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[Bug 1257168] Re: Cells: Error unlocking instances

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Russell Bryant <1257168@xxxxxxxxxxxxxxxxxx>
Date: Wed, 23 Jul 2014 15:06:10 -0000
Reply-to: Bug 1257168 <1257168@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
** Changed in: nova
       Status: Fix Committed => Fix Released

** Changed in: nova
    Milestone: None => juno-2

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https://bugs.launchpad.net/bugs/1257168

Title:
  Cells: Error unlocking instances

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  Getting the following error when trying to unlock an instance

  2013-12-03 15:14:31.198 31688 DEBUG nova.compute.api [req-266c1f02-b77c-440a-8983-948f6ab2357c 671dcaba8087487c8a28afe42b6672fa e4eee8dbc16a49dcbc76edac96674e96] [instance: fb468a1d-2e64-4560-850d-31a5fd698305] Unlocking unlock /usr/lib/python2.7/dist-packages/nova/compute/api.py:2612
  2013-12-03 15:14:31.200 31688 ERROR nova.cells.messaging [req-266c1f02-b77c-440a-8983-948f6ab2357c 671dcaba8087487c8a28afe42b6672fa e4eee8dbc16a49dcbc76edac96674e96] Error processing message locally: Object '<Instance at 0x5948a90>' is already attached to session '1247' (this is '1248')
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging Traceback (most recent call last):
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging File "/usr/lib/python2.7/dist-packages/nova/cells/messaging.py", line 205, in _process_locally
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging resp_value = self.msg_runner._process_message_locally(self)
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging File "/usr/lib/python2.7/dist-packages/nova/cells/messaging.py", line 1476, in _process_message_locally
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging return fn(message, **message.method_kwargs)
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging File "/usr/lib/python2.7/dist-packages/nova/cells/messaging.py", line 708, in run_compute_api_method
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging return self._run_api_method(message, method_info, fn)
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging File "/usr/lib/python2.7/dist-packages/nova/cells/messaging.py", line 702, in _run_api_method
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging return fn(message.ctxt, *args, **method_info['method_kwargs'])
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 198, in wrapped
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging return func(self, context, target, *args, **kwargs)
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 2615, in unlock
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging instance.save()
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging File "/usr/lib/python2.7/dist-packages/nova/openstack/common/db/sqlalchemy/models.py", line 52, in save
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging session.add(self)
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 1399, in add
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging self._save_or_update_state(state)
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 1411, in _save_or_update_state
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging self._save_or_update_impl(state)
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 1667, in _save_or_update_impl
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging self._update_impl(state)
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 1661, in _update_impl
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging self._attach(state)
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 1749, in _attach
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging state.session_id, self.hash_key))
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging InvalidRequestError: Object '<Instance at 0x5948a90>' is already attached to session '1247' (this is '1248')
  2013-12-03 15:14:31.200 31688 TRACE nova.cells.messaging

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