Prevent multiple device list updates from breaking a batch send (#5156)

fixes #5153 

1 files changed, 3 insertions, 2 deletions

diff --git a/synapse/federation/sender/per_destination_queue.py b/synapse/federation/sender/per_destination_queue.py

index fae8bea392..564c57203d 100644
--- a/synapse/federation/sender/per_destination_queue.py
+++ b/synapse/federation/sender/per_destination_queue.py
@@ -349,9 +349,10 @@ class PerDestinationQueue(object):
     @defer.inlineCallbacks
     def _get_new_device_messages(self, limit):
         last_device_list = self._last_device_list_stream_id
-        # Will return at most 20 entries
+
+        # Retrieve list of new device updates to send to the destination
         now_stream_id, results = yield self._store.get_devices_by_remote(
-            self._destination, last_device_list
+            self._destination, last_device_list, limit=limit,
         )
         edus = [
             Edu(