nginx 0.8.53 *) Feature: now the "error_page" directive allows to change a status code in a redirect. *) Feature: the "gzip_disable" directive supports special "degradation" mask. *) Bugfix: a socket leak might occurred if file AIO was used. Thanks to Maxim Dounin. *) Bugfix: if the first server had no "listen" directive and there was no explicit default server, then a next server with a "listen" directive became the default server; the bug had appeared in 0.8.21.

--- a/src/os/unix/ngx_linux_aio_read.c
+++ b/src/os/unix/ngx_linux_aio_read.c
@@ -95,6 +95,10 @@ ngx_file_aio_read(ngx_file_t *file, u_ch
     n = io_submit(ngx_aio_ctx, 1, piocb);
 
     if (n == 1) {
+        ev->active = 1;
+        ev->ready = 0;
+        ev->complete = 0;
+
         return NGX_AGAIN;
     }