--- old/src/java.base/share/classes/java/net/HttpRetryException.java	2019-08-27 17:27:57.178324386 -0700
+++ new/src/java.base/share/classes/java/net/HttpRetryException.java	2019-08-27 17:27:56.986324386 -0700
@@ -37,6 +37,7 @@
  */
 public
 class HttpRetryException extends IOException {
+    @java.io.Serial
     private static final long serialVersionUID = -9186022286469111381L;
 
     private int responseCode;