static/favicon.ico
  upload: static/favicon.ico
  url: /favicon.ico
- login: admin
  mime_type: image/png
  secure: optional
  static_files: static/images/lpsng_icon_os_144.png
  upload: static/images/lpsng_icon_os_144.png
  url: /apple-touch-icon-precomposed.png
- login: admin
  mime_type: application/x-chrome-extension
  secure: optional
  static_files: static/lpsng.crx
  upload: static/lpsng.crx
  url: /static/lpsng.crx
- http_headers:
    Vary: Accept-Encoding
  login: admin
  mime_type: image/png
  secure: optional
  static_files: static/\1.png
  upload: static/(.*).png
  url: /static/(.*).png
- http_headers:
    Vary: Accept-Encoding
  login: admin
  mime_type: image/jpeg
  secure: optional
  static_files: static/\1.jpg
  upload: static/(.*).jpg
  url: /static/(.*).jpg
- http_headers:
    Vary: Accept-Encoding
  login: admin
  secure: optional
  static_dir: static
  url: /static
- http_headers:
    Vary: Accept-Encoding
  login: admin
  secure: optional
  static_files: source/lib/ace/lib/\2
  upload: source/lib/ace/lib/(.*)
  url: /js/(.*)/lib/ace/lib/(.*)
- http_headers:
    Vary: Accept-Encoding
  login: admin
  secure: optional
  static_files: source/lib/ace/css/\2
  upload: source/lib/ace/css/(.*)
  url: /js/(.*)/lib/ace/css/(.*)
- http_headers:
    Vary: Accept-Encoding
  login: admin
  secure: optional
  static_files: source/lib/ace/mode/\2
  upload: source/lib/ace/mode/(.*)
  url: /js/(.*)/lib/ace/mode/(.*)
- http_headers:
    Vary: Accept-Encoding
  login: admin
  secure: optional
  static_files: source/lib/ace/mode/json/\2
  upload: source/lib/ace/mode/json/(.*)
  url: /js/(.*)/lib/ace/mode/json/(.*)
- http_headers:
    Vary: Accept-Encoding
  login: admin
  secure: optional
  static_files: source/lib/ace/mode/python/\2
  upload: source/lib/ace/mode/python/(.*)
  url: /js/(.*)/lib/ace/mode/python/(.*)
- http_headers:
    Vary: Accept-Encoding
  login: admin
  secure: optional
  static_files: source/lib/ace/theme/\2
  upload: source/lib/ace/theme/(.*)
  url: /js/(.*)/lib/ace/theme/(.*)
- http_headers:
    Vary: Accept-Encoding
  login: admin
  secure: optional
  static_files: source/lib/ace/worker/\2
  upload: source/lib/ace/worker/(.*)
  url: /js/(.*)/lib/ace/worker/(.*)
- http_headers:
    Vary: Accept-Encoding
  login: admin
  secure: optional
  static_files: source/lib/ace/\2
  upload: source/lib/ace/(.*)
  url: /js/(.*)/lib/ace/(.*)
- http_headers:
    Vary: Accept-Encoding
  login: admin
  secure: optional
  static_files: source/lib/ace/\2/\3/\4
  upload: source/lib/ace/(.*)/(.*) /(.*)
  url: /js/(.*)/lib/ace/(.*)/(.*)/(.*)
- http_headers:
    Vary: Accept-Encoding
  login: admin
  secure: optional
  static_files: buildout/\2
  upload: buildout/(.*)
  url: /js/(.*)/(.*)
- http_headers:
    Vary: Accept-Encoding
  login: admin
  secure: optional
  static_files: buildcss/\1
  upload: buildcss/(.*)
  url: /css/(.*)
- http_headers:
    Vary: Accept-Encoding
  login: admin
  secure: optional
  static_files: source/\2/\3
  upload: dummy/dummy.txt
  url: /source/(.*)/(.*)/(.*)
- http_headers:
    Vary: Accept-Encoding
  login: admin
  secure: optional
  static_files: source/\2
  upload: dummy/dummy.txt
  url: /source/(.*)/(.*)
- script: main.app
  secure: optional
  url: .*
inbound_services:
- xmpp_message
instance_class: B8
libraries:
- name: webapp2
  version: 2.5.2
- name: markupsafe
  version: '0.15'
- name: jinja2
  version: '2.6'
- name: PIL
  version: 1.1.7
module: producer
runtime: python27
skip_files: (?:^(.*/)?app\.yaml)|(?:^(.*/)?app\.yml)|(?:^(.*/)?index\.yaml)|(?:^(.*/)?index\.yml)|(?:^(.*/)?#.*#)|(?:^(.*/)?.*~)|(?:^(.*/)?.*\.py[co])|(?:^(.*/)?.*/RCS/.*)|(?:^(.*/)?\..*)|(?:^dev/(.*))|(?:^build/(.*))|(?:(.*/source/.*))|(?:^source1/lib/([^\/]*)$)|(?:^dist/(.*)$)|(?:^data/blob/(.*))|(?:^data/log/(.*))|(?:^data/temp/(.*))|(?:^data/db/(.*))|(?:^conf/standalone[.](.*))|(?:^conf/enterprise[.](.*))|(?:^standalone/(.*))|(?:^Output/(.*))|(?:^Microsoft.VC90.CRT/(.*))|(?:^notUsed/(.*))|(?:^(.*)\.pxd)
threadsafe: true
version: '2'

Answer 1

One approach: You can set up your dispatch file so that certain of your task handlers are routed to a specific module. Note: after you make changes to your dispatch.yaml file, you'll need to run

appcfg.py update_dispatch <proj_dir>