8299827: Add resolved IP address in connection exception for sockets

Backport-of: 92d8326e4037605897d7c4eb4b3edb63a2fc11b0

src/java.base/share/classes/sun/net/util/SocketExceptions.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -67,16 +67,7 @@ public static IOException of(IOException e, SocketAddress addr) {
     }
 
     private static IOException ofInet(IOException e, InetSocketAddress addr) {
-        int port = addr.getPort();
-        String host = addr.getHostString();
-        StringBuilder sb = new StringBuilder();
-        sb.append(e.getMessage());
-        sb.append(": ");
-        sb.append(host);
-        sb.append(':');
-        sb.append(Integer.toString(port));
-        String enhancedMsg = sb.toString();
-        return create(e, enhancedMsg);
+        return create(e, String.join(": ", e.getMessage(), addr.toString()));
     }
 
     private static IOException ofUnixDomain(IOException e, UnixDomainSocketAddress addr) {

test/jdk/java/net/Socket/ExceptionText.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -57,6 +57,7 @@
  */
 
 import java.io.IOException;
+import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.net.Socket;
 import java.nio.channels.AsynchronousSocketChannel;
@@ -83,6 +84,7 @@ public static void main(String args[]) throws Exception {
     static final InetSocketAddress dest  = Utils.refusingEndpoint();
     static final String PORT = ":" + Integer.toString(dest.getPort());
     static final String HOST = dest.getHostString();
+    static final InetAddress ADDRESS = dest.getAddress();
 
     static void test(boolean withProperty) {
         // Socket
@@ -104,11 +106,11 @@ static void checkResult(IOException e, boolean withProperty) {
                 throw new RuntimeException("Test failed: exception contains address info");
             }
         } else {
-            if (!msg.contains(HOST) || !msg.contains(PORT)) {
+            if (!msg.contains(HOST) || !msg.contains(PORT) ||
+                !msg.contains(ADDRESS.getHostAddress())) {
                 if (e instanceof ClosedChannelException)
                     return; // has no detail msg
-                System.err.println("msg = " + msg);
-                throw new RuntimeException("Test failed: exception does not contain address info");
+                throw new RuntimeException("Test failed: message '" + msg + "' is missing address info " + dest);
             }
         }
     }