lbaas driver operations fail

Failed with following Error

ERROR networking_odl.journal.journal ^[[01;35m^[[00mTraceback (most recent call last):
ERROR networking_odl.journal.journal ^[[01;35m^[[00m File "/opt/stack/networking-odl/networking_odl/journal/journal.py", line 245, in _sync_entry
ERROR networking_odl.journal.journal ^[[01;35m^[[00m self.client.sendjson(method, urlpath, to_send)
ERROR networking_odl.journal.journal ^[[01;35m^[[00m File "/opt/stack/networking-odl/networking_odl/common/client.py", line 95, in sendjson
ERROR networking_odl.journal.journal ^[[01;35m^[[00m data = jsonutils.dumps(obj, indent=2) if obj else None
ERROR networking_odl.journal.journal ^[[01;35m^[[00m File "/usr/local/lib/python2.7/dist-packages/oslo_serialization/jsonutils.py", line 190, in dumps
ERROR networking_odl.journal.journal ^[[01;35m^[[00m return json.dumps(obj, default=default, **kwargs)
ERROR networking_odl.journal.journal ^[[01;35m^[[00m File "/usr/lib/python2.7/json/__init__.py", line 251, in dumps
ERROR networking_odl.journal.journal ^[[01;35m^[[00m sort_keys=sort_keys, **kw).encode(obj)
ERROR networking_odl.journal.journal ^[[01;35m^[[00m File "/usr/lib/python2.7/json/encoder.py", line 209, in encode
ERROR networking_odl.journal.journal ^[[01;35m^[[00m chunks = list(chunks)
ERROR networking_odl.journal.journal ^[[01;35m^[[00m File "/usr/lib/python2.7/json/encoder.py", line 434, in _iterencode
ERROR networking_odl.journal.journal ^[[01;35m^[[00m for chunk in _iterencode_dict(o, _current_indent_level):
ERROR networking_odl.journal.journal ^[[01;35m^[[00m File "/usr/lib/python2.7/json/encoder.py", line 408, in _iterencode_dict
ERROR networking_odl.journal.journal ^[[01;35m^[[00m for chunk in chunks:
ERROR networking_odl.journal.journal ^[[01;35m^[[00m File "/usr/lib/python2.7/json/encoder.py", line 443, in _iterencode
ERROR networking_odl.journal.journal ^[[01;35m^[[00m for chunk in _iterencode(o, _current_indent_level):
ERROR networking_odl.journal.journal ^[[01;35m^[[00m File "/usr/lib/python2.7/json/encoder.py", line 440, in _iterencode
ERROR networking_odl.journal.journal ^[[01;35m^[[00m raise ValueError("Circular reference detected")
ERROR networking_odl.journal.journal ^[[01;35m^[[00mValueError: Circular reference detected
ERROR networking_odl.journal.journal ^[[01;35m^[[00m