From 28b001f897e3d3dfdffe1cca811657dd36961605 Mon Sep 17 00:00:00 2001
From: Maxim Dounin <mdounin@mdounin.ru>
Date: Sun, 25 Sep 2011 20:00:36 +0000
Subject: [PATCH] Upstream: clearing of u->peer.connection on close.

This fixes crashes observed with some 3rd party balancer modules.  Standard
balancer modules (round-robin and ip hash) explicitly set pc->connection
(aka u->peer.connection) to NULL and aren't affected.
---
 src/http/ngx_http_upstream.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/http/ngx_http_upstream.c b/src/http/ngx_http_upstream.c
index ef16a662c..3d022c78f 100644
--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -2927,6 +2927,7 @@ ngx_http_upstream_next(ngx_http_request_t *r, ngx_http_upstream_t *u,
         }
 
         ngx_close_connection(u->peer.connection);
+        u->peer.connection = NULL;
     }
 
 #if 0