[nginx] Upstream: avoided directly terminating the connection.

[Maxim Dounin]

details:   http://hg.nginx.org/nginx/rev/54e9b83d00f0
branches:  
changeset: 5827:54e9b83d00f0
user:      FengGu <flygoast at 126.com>
date:      Wed Aug 13 14:53:55 2014 +0800
description:
Upstream: avoided directly terminating the connection.

When memory allocation failed in ngx_http_upstream_cache(), the connection
would be terminated directly in ngx_http_upstream_init_request().
Return a INTERNAL_SERVER_ERROR response instead.

diffstat:

 src/http/ngx_http_upstream.c |  5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diffs (15 lines):

diff --git a/src/http/ngx_http_upstream.c b/src/http/ngx_http_upstream.c
--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -519,6 +519,11 @@ ngx_http_upstream_init_request(ngx_http_
             return;
         }
 
+        if (rc == NGX_ERROR) {
+            ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
+            return;
+        }
+
         if (rc != NGX_DECLINED) {
             ngx_http_finalize_request(r, rc);
             return;