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Try to spot state deletions when they happen (#2489)

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Neil Alexander 2022-05-25 16:40:31 +01:00 • committed by GitHub
parent ff53398635
commit 6940c7c7dd
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4 changed files with 12 additions and 16 deletions
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19
roomserver/internal/input/input_latest_events.go
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@ -27,6 +27,7 @@ import (
"github.com/matrix-org/dendrite/roomserver/types"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/util"
"github.com/sirupsen/logrus"
)
// updateLatestEvents updates the list of latest events for this room in the database and writes the
@ -258,13 +259,6 @@ func (u *latestEventsUpdater) latestState() error {
return fmt.Errorf("roomState.CalculateAndStoreStateAfterEvents: %w", err)
}
// If we are overwriting the state then we should make sure that we
// don't send anything out over federation again, it will very likely
// be a repeat.
if u.stateAtEvent.Overwrite {
u.sendAsServer = ""
}
// Now that we have a new state snapshot based on the latest events,
// we can compare that new snapshot to the previous one and see what
// has changed. This gives us one list of removed state events and
@ -277,6 +271,17 @@ func (u *latestEventsUpdater) latestState() error {
return fmt.Errorf("roomState.DifferenceBetweenStateSnapshots: %w", err)
}
if removed := len(u.removed) - len(u.added); removed > 0 {
logrus.WithFields(logrus.Fields{
"event_id": u.event.EventID(),
"room_id": u.event.RoomID(),
"old_state_nid": u.oldStateNID,
"new_state_nid": u.newStateNID,
"old_latest": u.oldLatest,
"new_latest": u.latest,
}).Errorf("Unexpected state deletion (removing %d events)", removed)
}
// Also work out the state before the event removes and the event
// adds.
u.stateBeforeEventRemoves, u.stateBeforeEventAdds, err = roomState.DifferenceBetweeenStateSnapshots(