Error while executing std.http: Circular reference detected

[Nikolay Makhotkin]

Steps to reproduce:

1. Run action: mistral run-action std.http '{"url": "http://google.ru"}'

2. Get error:

ERROR (app) Circular reference detected
Traceback (most recent call last):

  File "/home/kolyan/projects/mistral/.tox/venv/local/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 142, in _dispatch_and_reply
    executor_callback))

  File "/home/kolyan/projects/mistral/.tox/venv/local/lib/python2.7/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 101, in reply
    self._send_reply(conn, reply, failure, log_failure=log_failure)

  File "/home/kolyan/projects/mistral/.tox/venv/local/lib/python2.7/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 73, in _send_reply
    conn.direct_send(self.reply_q, rpc_common.serialize_msg(msg))

  File "/home/kolyan/projects/mistral/.tox/venv/local/lib/python2.7/site-packages/oslo_messaging/_drivers/common.py", line 285, in serialize_msg
    _MESSAGE_KEY: jsonutils.dumps(raw_msg)}

  File "/home/kolyan/projects/mistral/.tox/venv/local/lib/python2.7/site-packages/oslo_serialization/jsonutils.py", line 185, 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

Traceback (most recent call last):

  File "/home/kolyan/projects/mistral/.tox/venv/local/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 142, in _dispatch_and_reply
    executor_callback))

  File "/home/kolyan/projects/mistral/.tox/venv/local/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 186, in _dispatch
    executor_callback)

  File "/home/kolyan/projects/mistral/.tox/venv/local/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 129, in _do_dispatch
    result = func(ctxt, **new_args)

  File "/home/kolyan/projects/mistral/mistral/engine/rpc.py", line 122, in start_action
    **params

  File "/home/kolyan/projects/mistral/mistral/utils/__init__.py", line 105, in _logged
    return func(*args, **kw)

  File "/home/kolyan/projects/mistral/mistral/engine/default_engine.py", line 127, in start_action
    async=False

  File "/home/kolyan/projects/mistral/mistral/engine/action_handler.py", line 150, in run_action
    async

  File "/home/kolyan/projects/mistral/mistral/engine/rpc.py", line 441, in run_action
    **kwargs

  File "/home/kolyan/projects/mistral/.tox/venv/local/lib/python2.7/site-packages/oslo_messaging/rpc/client.py", line 158, in call
    retry=self.retry)

  File "/home/kolyan/projects/mistral/.tox/venv/local/lib/python2.7/site-packages/oslo_messaging/transport.py", line 90, in _send
    timeout=timeout, retry=retry)

  File "/home/kolyan/projects/mistral/.tox/venv/local/lib/python2.7/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 431, in send
    retry=retry)

  File "/home/kolyan/projects/mistral/.tox/venv/local/lib/python2.7/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 422, in _send
    raise result

ValueError: Circular reference detected
Traceback (most recent call last):

  File "/home/kolyan/projects/mistral/.tox/venv/local/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 142, in _dispatch_and_reply
    executor_callback))

  File "/home/kolyan/projects/mistral/.tox/venv/local/lib/python2.7/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 101, in reply
    self._send_reply(conn, reply, failure, log_failure=log_failure)

  File "/home/kolyan/projects/mistral/.tox/venv/local/lib/python2.7/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 73, in _send_reply
    conn.direct_send(self.reply_q, rpc_common.serialize_msg(msg))

  File "/home/kolyan/projects/mistral/.tox/venv/local/lib/python2.7/site-packages/oslo_messaging/_drivers/common.py", line 285, in serialize_msg
    _MESSAGE_KEY: jsonutils.dumps(raw_msg)}

  File "/home/kolyan/projects/mistral/.tox/venv/local/lib/python2.7/site-packages/oslo_serialization/jsonutils.py", line 185, 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

The same error is received if action is called via workflow.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/204558

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/204558
Committed: https://git.openstack.org/cgit/openstack/mistral/commit/?id=1db5ff44060a472902ad9c19169d3986de7fc687
Submitter: Jenkins
Branch: master

commit 1db5ff44060a472902ad9c19169d3986de7fc687
Author: Nikolay Mahotkin <email address hidden>
Date: Wed Jul 22 14:16:59 2015 +0300

    Fixing std.http action

     * The problem comes from JSON serializing. Cookies and
       datetime is not JSON serializable, so we need to
       preprocess them manually.

    Closes-Bug: #1477048

    Change-Id: I2dbd1463f1b3549f661c0dba46ab6f949c4fffb4