Matthew Booth 4540cd6ef9 Fix retry of instance_update_and_get_original ... _instance_update modifies its 'values' argument. Consequently if it is retried due to an update conflict, the second invocation has the wrong arguments. A specific issue this causes is that if we called it with expected_task_state a concurrent modification to task_state will cause us to fail and retry. However, expected_task_state will have been popped from values on the first invocation and will not be present for the second. Consequently the second invocation will fail to perform the task_state check and therefore succeed, resulting in a race. We rewrite the old race unit test which wasn't testing the correct thing for 2 reasons: 1. Due to the bug fixed in this patch, although we were calling update_on_match() twice, the second call didn't check the task state. 2. side_effect=iterable returns function items without executing them, but we weren't hitting this due to the bug fixed in this patch. Closes-Bug: #1821373 Change-Id: I01c63e685113bf30e687ccb14a4d18e344b306f6 (cherry picked from commit aae5c7aa38) (cherry picked from commit 61fef49b15)		2019-05-20 11:57:01 +01:00
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sqlalchemy	Fix retry of instance_update_and_get_original	2019-05-20 11:57:01 +01:00
__init__.py	Use nova.db.api directly	2018-07-10 14:56:27 +00:00
api.py	Remove remaining legacy DB API instance_group* methods	2018-06-27 13:24:42 -04:00
base.py	Use nova.db.api directly	2018-07-10 14:56:27 +00:00
constants.py	Move db MAX constants to own file	2018-03-01 11:09:29 +00:00
migration.py	Manage db sync command for cell0	2016-08-22 18:53:45 +03:00