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Sliding sync: various fixes to background update (#17636)
Follows on from #17512, other fixes include: #17633, #17634, #17635
This commit is contained in:
Erik Johnston
GitHub
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ca69d0f571
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d52c17ce01
1
changelog.d/17636.misc
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1
changelog.d/17636.misc
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@ -0,0 +1 @@
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Pre-populate room data used in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint for quick filtering/sorting.
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@ -1861,7 +1861,7 @@ class PersistEventsStore:
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VALUES (
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?, ?, ?, ?, ?,
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(SELECT stream_ordering FROM events WHERE event_id = ?),
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(SELECT instance_name FROM events WHERE event_id = ?)
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(SELECT COALESCE(instance_name, 'master') FROM events WHERE event_id = ?)
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{("," + ", ".join("?" for _ in sliding_sync_snapshot_values)) if sliding_sync_snapshot_values else ""}
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)
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ON CONFLICT (room_id, user_id)
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@ -41,6 +41,7 @@ from synapse.storage.databases.main.events import (
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SlidingSyncMembershipSnapshotSharedInsertValues,
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SlidingSyncStateInsertValues,
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)
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from synapse.storage.databases.main.events_worker import DatabaseCorruptionError
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from synapse.storage.databases.main.state_deltas import StateDeltasStore
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from synapse.storage.databases.main.stream import StreamWorkerStore
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from synapse.storage.types import Cursor
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@ -1857,6 +1858,7 @@ class EventsBackgroundUpdatesStore(StreamWorkerStore, StateDeltasStore, SQLBaseS
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initial_phase = True
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last_room_id = progress.get("last_room_id", "")
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last_user_id = progress.get("last_user_id", "")
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last_event_stream_ordering = progress["last_event_stream_ordering"]
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def _find_memberships_to_update_txn(
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@ -1887,11 +1889,11 @@ class EventsBackgroundUpdatesStore(StreamWorkerStore, StateDeltasStore, SQLBaseS
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FROM local_current_membership AS c
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INNER JOIN events AS e USING (event_id)
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LEFT JOIN rooms AS r ON (c.room_id = r.room_id)
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WHERE c.room_id > ?
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ORDER BY c.room_id ASC
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WHERE (c.room_id, c.user_id) > (?, ?)
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ORDER BY c.room_id ASC, c.user_id ASC
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LIMIT ?
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""",
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(last_room_id, batch_size),
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(last_room_id, last_user_id, batch_size),
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)
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elif last_event_stream_ordering is not None:
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# It's important to sort by `event_stream_ordering` *ascending* (oldest to
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@ -1993,6 +1995,7 @@ class EventsBackgroundUpdatesStore(StreamWorkerStore, StateDeltasStore, SQLBaseS
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WHERE
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room_id = ?
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AND m.user_id = ?
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AND (m.membership = ? OR m.membership = ?)
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AND e.event_id != ?
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ORDER BY e.topological_ordering DESC
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LIMIT 1
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@ -2000,6 +2003,8 @@ class EventsBackgroundUpdatesStore(StreamWorkerStore, StateDeltasStore, SQLBaseS
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(
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room_id,
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user_id,
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Membership.INVITE,
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Membership.KNOCK,
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event_id,
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),
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)
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@ -2081,9 +2086,17 @@ class EventsBackgroundUpdatesStore(StreamWorkerStore, StateDeltasStore, SQLBaseS
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# have `current_state_events` and we should have some current state
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# for each room
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if current_state_ids_map:
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fetched_events = await self.get_events(
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current_state_ids_map.values()
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)
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try:
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fetched_events = await self.get_events(
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current_state_ids_map.values()
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)
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except DatabaseCorruptionError as e:
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logger.warning(
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"Failed to fetch state for room '%s' due to corrupted events. Ignoring. Error: %s",
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room_id,
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e,
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)
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continue
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current_state_map: StateMap[EventBase] = {
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state_key: fetched_events[event_id]
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@ -2124,7 +2137,7 @@ class EventsBackgroundUpdatesStore(StreamWorkerStore, StateDeltasStore, SQLBaseS
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False
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)
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elif membership in (Membership.INVITE, Membership.KNOCK) or (
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membership == Membership.LEAVE and is_outlier
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membership in (Membership.LEAVE, Membership.BAN) and is_outlier
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):
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invite_or_knock_event_id = membership_event_id
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invite_or_knock_membership = membership
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@ -2135,7 +2148,7 @@ class EventsBackgroundUpdatesStore(StreamWorkerStore, StateDeltasStore, SQLBaseS
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# us a consistent view of the room state regardless of your
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# membership (i.e. the room shouldn't disappear if your using the
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# `is_encrypted` filter and you leave).
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if membership == Membership.LEAVE and is_outlier:
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if membership in (Membership.LEAVE, Membership.BAN) and is_outlier:
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invite_or_knock_event_id, invite_or_knock_membership = (
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await self.db_pool.runInteraction(
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"sliding_sync_membership_snapshots_bg_update._find_previous_membership",
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@ -2182,7 +2195,15 @@ class EventsBackgroundUpdatesStore(StreamWorkerStore, StateDeltasStore, SQLBaseS
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await_full_state=False,
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)
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fetched_events = await self.get_events(state_ids_map.values())
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try:
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fetched_events = await self.get_events(state_ids_map.values())
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except DatabaseCorruptionError as e:
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logger.warning(
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"Failed to fetch state for room '%s' due to corrupted events. Ignoring. Error: %s",
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room_id,
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e,
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)
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continue
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state_map: StateMap[EventBase] = {
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state_key: fetched_events[event_id]
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@ -2296,7 +2317,7 @@ class EventsBackgroundUpdatesStore(StreamWorkerStore, StateDeltasStore, SQLBaseS
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(
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room_id,
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_room_id_from_rooms_table,
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_user_id,
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user_id,
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_sender,
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_membership_event_id,
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_membership,
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@ -2308,8 +2329,11 @@ class EventsBackgroundUpdatesStore(StreamWorkerStore, StateDeltasStore, SQLBaseS
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progress = {
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"initial_phase": initial_phase,
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"last_room_id": room_id,
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"last_event_stream_ordering": membership_event_stream_ordering,
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"last_user_id": user_id,
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"last_event_stream_ordering": last_event_stream_ordering,
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}
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if not initial_phase:
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progress["last_event_stream_ordering"] = membership_event_stream_ordering
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await self.db_pool.updates._background_update_progress(
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_BackgroundUpdates.SLIDING_SYNC_MEMBERSHIP_SNAPSHOTS_BG_UPDATE,
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@ -98,6 +98,26 @@ if TYPE_CHECKING:
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logger = logging.getLogger(__name__)
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class DatabaseCorruptionError(RuntimeError):
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"""We found an event in the DB that has a persisted event ID that doesn't
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match its computed event ID."""
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def __init__(
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self, room_id: str, persisted_event_id: str, computed_event_id: str
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) -> None:
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self.room_id = room_id
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self.persisted_event_id = persisted_event_id
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self.computed_event_id = computed_event_id
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message = (
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f"Database corruption: Event {persisted_event_id} in room {room_id} "
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f"from the database appears to have been modified (calculated "
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f"event id {computed_event_id})"
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)
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super().__init__(message)
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# These values are used in the `enqueue_event` and `_fetch_loop` methods to
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# control how we batch/bulk fetch events from the database.
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# The values are plucked out of thing air to make initial sync run faster
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@ -1364,10 +1384,8 @@ class EventsWorkerStore(SQLBaseStore):
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if original_ev.event_id != event_id:
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# it's difficult to see what to do here. Pretty much all bets are off
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# if Synapse cannot rely on the consistency of its database.
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raise RuntimeError(
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f"Database corruption: Event {event_id} in room {d['room_id']} "
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f"from the database appears to have been modified (calculated "
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f"event id {original_ev.event_id})"
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raise DatabaseCorruptionError(
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d["room_id"], event_id, original_ev.event_id
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)
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event_map[event_id] = original_ev
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