It probably is a Datastore timeout. If you retry it mostly works.

2009/3/23 neoedmund <neoedm...@gmail.com>:
>
> why this happens?
>
> a model has 100,000+ entries in it.
> q=Foo.all()
> e=q.get()
>
> error occurs:
>
>  File "/base/python_lib/versions/1/google/appengine/ext/db/
> __init__.py", line 1346, in get
>    results = self.fetch(1)
>  File "/base/python_lib/versions/1/google/appengine/ext/db/
> __init__.py", line 1390, in fetch
>    raw = self._get_query().Get(limit, offset)
>  File "/base/python_lib/versions/1/google/appengine/api/datastore.py"
> , line 942, in Get
>    return self._Run(limit, offset)._Next(limit)
>  File "/base/python_lib/versions/1/google/appengine/api/datastore.py"
> , line 886, in _Run
>    _ToDatastoreError(err)
>  File "/base/python_lib/versions/1/google/appengine/api/datastore.py"
> , line 1965, in _ToDatastoreError
>    raise errors[err.application_error](err.error_detail)
> Timeout
> >
>

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