[google-appengine] No implementation for kind 'ext_model'

[Alan Xing]

Hi folks,

Any one know how to resolve this issue. This problem started to happen on
one of our test app-id, after we utilized more of the deferred queue
capability. The problem doesn't happen on another test app-id with the same
code deployed.

Thanks,
Alan


   1.  12-18 07:55AM 15.290 /_ah/queue/deferred 500 5549ms 125cpu_ms
   8api_cpu_ms 0kb AppEngine-Google; (+http://code.google.com/appengine) See
   
details<https://appengine.google.com/logs/log_detail?app_id=sa-qa7&version_id=3.338537801714179962&request_id=00047B02C4541CBA.809E2F7F&layout=plain>

   0.1.0.2 - - [18/Dec/2009:07:55:20 -0800] "POST /_ah/queue/deferred
HTTP/1.1" 500 124
"http://sa-qa7.appspot.com/api/posting/rule/article/cron_post";
"AppEngine-Google; (+http://code.google.com/appengine)"
"sa-qa7.appspot.com"

    2.  I 12-18 07:55AM 19.974

   X-Appengine-Taskretrycount:18, X-Appengine-Queuename:default,
X-Appengine-Taskname:10017694841148730053

    3.  E 12-18 07:55AM 20.289

   No implementation for kind 'ext_model'
   Traceback (most recent call last):
     File "/base/python_lib/versions/1/google/appengine/ext/webapp/__init__.py",
line 509, in __call__
       handler.post(*groups)
     File 
"/base/python_lib/versions/1/google/appengine/ext/deferred/deferred.py",
line 255, in post
       run(self.request.body)
     File 
"/base/python_lib/versions/1/google/appengine/ext/deferred/deferred.py",
line 124, in run
       return func(*args, **kwds)
     File 
"/base/python_lib/versions/1/google/appengine/ext/deferred/deferred.py",
line 144, in run_from_datastore
       entity = _DeferredTaskEntity.get(key)
     File "/base/python_lib/versions/1/google/appengine/ext/db/__init__.py",
line 951, in get
       results = get(keys)
     File "/base/python_lib/versions/1/google/appengine/ext/db/__init__.py",
line 1191, in get
       cls1 = class_for_kind(entity.kind())
     File "/base/python_lib/versions/1/google/appengine/ext/db/__init__.py",
line 225, in class_for_kind
       raise KindError('No implementation for kind \'%s\'' % kind)
   KindError: No implementation for kind 'ext_model'

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