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Handle logical slots invalidation on a standby (#3097)

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Since PG16 logical replication slots on a standby can be invalidated due
to horizon. In this case, pg_replication_slot_advance() will fail with
ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE. We should force slot copy
(i.e., recreation) of such slots.
This commit is contained in:
Polina Bungina
2024-07-10 09:28:24 +02:00
committed by GitHub
parent f00826d6e6
commit 622d41c83c
2 changed files with 7 additions and 4 deletions
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tests/test_slots.py
+5 -3
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@@ -269,9 +269,11 @@ class TestSlotsHandler(BaseTestPostgresql):
def test_slots_advance_thread(self):
with patch.object(MockCursor, 'execute', Mock(side_effect=psycopg.OperationalError)), \
patch.object(psycopg.OperationalError, 'diag') as mock_diag:
type(mock_diag).sqlstate = PropertyMock(return_value='58P01')
self.s.schedule_advance_slots({'foo': {'bar': 100}})
self.s._advance.sync_slots()
for err in ('58P01', '55000'):
type(mock_diag).sqlstate = PropertyMock(return_value=err)
self.s.schedule_advance_slots({'foo': {'bar': 100}})
self.s._advance.sync_slots()
self.assertEqual(self.s._advance._copy_slots, ["bar"])
with patch.object(SlotsAdvanceThread, 'sync_slots', Mock(side_effect=Exception)):
self.s._advance._condition.wait = Mock()