2 files changed, 19 insertions, 4 deletions
diff --git a/src/core/nginx.h b/src/core/nginx.h
index a72666cdd..ba70b4ceb 100644
--- a/src/core/nginx.h
+++ b/src/core/nginx.h
@@ -9,8 +9,8 @@
 #define _NGINX_H_INCLUDED_
 
 
-#define nginx_version      1019008
-#define NGINX_VERSION      "1.19.8"
+#define nginx_version      1019009
+#define NGINX_VERSION      "1.19.9"
 #define NGINX_VER          "nginx/" NGINX_VERSION
 
 #ifdef NGX_BUILD
diff --git a/src/core/ngx_resolver.c b/src/core/ngx_resolver.c
index 5b716ee75..49616b776 100644
--- a/src/core/ngx_resolver.c
+++ b/src/core/ngx_resolver.c
@@ -1563,13 +1563,28 @@ ngx_resolver_udp_read(ngx_event_t *rev)
     do {
         n = ngx_udp_recv(c, buf, NGX_RESOLVER_UDP_SIZE);
 
-        if (n < 0) {
-            return;
+        if (n == NGX_AGAIN) {
+            break;
+        }
+
+        if (n == NGX_ERROR) {
+            goto failed;
         }
 
         ngx_resolver_process_response(rec->resolver, buf, n, 0);
 
     } while (rev->ready);
+
+    if (ngx_handle_read_event(rev, 0) != NGX_OK) {
+        goto failed;
+    }
+
+    return;
+
+failed:
+
+    ngx_close_connection(rec->udp);
+    rec->udp = NULL;
 }