** Changed in: neutron
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1308489
Title:
Wrong issubclass() hook behavior in PluginInterface
Status in OpenStack Neutron (virtual network service):
Fix Released
Bug description:
Currently, PluginInterface provides an issubclass() hook that returns True
for issubclass(A, B) call, if all abstract methods of A (stored in
A.__abstractmethods__) can be found in the B.__mro__ tuple of classes. But
there is an edge case, when A doesn't have any abstract methods, which leads
to issubclass(A, B) call returning True even if A and B are not related all.
E.g. issubclass(NeutronPluginPLUMgridV2, NsxPlugin) returns True, while these
two are different core plugins. And it gets even more trickier when
superclasses are involved: e.g. SecurityGroupDbMixin is a superclass of
NsxPlugin, so depending on the fact whether the python module with NsxPlugin
class is imported or not, issubclass(NeutronPluginPLUMgridV2,
SecurityGroupDbMixin) will return either False or True accordingly.
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