diff options
| -rw-r--r-- | changelog.d/9537.bugfix | 1 | ||||
| -rw-r--r-- | synapse/storage/databases/main/events_bg_updates.py | 4 |
2 files changed, 4 insertions, 1 deletions
diff --git a/changelog.d/9537.bugfix b/changelog.d/9537.bugfix new file mode 100644 index 0000000000..033ab1c939 --- /dev/null +++ b/changelog.d/9537.bugfix @@ -0,0 +1 @@ +Fix rare edge case that caused a background update to fail if the server had rejected an event that had duplicate auth events. diff --git a/synapse/storage/databases/main/events_bg_updates.py b/synapse/storage/databases/main/events_bg_updates.py index c1626ccf28..cb6b1f8a0c 100644 --- a/synapse/storage/databases/main/events_bg_updates.py +++ b/synapse/storage/databases/main/events_bg_updates.py @@ -696,7 +696,9 @@ class EventsBackgroundUpdatesStore(SQLBaseStore): ) if not has_event_auth: - for auth_id in event.auth_event_ids(): + # Old, dodgy, events may have duplicate auth events, which we + # need to deduplicate as we have a unique constraint. + for auth_id in set(event.auth_event_ids()): auth_events.append( { "room_id": event.room_id, |