Google app engine bulkloader opens empty file at upload

Question

I'm running the following two commands:

appcfg.py download_data --kind=Journal --url=http://appname.appspot.com/_ah/remote_api --filename=Journals.sql3
appcfg.py upload_data --url=http://localhost:8080/_ah/remote_api --kind=Journal --filename=Journals.sql3

The first one successfully downloads the data in the following files: bulkloader-results-20130718.112127.sql3 Journals.sql3 No errors whatsoever. When I open the file in notepad, it looks like the data is in there.

The second one opens a random new empty file each time I run it (e.g. bulkloader-progress-20130718.115805.sql3). Then it gives the following error log:

INFO     2013-07-18 11:54:48,930 module.py:595] default: "POST /_ah/remote_api HTTP/1.1" 200 96
INFO     2013-07-18 11:58:17,563 module.py:595] default: "GET /_ah/remote_api?rtok=36123921049 HTTP/1.1" 200 64
INFO     2013-07-18 11:58:20,609 module.py:595] default: "GET /_ah/remote_api HTTP/1.1" 200 37
ERROR    2013-07-18 09:58:20,618 handler.py:384] Exception while handling service_name: "datastore_v4"
method: "AllocateIds"
request: ""
Traceback (most recent call last):
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\remote_api\handler.py", line 380, in post
    response_data = self.ExecuteRequest(request)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\remote_api\handler.py", line 411, in ExecuteRequest
    response_data)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\api\apiproxy_stub_map.py", line 94, in MakeSyncCall
    return stubmap.MakeSyncCall(service, call, request, response)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\api\apiproxy_stub_map.py", line 328, in MakeSyncCall
    rpc.CheckSuccess()
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\api\apiproxy_rpc.py", line 156, in _WaitImpl
    self.request, self.response)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\remote_api\remote_api_stub.py", line 200, in MakeSyncCall
    self._MakeRealSyncCall(service, call, request, response)
  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\remote_api\remote_api_stub.py", line 234, in _MakeRealSyncCall
    raise pickle.loads(response_pb.exception())
AttributeError: 'NoneType' object has no attribute 'THREADSAFE'
INFO     2013-07-18 11:58:20,622 module.py:595] default: "POST /_ah/remote_api HTTP/1.1" 200 96

What am I doing wrong?

EDIT: Still no solution. What is funny is that uploading on the app engine server does work.

Answer 1

Looks like there's a ticket for this issue, and it's related to the latest version of the Python dev server (1.8.2).

As suggested on the ticket, I downgraded my dev server to the previous SDK version (1.8.1) and bulk upload worked as expected again.