nginx 0.1.37 *) Change: now the "\n" is added to the end of the "nginx.pid" file. *) Bugfix: the responses may be transferred not completely, if many parts or the big parts were included by SSI. *) Bugfix: if all backends had returned the 404 reponse and the "http_404" parameter of the "proxy_next_upstream" or "fastcgi_next_upstream" directives was used, then nginx started to request all backends again.

--- a/src/core/ngx_cycle.c
+++ b/src/core/ngx_cycle.c
@@ -744,7 +744,7 @@ ngx_int_t ngx_create_pidfile(ngx_cycle_t
     }
 
     if (!ngx_test_config) {
-        len = ngx_sprintf(pid, "%P", ngx_pid) - pid;
+        len = ngx_sprintf(pid, "%P%N", ngx_pid) - pid;
 
         if (ngx_write_file(&file, pid, len, 0) == NGX_ERROR) {
             return NGX_ERROR;