From 39a3340f738f37868b7034cb019fb410f6b1d48b Mon Sep 17 00:00:00 2001
From: Erik Johnston <erik@matrix.org>
Date: Thu, 21 May 2015 15:48:56 +0100
Subject: [PATCH] Skip events we've already seen

---
 synapse/storage/event_federation.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/synapse/storage/event_federation.py b/synapse/storage/event_federation.py
index 91d19857b..823a4998c 100644
--- a/synapse/storage/event_federation.py
+++ b/synapse/storage/event_federation.py
@@ -411,6 +411,9 @@ class EventFederationStore(SQLBaseStore):
             except Empty:
                 break
 
+            if event_id in event_results:
+                continue
+
             event_results.add(event_id)
 
             txn.execute(