Update the rejected state of events during resync (#13459)

Events can be un-rejected or newly-rejected during resync, so ensure we update
the database and caches when that happens.
This commit is contained in:
Richard van der Hoff 2022-08-11 11:42:24 +01:00 committed by GitHub
parent 2281427175
commit 507c1cb330
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4 changed files with 66 additions and 9 deletions

1
changelog.d/13459.misc Normal file
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@ -0,0 +1 @@
Faster joins: update the rejected state of events during de-partial-stating.

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@ -2200,3 +2200,63 @@ class EventsWorkerStore(SQLBaseStore):
(room_id,),
)
return [row[0] for row in txn]
def mark_event_rejected_txn(
self,
txn: LoggingTransaction,
event_id: str,
rejection_reason: Optional[str],
) -> None:
"""Mark an event that was previously accepted as rejected, or vice versa
This can happen, for example, when resyncing state during a faster join.
Args:
txn:
event_id: ID of event to update
rejection_reason: reason it has been rejected, or None if it is now accepted
"""
if rejection_reason is None:
logger.info(
"Marking previously-processed event %s as accepted",
event_id,
)
self.db_pool.simple_delete_txn(
txn,
"rejections",
keyvalues={"event_id": event_id},
)
else:
logger.info(
"Marking previously-processed event %s as rejected(%s)",
event_id,
rejection_reason,
)
self.db_pool.simple_upsert_txn(
txn,
table="rejections",
keyvalues={"event_id": event_id},
values={
"reason": rejection_reason,
"last_check": self._clock.time_msec(),
},
)
self.db_pool.simple_update_txn(
txn,
table="events",
keyvalues={"event_id": event_id},
updatevalues={"rejection_reason": rejection_reason},
)
self.invalidate_get_event_cache_after_txn(txn, event_id)
# TODO(faster_joins): invalidate the cache on workers. Ideally we'd just
# call '_send_invalidation_to_replication', but we actually need the other
# end to call _invalidate_local_get_event_cache() rather than (just)
# _get_event_cache.invalidate().
#
# One solution might be to (somehow) get the workers to call
# _invalidate_caches_for_event() (though that will invalidate more than
# strictly necessary).
#
# https://github.com/matrix-org/synapse/issues/12994

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@ -430,6 +430,11 @@ class StateGroupWorkerStore(EventsWorkerStore, SQLBaseStore):
updatevalues={"state_group": state_group},
)
# the event may now be rejected where it was not before, or vice versa,
# in which case we need to update the rejected flags.
if bool(context.rejected) != (event.rejected_reason is not None):
self.mark_event_rejected_txn(txn, event.event_id, context.rejected)
self.db_pool.simple_delete_one_txn(
txn,
table="partial_state_events",

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@ -539,15 +539,6 @@ class StateFilter:
is_mine_id: a callable which confirms if a given state_key matches a mxid
of a local user
"""
# TODO(faster_joins): it's not entirely clear that this is safe. In particular,
# there may be circumstances in which we return a piece of state that, once we
# resync the state, we discover is invalid. For example: if it turns out that
# the sender of a piece of state wasn't actually in the room, then clearly that
# state shouldn't have been returned.
# We should at least add some tests around this to see what happens.
# https://github.com/matrix-org/synapse/issues/13006
# if we haven't requested membership events, then it depends on the value of
# 'include_others'
if EventTypes.Member not in self.types: