Fix get_un_partial_stated_rooms_token to take instance_name

Author: erikjohnston

synapse/replication/tcp/streams/partial_state.py

@@ -43,7 +43,7 @@ def __init__(self, hs: "HomeServer"):
         super().__init__(
             hs.get_instance_name(),
             # TODO(faster_joins, multiple writers): we need to account for instance names
-            current_token_without_instance(store.get_un_partial_stated_rooms_token),
+            store.get_un_partial_stated_rooms_token,
             store.get_un_partial_stated_rooms_from_stream,
         )
 

synapse/storage/databases/main/room.py

@@ -1277,13 +1277,10 @@ async def get_join_event_id_and_device_lists_stream_id_for_partial_state(
         )
         return result["join_event_id"], result["device_lists_stream_id"]
 
-    def get_un_partial_stated_rooms_token(self) -> int:
-        # TODO(faster_joins, multiple writers): This is inappropriate if there
-        #     are multiple writers because workers that don't write often will
-        #     hold all readers up.
-        #     (See `MultiWriterIdGenerator.get_persisted_upto_position` for an
-        #      explanation.)
-        return self._un_partial_stated_rooms_stream_id_gen.get_current_token()
+    def get_un_partial_stated_rooms_token(self, instance_name: str) -> int:
+        return self._un_partial_stated_rooms_stream_id_gen.get_current_token(
+            instance_name
+        )
 
     async def get_un_partial_stated_rooms_from_stream(
         self, instance_name: str, last_id: int, current_id: int, limit: int