Arvados

An error message occurs When trying to upload a 0 byte file to the keep server with 'arv keep put'.

For example:

$ touch zerobytefile
    $ arv keep put zerobytefile

Traceback (most recent call last):
      File "/usr/local/bin/arv-put", line 4, in <module>
        main()
      File "/usr/local/lib/python2.7/dist-packages/arvados/commands/put.py", line 394, in main
        'manifest_text': writer.manifest_text(),
      File "/usr/local/lib/python2.7/dist-packages/oauth2client/util.py", line 132, in positional_wrapper
        return wrapped(*args, **kwargs)
      File "/usr/local/lib/python2.7/dist-packages/apiclient/http.py", line 723, in execute
        raise HttpError(resp, content, uri=self.uri)
    apiclient.errors.HttpError: <HttpError 422 when requesting https://qr1hi.arvadosapi.com/arvados/v1/collections?alt=json returned "Unprocessable Entity">