nginx 0.1.29 *) Feature: the ngx_http_ssi_module supports "include virtual" command. *) Feature: the ngx_http_ssi_module supports the condition command like 'if expr="$NAME"' and "else" and "endif" commands. Only one nested level is supported. *) Feature: the ngx_http_ssi_module supports the DATE_LOCAL and DATE_GMT variables and "config timefmt" command. *) Feature: the "ssi_ignore_recycled_buffers" directive. *) Bugfix: the "echo" command did not show the default value for the empty QUERY_STRING variable. *) Change: the ngx_http_proxy_module was rewritten. *) Feature: the "proxy_redirect", "proxy_pass_request_headers", "proxy_pass_request_body", and "proxy_method" directives. *) Feature: the "proxy_set_header" directive. The "proxy_x_var" was canceled and must be replaced with the proxy_set_header directive. *) Change: the "proxy_preserve_host" is canceled and must be replaced with the "proxy_set_header Host $host" and the "proxy_redirect off" directives, the "proxy_set_header Host $host:$proxy_port" directive and the appropriate proxy_redirect directives. *) Change: the "proxy_set_x_real_ip" is canceled and must be replaced with the "proxy_set_header X-Real-IP $remote_addr" directive. *) Change: the "proxy_add_x_forwarded_for" is canceled and must be replaced with the "proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for" directive. *) Change: the "proxy_set_x_url" is canceled and must be replaced with the "proxy_set_header X-URL http://$host:$server_port$request_uri" directive. *) Feature: the "fastcgi_param" directive. *) Change: the "fastcgi_root", "fastcgi_set_var" and "fastcgi_params" directive are canceled and must be replaced with the fastcgi_param directives. *) Feature: the "index" directive can use the variables. *) Feature: the "index" directive can be used at http and server levels. *) Change: the last index only in the "index" directive can be absolute. *) Feature: the "rewrite" directive can use the variables. *) Feature: the "internal" directive. *) Feature: the CONTENT_LENGTH, CONTENT_TYPE, REMOTE_PORT, SERVER_ADDR, SERVER_PORT, SERVER_PROTOCOL, DOCUMENT_ROOT, SERVER_NAME, REQUEST_METHOD, REQUEST_URI, and REMOTE_USER variables. *) Change: nginx now passes the invalid lines in a client request headers or a backend response header. *) Bugfix: if the backend did not transfer response for a long time and the "send_timeout" was less than "proxy_read_timeout", then nginx returned the 408 response. *) Bugfix: the segmentation fault was occurred if the backend sent an invalid line in response header; bug appeared in 0.1.26. *) Bugfix: the segmentation fault may occurred in FastCGI fault tolerance configuration. *) Bugfix: the "expires" directive did not remove the previous "Expires" and "Cache-Control" headers. *) Bugfix: nginx did not take into account trailing dot in "Host" header line. *) Bugfix: the ngx_http_auth_module did not work under Linux. *) Bugfix: the rewrite directive worked incorrectly, if the arguments were in a request. *) Bugfix: nginx could not be built on MacOS X.

--- a/src/event/ngx_event_pipe.c
+++ b/src/event/ngx_event_pipe.c
@@ -64,13 +64,13 @@ ngx_int_t ngx_event_pipe(ngx_event_pipe_
         }
     }
 
-    if (p->downstream->fd != -1) {
+    if (p->downstream->fd != -1 && p->downstream->data == p->output_ctx) {
         wev = p->downstream->write;
         if (ngx_handle_write_event(wev, p->send_lowat) == NGX_ERROR) {
             return NGX_ABORT;
         }
 
-        if (wev->active) {
+        if (wev->active && !wev->ready && !wev->delayed) {
             ngx_add_timer(wev, p->send_timeout);
         }
     }
@@ -180,8 +180,10 @@ static ngx_int_t ngx_event_pipe_read_ups
                 chain->buf = b;
                 chain->next = NULL;
 
-            } else if (!p->cachable && p->downstream->write->ready) {
-
+            } else if (!p->cachable
+                       && p->downstream->data == p->output_ctx
+                       && p->downstream->write->ready)
+            {
                 /*
                  * if the bufs are not needed to be saved in a cache and
                  * a downstream is ready then write the bufs to a downstream
@@ -409,10 +411,18 @@ static ngx_int_t ngx_event_pipe_write_to
 
             /* pass the p->out and p->in chains to the output filter */
 
+            for (cl = p->busy; cl; cl = cl->next) {
+                cl->buf->recycled = 0;
+            }
+
             if (p->out) {
                 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
                                "pipe write downstream flush out");
 
+                for (cl = p->out; cl; cl = cl->next) {
+                    cl->buf->recycled = 0;
+                }
+
                 if (p->output_filter(p->output_ctx, p->out) == NGX_ERROR) {
                     p->downstream_error = 1;
                     return ngx_event_pipe_drain_chains(p);
@@ -425,6 +435,10 @@ static ngx_int_t ngx_event_pipe_write_to
                 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
                                "pipe write downstream flush in");
 
+                for (cl = p->in; cl; cl = cl->next) {
+                    cl->buf->recycled = 0;
+                }
+
                 if (p->output_filter(p->output_ctx, p->in) == NGX_ERROR) {
                     p->downstream_error = 1;
                     return ngx_event_pipe_drain_chains(p);
@@ -442,7 +456,9 @@ static ngx_int_t ngx_event_pipe_write_to
             break;
         }
 
-        if (!p->downstream->write->ready) {
+        if (p->downstream->data != p->output_ctx
+            || !p->downstream->write->ready)
+        {
             break;
         }