From 682b63312e711ea71bdad2e11e31871d9fbf75f6 Mon Sep 17 00:00:00 2001
From: Pieter Noordhuis <pcnoordhuis@gmail.com>
Date: Wed, 17 Aug 2011 18:15:06 +0200
Subject: [PATCH] Fix AOF race that may duplicate commands

---
 src/aof.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/aof.c b/src/aof.c
index a85aa005..0354592c 100644
--- a/src/aof.c
+++ b/src/aof.c
@@ -795,6 +795,11 @@ void backgroundRewriteDoneHandler(int statloc) {
             server.appendseldb = -1; /* Make sure SELECT is re-issued */
             aofUpdateCurrentSize();
             server.auto_aofrewrite_base_size = server.appendonly_current_size;
+
+            /* Clear regular AOF buffer since its contents was just written to
+             * the new AOF from the background rewrite buffer. */
+            sdsfree(server.aofbuf);
+            server.aofbuf = sdsempty();
         }
 
         redisLog(REDIS_NOTICE, "Background AOF rewrite successful");