diff --git a/synapse/storage/databases/state/store.py b/synapse/storage/databases/state/store.py
index 7749426a87..afb7a52cf8 100644
--- a/synapse/storage/databases/state/store.py
+++ b/synapse/storage/databases/state/store.py
@@ -453,12 +453,22 @@ class StateGroupDataStore(StateBackgroundUpdateStore, SQLBaseStore):
)
log_ticker += 1
- validation_logger.info(
- "LT=%d. Correct: %r. Effective: %r",
- log_ticker,
- validation_counter,
- effectiveness_counter,
- )
+ if log_ticker % 20 == 0:
+ validation_logger.info(
+ "LT=%d. Correct: %r. Effective: %r",
+ log_ticker,
+ validation_counter,
+ effectiveness_counter,
+ )
+
+ if len(set(groups)) != len(groups):
+ try:
+ raise RuntimeError("Inefficient")
+ except RuntimeError:
+ validation_logger.exception(
+ "Warning (not of bug, but fishy): len(s(g)) != len(g). g=%r.",
+ groups,
+ )
return old_result
@@ -543,7 +553,7 @@ class StateGroupDataStore(StateBackgroundUpdateStore, SQLBaseStore):
# (member_state, incomplete_groups_m,) = self._get_state_for_groups_using_cache(
# groups, self._state_group_members_cache, state_filter=member_filter
# )
- state = dict()
+ state = {}
# state = dict(non_member_state)
# for group in groups:
# state[group].update(member_state[group])
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