src/java.base/share/classes/java/net/NoRouteToHostException.java

*** 32,41 ****
--- 32,42 ----
   * if an intermediate router is down.
   *
   * @since   1.1
   */
  public class NoRouteToHostException extends SocketException {
+     @java.io.Serial
      private static final long serialVersionUID = -1897550894873493790L;
  
      /**
       * Constructs a new NoRouteToHostException with the specified detail
       * message as to why the remote host cannot be reached.