8344346: java/net/httpclient/ShutdownNow.java fails with java.lang.AssertionError: client was still running, but exited after further delay: timeout should be adjusted

Reviewed-by: jpai

Author: dfuch

test/jdk/java/net/httpclient/ShutdownNow.java

@@ -30,6 +30,7 @@
  *          isTerminated.
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.httpclient.test.lib.http2.Http2TestServer jdk.test.lib.net.SimpleSSLContext
+ *        jdk.test.lib.RandomFactory jdk.test.lib.Utils
  *        ReferenceTracker
  * @run testng/othervm
  *       -Djdk.internal.httpclient.debug=true
@@ -41,8 +42,6 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.net.InetAddress;
-import java.net.InetSocketAddress;
 import java.net.URI;
 import java.net.http.HttpClient;
 import java.net.http.HttpClient.Redirect;
@@ -58,20 +57,12 @@
 import java.util.concurrent.CompletionException;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ExecutionException;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-import java.util.concurrent.RejectedExecutionException;
-import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicLong;
 import jdk.httpclient.test.lib.common.HttpServerAdapters;
-import jdk.httpclient.test.lib.http2.Http2TestServer;
 import javax.net.ssl.SSLContext;
-import javax.net.ssl.SSLHandshakeException;
 
-import com.sun.net.httpserver.HttpServer;
-import com.sun.net.httpserver.HttpsConfigurator;
-import com.sun.net.httpserver.HttpsServer;
 import jdk.test.lib.RandomFactory;
+import jdk.test.lib.Utils;
 import jdk.test.lib.net.SimpleSSLContext;
 import org.testng.annotations.AfterTest;
 import org.testng.annotations.BeforeTest;
@@ -211,7 +202,7 @@ void testConcurrent(String uriString) throws Exception {
             }
             CompletableFuture.allOf(responses.toArray(new CompletableFuture<?>[0])).get();
         } finally {
-            if (client.awaitTermination(Duration.ofMillis(2500))) {
+            if (client.awaitTermination(Duration.ofMillis(Utils.adjustTimeout(1000)))) {
                 out.println("Client terminated within expected delay");
                 assertTrue(client.isTerminated());
             } else {
@@ -277,7 +268,7 @@ void testSequential(String uriString) throws Exception {
                 }).thenCompose((c) -> c).get();
             }
        } finally {
-            if (client.awaitTermination(Duration.ofMillis(2500))) {
+            if (client.awaitTermination(Duration.ofMillis(Utils.adjustTimeout(1000)))) {
                 out.println("Client terminated within expected delay");
                 assertTrue(client.isTerminated());
             } else {