From 963002d71e64ffd1491b398eea3f57a34d928464 Mon Sep 17 00:00:00 2001
From: "zhaozhao.zz" <zhaozhao.zz@alibaba-inc.com>
Date: Wed, 13 Jun 2018 20:35:40 +0800
Subject: [PATCH] optimize reply list memory usage

---
 src/networking.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/networking.c b/src/networking.c
index 00558974..02e77307 100644
--- a/src/networking.c
+++ b/src/networking.c
@@ -247,7 +247,7 @@ void _addReplyStringToList(client *c, const char *s, size_t len) {
 
         /* Append to this object when possible. If tail == NULL it was
          * set via addDeferredMultiBulkLength(). */
-        if (tail && sdslen(tail)+len <= PROTO_REPLY_CHUNK_BYTES) {
+        if (tail && (sdsavail(tail) >= len || sdslen(tail)+len <= PROTO_REPLY_CHUNK_BYTES)) {
             tail = sdscatlen(tail,s,len);
             listNodeValue(ln) = tail;
             c->reply_bytes += len;