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state, we\nexpect the current task state to be None and do not handle any\nUnexpectedTaskStateError exceptions that the database layer may throw\nat us. In those cases, we return an error 500 to the user, when in\nactuality an error 409 conflict would be more appropriate. This\npatch makes the API layer handle UnexpectedTaskStateError exceptions\nand return a 409 to the user.\n\nNOTE(artom) Conflict in imports in\nnova/tests/unit/api/openstack/compute/test_shelve.py due to using\noslo\u0027s uuidsentinel as of 8e1ca5bf34f924b9a23ddbcf31ae727a7dcacb20 in\nstein.\n\nCloses-bug: 1850694\nChange-Id: Ie0b421cd5d3a5781c1dd09fab4ed013ece0f939d\n(cherry picked from commit a423d8b27785623550f401a200b68ca926c0a119)\n(cherry picked from commit 32dbd2f585ef1902478170f3a1153b1f71e81db3)\n(cherry picked from commit 8ee59604dcd9f770286f54e3a39c80f54413c358)\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/nova/commit/a90fe1951200ebd27fe74788c0a96c01104ac2cf"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/nova/commit/a90fe1951200ebd27fe74788c0a96c01104ac2cf"}]},"branch":"refs/heads/stable/rocky"}},"requirements":[],"submit_records":[],"submit_requirements":[]}