diff -ruNp nginx-1.2.7/src/http/ngx_http_upstream.c nginx-1.2.7_zls/src/http/ngx_http_upstream.c
--- nginx-1.2.7/src/http/ngx_http_upstream.c	2013-02-18 23:08:46.000000000 +0800
+++ nginx-1.2.7_zls/src/http/ngx_http_upstream.c	2013-03-13 00:01:01.490582380 +0800
@@ -878,11 +878,13 @@ ngx_http_upstream_cache_send(ngx_http_re
 static void
 ngx_http_upstream_resolve_handler(ngx_resolver_ctx_t *ctx)
 {
+    ngx_connection_t              *c;
     ngx_http_request_t            *r;
     ngx_http_upstream_t           *u;
     ngx_http_upstream_resolved_t  *ur;
 
     r = ctx->data;
+    c = r->connection;
 
     u = r->upstream;
     ur = u->resolved;
@@ -894,7 +896,8 @@ ngx_http_upstream_resolve_handler(ngx_re
                       ngx_resolver_strerror(ctx->state));
 
         ngx_http_upstream_finalize_request(r, u, NGX_HTTP_BAD_GATEWAY);
-        return;
+
+        goto posted_requests;
     }
 
     ur->naddrs = ctx->naddrs;
@@ -919,13 +922,17 @@ ngx_http_upstream_resolve_handler(ngx_re
     if (ngx_http_upstream_create_round_robin_peer(r, ur) != NGX_OK) {
         ngx_http_upstream_finalize_request(r, u,
                                            NGX_HTTP_INTERNAL_SERVER_ERROR);
-        return;
+        goto posted_requests;
     }
 
     ngx_resolve_name_done(ctx);
     ur->ctx = NULL;
 
     ngx_http_upstream_connect(r, u);
+
+posted_requests:
+
+    ngx_http_run_posted_requests(c);
 }