Is it possible an earlier request running on the same instance died with a Deadline Exceeded exception halfway through importing the file that defined that class? This sort of corrupt instance problem has been reported before, and unless you were in the middle of a deploy during those few seconds or you're doing something extremely odd with conditionally defining the MyModelX class I can't think of another cause.
On Aug 13, 4:01 am, djidjadji <[email protected]> wrote: > I just got this error while processing a request > > KindError: No implementation for kind 'MyModelX' > > I returned to the home page and requested the same page again a few > seconds later and the error was gone. > Now it can find the implementation. > > I use the Python API, and the error was raised during fetching a > ReferenceProperty object. > > It was not a datastore timeout because the CPU usage was > > ms=79 cpu_ms=100 api_cpu_ms=42 > > What can be the cause of this failure to find an implementation for a kind? > > ------------------ > File > "/base/python_runtime/python_lib/versions/1/google/appengine/ext/db/__init_ > _.py", > line 3206, in __get__ > instance = get(reference_id) > File > "/base/python_runtime/python_lib/versions/1/google/appengine/ext/db/__init_ > _.py", > line 1314, in get > cls1 = class_for_kind(entity.kind()) > File > "/base/python_runtime/python_lib/versions/1/google/appengine/ext/db/__init_ > _.py", > line 267, in class_for_kind > raise KindError('No implementation for kind \'%s\'' % kind) > KindError: No implementation for kind 'MyModelX' -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
