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-rw-r--r--synapse/handlers/federation.py34
-rw-r--r--synapse/handlers/room_member.py23
2 files changed, 23 insertions, 34 deletions
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
index 2d9126dd86..52be5a402d 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -1090,19 +1090,13 @@ class FederationHandler(BaseHandler):
 
     @defer.inlineCallbacks
     def do_remotely_reject_invite(self, target_hosts, room_id, user_id):
-        try:
-            origin, event = yield self._make_and_verify_event(
-                target_hosts,
-                room_id,
-                user_id,
-                "leave"
-            )
-            event = self._sign_event(event)
-        except SynapseError:
-            raise
-        except CodeMessageException as e:
-            logger.warn("Failed to reject invite: %s", e)
-            raise SynapseError(500, "Failed to reject invite")
+        origin, event = yield self._make_and_verify_event(
+            target_hosts,
+            room_id,
+            user_id,
+            "leave"
+        )
+        event = self._sign_event(event)
 
         # Try the host that we succesfully called /make_leave/ on first for
         # the /send_leave/ request.
@@ -1112,16 +1106,10 @@ class FederationHandler(BaseHandler):
         except ValueError:
             pass
 
-        try:
-            yield self.replication_layer.send_leave(
-                target_hosts,
-                event
-            )
-        except SynapseError:
-            raise
-        except CodeMessageException as e:
-            logger.warn("Failed to reject invite: %s", e)
-            raise SynapseError(500, "Failed to reject invite")
+        yield self.replication_layer.send_leave(
+            target_hosts,
+            event
+        )
 
         context = yield self.state_handler.compute_event_context(event)
 
diff --git a/synapse/handlers/room_member.py b/synapse/handlers/room_member.py
index 2052d6d05f..28b2c80a93 100644
--- a/synapse/handlers/room_member.py
+++ b/synapse/handlers/room_member.py
@@ -139,13 +139,6 @@ class RoomMemberHandler(BaseHandler):
         )
         yield user_joined_room(self.distributor, user, room_id)
 
-    def reject_remote_invite(self, user_id, room_id, remote_room_hosts):
-        return self.hs.get_handlers().federation_handler.do_remotely_reject_invite(
-            remote_room_hosts,
-            room_id,
-            user_id
-        )
-
     @defer.inlineCallbacks
     def update_membership(
             self,
@@ -286,13 +279,21 @@ class RoomMemberHandler(BaseHandler):
                 else:
                     # send the rejection to the inviter's HS.
                     remote_room_hosts = remote_room_hosts + [inviter.domain]
-
+                    fed_handler = self.hs.get_handlers().federation_handler
                     try:
-                        ret = yield self.reject_remote_invite(
-                            target.to_string(), room_id, remote_room_hosts
+                        ret = yield fed_handler.do_remotely_reject_invite(
+                            remote_room_hosts,
+                            room_id,
+                            target.to_string(),
                         )
                         defer.returnValue(ret)
-                    except SynapseError as e:
+                    except Exception as e:
+                        # if we were unable to reject the exception, just mark
+                        # it as rejected on our end and plough ahead.
+                        #
+                        # The 'except' clause is very broad, but we need to
+                        # capture everything from DNS failures upwards
+                        #
                         logger.warn("Failed to reject invite: %s", e)
 
                         yield self.store.locally_reject_invite(