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[Balazs Gibizer <balazs.gibizer@xxxxxxxxxxxx>]

I think the fault is originated from nova and cannot really be dealt
with in oslo.messaging hence I'm setting the bug on oslo.messaging as
invalid

** Changed in: oslo.messaging
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1673375

Title:
  "ValueError: Circular reference detected" in send_notification

Status in OpenStack Compute (nova):
  Fix Released
Status in oslo.messaging:
  Invalid

Bug description:
  I guess something is wrong with nova, causing a tempest failure.

  http://logs.openstack.org/08/445308/3/check/gate-tempest-dsvm-py35
  -ubuntu-
  xenial/7bf0d72/logs/screen-n-api.txt.gz#_2017-03-16_05_31_09_399

  
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging Traceback (most recent call last):
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging   File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/engine/base.py", line 1139, in _execute_context
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging     context)
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging   File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/engine/default.py", line 450, in do_execute
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging     cursor.execute(statement, parameters)
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging   File "/usr/local/lib/python3.5/dist-packages/pymysql/cursors.py", line 166, in execute
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging     result = self._query(query)
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging   File "/usr/local/lib/python3.5/dist-packages/pymysql/cursors.py", line 322, in _query
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging     conn.query(q)
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging   File "/usr/local/lib/python3.5/dist-packages/pymysql/connections.py", line 852, in query
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging     self._affected_rows = self._read_query_result(unbuffered=unbuffered)
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging   File "/usr/local/lib/python3.5/dist-packages/pymysql/connections.py", line 1053, in _read_query_result
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging     result.read()
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging   File "/usr/local/lib/python3.5/dist-packages/pymysql/connections.py", line 1336, in read
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging     first_packet = self.connection._read_packet()
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging   File "/usr/local/lib/python3.5/dist-packages/pymysql/connections.py", line 1010, in _read_packet
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging     packet.check_error()
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging   File "/usr/local/lib/python3.5/dist-packages/pymysql/connections.py", line 393, in check_error
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging     err.raise_mysql_exception(self._data)
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging   File "/usr/local/lib/python3.5/dist-packages/pymysql/err.py", line 107, in raise_mysql_exception
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging     raise errorclass(errno, errval)
  2017-03-16 05:31:09.399 23355 ERROR oslo_messaging.notify.messaging pymysql.err.IntegrityError: (1062, "Duplicate entry 'ubuntu-xenial-rax-iad-7906449-6' for key 'uniq_aggregate_hosts0host0aggregate_id'")

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