Faster room joins: make `/joined_members` block whilst the room is partial stated. (#13514)

1 files changed, 3 insertions, 0 deletions

diff --git a/synapse/storage/databases/main/roommember.py b/synapse/storage/databases/main/roommember.py

index 93ff4816c8..5e5f607a14 100644
--- a/synapse/storage/databases/main/roommember.py
+++ b/synapse/storage/databases/main/roommember.py
@@ -283,6 +283,9 @@ class RoomMemberWorkerStore(EventsWorkerStore):
 
         Returns:
             A mapping from user ID to ProfileInfo.
+
+        Preconditions:
+          - There is full state available for the room (it is not partial-stated).
         """
 
         def _get_users_in_room_with_profiles(