Comment 0 for bug 1501838

Possible issue with the Snapshot object?

master @ 7f498b0 Merge "Obtain target authentication from database same as LIO target"

Running this tox env (subset of our full tests):

[testenv:py34not]
commands = ostestr {posargs} --concurrency=16 --regex (cinder.tests.unit.test_volume|cinder.tests.unit.image.test_cache)

cinder.tests.unit.test_volume.GetActiveByWindowTestCase.test_snapshot_get_active_by_window
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Captured traceback:
~~~~~~~~~~~~~~~~~~~
    Traceback (most recent call last):
      File "cinder/tests/unit/test_volume.py", line 5982, in test_snapshot_get_active_by_window
        datetime.datetime(1, 4, 1, 1, 1, 1)).objects
      File "/home/eharney/src/cinder-trunk8/.tox/py34not/lib/python2.7/site-packages/oslo_versionedobjects/base.py", line 171, in wrapper
        result = fn(cls, context, *args, **kwargs)
      File "cinder/objects/snapshot.py", line 251, in get_active_by_window
        snapshots, expected_attrs=['metadata'])
      File "/home/eharney/src/cinder-trunk8/.tox/py34not/lib/python2.7/site-packages/oslo_versionedobjects/base.py", line 991, in obj_make_list
        **extra_args)
      File "cinder/objects/snapshot.py", line 121, in _from_db_object
        metadata = db_snapshot.get('snapshot_metadata')
      File "/home/eharney/src/cinder-trunk8/.tox/py34not/lib/python2.7/site-packages/oslo_db/sqlalchemy/models.py", line 68, in get
        return getattr(self, key, default)
      File "/home/eharney/src/cinder-trunk8/.tox/py34not/lib/python2.7/site-packages/sqlalchemy/orm/attributes.py", line 237, in __get__
        return self.impl.get(instance_state(instance), dict_)
      File "/home/eharney/src/cinder-trunk8/.tox/py34not/lib/python2.7/site-packages/sqlalchemy/orm/attributes.py", line 578, in get
        value = self.callable_(state, passive)
      File "/home/eharney/src/cinder-trunk8/.tox/py34not/lib/python2.7/site-packages/sqlalchemy/orm/strategies.py", line 502, in _load_for_state
        (orm_util.state_str(state), self.key)
    sqlalchemy.orm.exc.DetachedInstanceError: Parent instance <Snapshot at 0x7f38f90ae790> is not bound to a Session; lazy load operation of attribute 'snapshot_metadata' cannot proceed