I'm trying on FC24, using python-ovirt-engine-sdk4-4.1.0-0.0.20161003git056315d.fc24.x86_64 to add a DC, and failing - against master. The client is unhappy:

File "/home/ykaul/ovirt-system-tests/basic-suite-master/test-scenarios/002_bootstrap.py", line 98, in add_dc4

    version=sdk4.types.Version(major=DC_VER_MAJ,minor=DC_VER_MIN),

  File "/usr/lib64/python2.7/site-packages/ovirtsdk4/services.py", line 4347, in add

    response = self._connection.send(request)

  File "/usr/lib64/python2.7/site-packages/ovirtsdk4/__init__.py", line 276, in send

    return self.__send(request)

  File "/usr/lib64/python2.7/site-packages/ovirtsdk4/__init__.py", line 298, in __send

    self._sso_token = self._get_access_token()

  File "/usr/lib64/python2.7/site-packages/ovirtsdk4/__init__.py", line 460, in _get_access_token

    sso_response = self._get_sso_response(self._sso_url, post_data)

  File "/usr/lib64/python2.7/site-packages/ovirtsdk4/__init__.py", line 498, in _get_sso_response

    return json.loads(body_buf.getvalue().decode('utf-8'))

  File "/usr/lib64/python2.7/json/__init__.py", line 339, in loads

    return _default_decoder.decode(s)

  File "/usr/lib64/python2.7/json/decoder.py", line 364, in decode

    obj, end = self.raw_decode(s, idx=_w(s, 0).end())

  File "/usr/lib64/python2.7/json/decoder.py", line 382, in raw_decode

    raise ValueError("No JSON object could be decoded")

ValueError: No JSON object could be decoded

Surprisingly, I now can't find that RPM of this SDK in resources.ovirt.org now.

I've tried with http://resources.ovirt.org/pub/ovirt-master-snapshot/rpm/fc24/x86_64/python-ovirt-engine-sdk4-4.0.0-0.1.20161004gitf94eeb5.fc24.x86_64.rpm 

- same result.

Did not see anything obvious on server or engine logs.

The code:

def add_dc4(api):

    nt.assert_true(api != None)

    dcs_service = api.system_service().data_centers_service()

    nt.assert_true(

        dc = dcs_service.add(

            sdk4.types.DataCenter(

                name=DC_NAME4,

                description='APIv4 DC',

                local=False,

                version=sdk4.types.Version(major=DC_VER_MAJ,minor=DC_VER_MIN),

            ),

        )

    )

And the api object is from:

            return sdk4.Connection(

                url=url,

                username=constants.ENGINE_USER,

                password=str(self.metadata['ovirt-engine-password']),

                insecure=True,

                debug=True,

            )