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Message #84325
[Bug 1817633] Re: Listing placement usages causes a circular reference error
** Changed in: nova
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1817633
Title:
Listing placement usages causes a circular reference error
Status in OpenStack Compute (nova):
Fix Released
Bug description:
With the removal of oslo versioned objects from from the Usage and
UsageList classes, serializing usages can result in a ValueError:
Circular reference detected because there is a decimal.Decimal in the
data to be returned.
This is a result of a func.sum used in the query to get lists of
aggregates.
Note that the creation of a Decimal does not happen with sqlite, so
the problem is not revealed by the functional gabbi tests. It happened
to show up in the pending gabbi-based integration tests
https://review.openstack.org/#/c/601614/ . See:
http://logs.openstack.org/08/607508/14/check/placement-gabbi-
tempest/f7c3eca/controller/logs/screen-placement-
api.txt.gz#_Feb_25_22_37_31_423135 for an example.
This can be fixed by casting the 'used' value to an int when creating
a Usage.
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References