diff options
| -rw-r--r-- | changelog.d/5221.bugfix | 1 | ||||
| -rw-r--r-- | synapse/storage/stream.py | 12 |
2 files changed, 12 insertions, 1 deletions
diff --git a/changelog.d/5221.bugfix b/changelog.d/5221.bugfix new file mode 100644 index 0000000000..03aa363d15 --- /dev/null +++ b/changelog.d/5221.bugfix @@ -0,0 +1 @@ +Fix race when backfilling in rooms with worker mode. diff --git a/synapse/storage/stream.py b/synapse/storage/stream.py index 529ad4ea79..6f7f65d96b 100644 --- a/synapse/storage/stream.py +++ b/synapse/storage/stream.py @@ -592,8 +592,18 @@ class StreamWorkerStore(EventsWorkerStore, SQLBaseStore): ) def get_max_topological_token(self, room_id, stream_key): + """Get the max topological token in a room before the given stream + ordering. + + Args: + room_id (str) + stream_key (int) + + Returns: + Deferred[int] + """ sql = ( - "SELECT max(topological_ordering) FROM events" + "SELECT coalesce(max(topological_ordering), 0) FROM events" " WHERE room_id = ? AND stream_ordering < ?" ) return self._execute( |