** Project changed: nova-solver-scheduler => nova
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https://bugs.launchpad.net/bugs/1456871
Title:
objects.InstanceList.get_all(context, ['metadata','system_metadata'])
return error can't locate strategy for %s %s" % (cls, key)
Status in OpenStack Compute (Nova):
New
Bug description:
In our code we invoke the code as following:
objects.InstanceList.get_all(context, ['metadata','system_metadata'])
It throw the error said:
2015-05-19 21:52:31.222 22676 TRACE nova.scheduler.ibm.ego.ego_manager
strat = self._get_strategy(loader.strategy)
2015-05-19 21:52:31.222 22676 TRACE nova.scheduler.ibm.ego.ego_manager File
"/usr/lib64/python2.7/site-packages/sqlalchemy/orm/interfaces.py", line 452, in
_get_strategy
2015-05-19 21:52:31.222 22676 TRACE nova.scheduler.ibm.ego.ego_manager
cls = self._strategy_lookup(*key)
2015-05-19 21:52:31.222 22676 TRACE nova.scheduler.ibm.ego.ego_manager File
"/usr/lib64/python2.7/site-packages/sqlalchemy/orm/interfaces.py", line 507, in
_strategy_lookup
2015-05-19 21:52:31.222 22676 TRACE nova.scheduler.ibm.ego.ego_manager
raise Exception("can't locate strategy for %s %s" % (cls, key))
2015-05-19 21:52:31.222 22676 TRACE nova.scheduler.ibm.ego.ego_manager
Exception: can't locate strategy for <class
'sqlalchemy.orm.properties.ColumnProperty'> (('lazy', 'joined'),)
2015-05-19 21:52:31.222 22676 TRACE nova.scheduler.ibm.ego.ego_manager
The original used: db.instance_get_all(context,
['metadata','system_metadata']) can worked well.
Did some investigation and found the nova/objects/instance.py
function _expected_cols(expected_attrs):
will return list ['metadata','system_metadata', 'extra',
'extra.flavor'], then in the db query it throw the error: can't locate
strategy for <class 'sqlalchemy.orm.properties.ColumnProperty'>
(('lazy', 'joined'),)
Could anyone can help have a look? Thanks!
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