Switch from DNS name to IP literal for IsReachableViaLoopbackTest.

Test was flaking due to DNS lookups so remove that dependency.

Google Public DNS should be long-lived enough for this purpose and
responds to ping requests so is suitable for testing
InetAddress.isReachable().

Bug: 33364197
Test: atest CtsLibcoreOjTestCases:test.java.net.InetAddress.IsReachableViaLoopbackTest
Change-Id: I121bfa16c4c52920cb0e45d46d8a57a48871555d

1 files changed, 3 insertions, 2 deletions

diff --git a/ojluni/src/test/java/net/InetAddress/IsReachableViaLoopbackTest.java b/ojluni/src/test/java/net/InetAddress/IsReachableViaLoopbackTest.java
index 7bcf9b63e91..8607b8bc4b5 100644
--- a/ojluni/src/test/java/net/InetAddress/IsReachableViaLoopbackTest.java
+++ b/ojluni/src/test/java/net/InetAddress/IsReachableViaLoopbackTest.java
@@ -40,9 +40,10 @@ public class IsReachableViaLoopbackTest {
     public void testReachableViaLoopback() {
         try {
             InetAddress addr = InetAddress.getByName("localhost");
-            // Android-changed: use alternative DNS address (b/255943063#comment49).
+            // Android-changed: use alternative DNS address (b/255943063#comment49)
+            // and switch to literal address to avoid DNS lookup flakes.
             // InetAddress remoteAddr = InetAddress.getByName("bugs.openjdk.java.net");
-            InetAddress remoteAddr = InetAddress.getByName("www.google.com");
+            InetAddress remoteAddr = InetAddress.getByAddress(new byte[]{8, 8, 8, 8});
             if (!addr.isReachable(10000))
                 fail("Localhost should always be reachable");
             NetworkInterface inf = NetworkInterface.getByInetAddress(addr);