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[Thomas Herve <1274523@xxxxxxxxxxxxxxxxxx>]

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https://bugs.launchpad.net/bugs/1274523

Title:
  connection_trace does not work with DB2 backend

Status in Cinder:
  Invalid
Status in Glance:
  Triaged
Status in neutron:
  Confirmed
Status in OpenStack Compute (nova):
  Fix Released
Status in oslo-incubator:
  Fix Released
Status in oslo.db:
  Fix Released

Bug description:
  When setting connection_trace=True, the stack trace does not get
  printed for DB2 (ibm_db).

  I have a patch that we've been using internally for this fix that I
  plan to upstream soon, and with that we can get output like this:

  2013-09-11 13:07:51.985 28151 INFO sqlalchemy.engine.base.Engine [-] SELECT services.created_at AS services_created_at, services.updated_at AS services_updated_at, services.deleted_at AS services_deleted_at, services.deleted AS services_deleted, services.id AS services_id, services.host AS services_host, services."binary" AS services_binary, services.topic AS services_topic, services.report_count AS services_report_count, services.disabled AS services_disabled, services.disabled_reason AS services_disabled_reason
  FROM services WHERE services.deleted = ? AND services.id = ? FETCH FIRST 1 ROWS ONLY
  2013-09-11 13:07:51,985 INFO sqlalchemy.engine.base.Engine (0, 3)
  2013-09-11 13:07:51.985 28151 INFO sqlalchemy.engine.base.Engine [-] (0, 3)
          File /usr/lib/python2.6/site-packages/nova/servicegroup/drivers/db.py:92 _report_state() service.service_ref, state_catalog)
          File /usr/lib/python2.6/site-packages/nova/conductor/api.py:270 service_update() return self._manager.service_update(context, service, values)
          File /usr/lib/python2.6/site-packages/nova/openstack/common/rpc/common.py:420 catch_client_exception() return func(*args, **kwargs)
          File /usr/lib/python2.6/site-packages/nova/conductor/manager.py:461 service_update() svc = self.db.service_update(context, service['id'], values)
          File /usr/lib/python2.6/site-packages/nova/db/sqlalchemy/api.py:505 service_update() with_compute_node=False, session=session)
          File /usr/lib/python2.6/site-packages/nova/db/sqlalchemy/api.py:388 _service_get() result = query.first()

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