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-rw-r--r--synapse/replication/tcp/client.py19
-rw-r--r--synapse/replication/tcp/streams/_base.py12
2 files changed, 20 insertions, 11 deletions
diff --git a/synapse/replication/tcp/client.py b/synapse/replication/tcp/client.py
index 2d6d49eed7..3dddbb70b4 100644
--- a/synapse/replication/tcp/client.py
+++ b/synapse/replication/tcp/client.py
@@ -114,13 +114,19 @@ class ReplicationDataHandler:
         """
         all_room_ids: Set[str] = set()
         if stream_name == DeviceListsStream.NAME:
-            if any(row.entity.startswith("@") and not row.is_signature for row in rows):
+            if any(not row.is_signature and not row.hosts_calculated for row in rows):
                 prev_token = self.store.get_device_stream_token()
                 all_room_ids = await self.store.get_all_device_list_changes(
                     prev_token, token
                 )
                 self.store.device_lists_in_rooms_have_changed(all_room_ids, token)
 
+            # If we're sending federation we need to update the device lists
+            # outbound pokes stream change cache with updated hosts.
+            if self.send_handler and any(row.hosts_calculated for row in rows):
+                hosts = await self.store.get_destinations_for_device(token)
+                self.store.device_lists_outbound_pokes_have_changed(hosts, token)
+
         self.store.process_replication_rows(stream_name, instance_name, token, rows)
         # NOTE: this must be called after process_replication_rows to ensure any
         # cache invalidations are first handled before any stream ID advances.
@@ -433,12 +439,11 @@ class FederationSenderHandler:
             # The entities are either user IDs (starting with '@') whose devices
             # have changed, or remote servers that we need to tell about
             # changes.
-            hosts = {
-                row.entity
-                for row in rows
-                if not row.entity.startswith("@") and not row.is_signature
-            }
-            await self.federation_sender.send_device_messages(hosts, immediate=False)
+            if any(row.hosts_calculated for row in rows):
+                hosts = await self.store.get_destinations_for_device(token)
+                await self.federation_sender.send_device_messages(
+                    hosts, immediate=False
+                )
 
         elif stream_name == ToDeviceStream.NAME:
             # The to_device stream includes stuff to be pushed to both local
diff --git a/synapse/replication/tcp/streams/_base.py b/synapse/replication/tcp/streams/_base.py
index 661206c841..d021904de7 100644
--- a/synapse/replication/tcp/streams/_base.py
+++ b/synapse/replication/tcp/streams/_base.py
@@ -549,10 +549,14 @@ class DeviceListsStream(_StreamFromIdGen):
 
     @attr.s(slots=True, frozen=True, auto_attribs=True)
     class DeviceListsStreamRow:
-        entity: str
+        user_id: str
         # Indicates that a user has signed their own device with their user-signing key
         is_signature: bool
 
+        # Indicates if this is a notification that we've calculated the hosts we
+        # need to send the update to.
+        hosts_calculated: bool
+
     NAME = "device_lists"
     ROW_TYPE = DeviceListsStreamRow
 
@@ -594,13 +598,13 @@ class DeviceListsStream(_StreamFromIdGen):
             upper_limit_token = min(upper_limit_token, signatures_to_token)
 
         device_updates = [
-            (stream_id, (entity, False))
-            for stream_id, (entity,) in device_updates
+            (stream_id, (entity, False, hosts))
+            for stream_id, (entity, hosts) in device_updates
             if stream_id <= upper_limit_token
         ]
 
         signatures_updates = [
-            (stream_id, (entity, True))
+            (stream_id, (entity, True, False))
             for stream_id, (entity,) in signatures_updates
             if stream_id <= upper_limit_token
         ]