/_ah/queue/deferred strange import error

django, djangoappengine, google-app-engine, python

Solution

Found out that my code used old CGI interface instead of the newer WSGI. I Fixed this and the problem didn't return since.

Updated `app.yaml`:

handlers:
- url: /_ah/queue/deferred
  script: djangoappengine.deferred.handler.application
  login: admin

Problem

I have a django 1.5 running on Google App Engine using the `djangoappengine` module for the stitching. Everything works fine, except that about a half of the calls to /_ah/queue/deferred raise the following import error: ``` Traceback (most recent call last): File "..../third_party/djangoappengine/deferred/handler.py", line 2, in <module> from djangoappengine import main ImportError: No module named djangoappengine ``` As you can see, the djangoappengine module sits inside the `third_party` directory, and this directory is added to `sys.path` in the `appengine_config.py` file, so there shouldn't be any problems doing `from djangoappengine import main`: ``` sys.path.insert(0, os.path.join(os.path.dirname(__file__), 'third_party')) ``` The relevant line in `app.yaml` is: ``` handlers: - url: /_ah/queue/deferred script: third_party/djangoappengine/deferred/handler.py login: admin ``` What is causing these sporadic import errors? Am I doing something wrong? Maybe there's an import loop I'm not aware of?

Original source