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[Matt Riedemann <mriedem.os@xxxxxxxxx>]

Adding nova since the oslo.serialization change breaks nova unit and
functional tests so I need to fix those up first.

** Changed in: oslo.serialization
       Status: New => Fix Released

** Also affects: nova
   Importance: Undecided
       Status: New

** Changed in: nova
       Status: New => In Progress

** Changed in: nova
     Assignee: (unassigned) => Matt Riedemann (mriedem)

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https://bugs.launchpad.net/bugs/1593641

Title:
  Strange errors when using dump/dumps from jsonutils

Status in OpenStack Compute (nova):
  In Progress
Status in oslo.serialization:
  Fix Released

Bug description:
  Methods dump/dumps throw strange exceptions (ValueError: Circular
  reference detected) when trying to serialize arbitrary (non-
  serializable) objects.

  For example,

  jsonutils.dumps(object())

  yields the following traceback:

  Traceback (most recent call last):
    File "/home/gdavoian/oslo.serialization/oslo_serialization/jsonutils.py", line 259, in <module>
      print dumps(object())
    File "/home/gdavoian/oslo.serialization/oslo_serialization/jsonutils.py", line 184, in dumps
      return json.dumps(obj, default=default, **kwargs)
    File "/usr/lib/python2.7/json/__init__.py", line 250, in dumps
      sort_keys=sort_keys, **kw).encode(obj)
    File "/usr/lib/python2.7/json/encoder.py", line 207, in encode
      chunks = self.iterencode(o, _one_shot=True)
    File "/usr/lib/python2.7/json/encoder.py", line 270, in iterencode
      return _iterencode(o, 0)
  ValueError: Circular reference detected

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