Merge branch 'develop' of https://github.com/matrix-org/synapse into cohort_analytics

1 files changed, 6 insertions, 3 deletions

diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py
index 8e2c0c4cd2..6163f7c466 100644
--- a/synapse/federation/federation_client.py
+++ b/synapse/federation/federation_client.py
@@ -19,6 +19,8 @@ import itertools
 import logging
 import random
 
+from six.moves import range
+
 from twisted.internet import defer
 
 from synapse.api.constants import Membership
@@ -33,7 +35,7 @@ from synapse.federation.federation_base import (
 import synapse.metrics
 from synapse.util import logcontext, unwrapFirstError
 from synapse.util.caches.expiringcache import ExpiringCache
-from synapse.util.logcontext import make_deferred_yieldable, preserve_fn
+from synapse.util.logcontext import make_deferred_yieldable, run_in_background
 from synapse.util.logutils import log_function
 from synapse.util.retryutils import NotRetryingDestination
 
@@ -413,11 +415,12 @@ class FederationClient(FederationBase):
 
         batch_size = 20
         missing_events = list(missing_events)
-        for i in xrange(0, len(missing_events), batch_size):
+        for i in range(0, len(missing_events), batch_size):
             batch = set(missing_events[i:i + batch_size])
 
             deferreds = [
-                preserve_fn(self.get_pdu)(
+                run_in_background(
+                    self.get_pdu,
                     destinations=random_server_list(),
                     event_id=e_id,
                 )