$ cat Get.java

import java.net.InetSocketAddress;
import java.net.ProxySelector;
import java.net.URI;
import jdk.incubator.http.HttpClient;
import jdk.incubator.http.HttpRequest;
import jdk.incubator.http.HttpResponse;

class Get {

   public static void main(String... args) {
       HttpClient.newBuilder()
               .followRedirects(HttpClient.Redirect.ALWAYS)
               .build()
               .sendAsync(HttpRequest.newBuilder(URI.create(args[0])).build(), HttpResponse.BodyHandler.asString())
               .thenApply(HttpResponse::body)
               .thenAccept(System.out::println)
               .join();
   }

}
$ ./build/macosx-x86_64-normal-server-release/images/jdk/bin/java --add-modules jdk.incubator.httpclient Get http://stackoverflow.com/
WARNING: Using incubator modules: jdk.incubator.httpclient
Exception in thread “main” java.util.concurrent.CompletionException: java.io.IOException: /10.175.196.73:49421: GOAWAY received
    at java.base/java.util.concurrent.CompletableFuture.encodeRelay(CompletableFuture.java:367)
    at java.base/java.util.concurrent.CompletableFuture.completeRelay(CompletableFuture.java:376)
    at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1074)
    at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:506)
    at java.base/java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:2088)
    at jdk.incubator.httpclient/jdk.incubator.http.Stream.completeResponseExceptionally(Stream.java:874)
    at jdk.incubator.httpclient/jdk.incubator.http.Stream.cancelImpl(Stream.java:925)
    at jdk.incubator.httpclient/jdk.incubator.http.Http2Connection.shutdown(Http2Connection.java:555)
    at jdk.incubator.httpclient/jdk.incubator.http.Http2Connection.handleGoAway(Http2Connection.java:780)
    at jdk.incubator.httpclient/jdk.incubator.http.Http2Connection.handleConnectionFrame(Http2Connection.java:680)
    at jdk.incubator.httpclient/jdk.incubator.http.Http2Connection.processFrame(Http2Connection.java:593)
    at jdk.incubator.httpclient/jdk.incubator.http.internal.frame.FramesDecoder.decode(FramesDecoder.java:156)
    at jdk.incubator.httpclient/jdk.incubator.http.Http2Connection$FramesController.processReceivedData(Http2Connection.java:195)
    at jdk.incubator.httpclient/jdk.incubator.http.Http2Connection.asyncReceive(Http2Connection.java:528)
    at jdk.incubator.httpclient/jdk.incubator.http.Http2Connection$Http2TubeSubscriber.processQueue(Http2Connection.java:1054)
    at jdk.incubator.httpclient/jdk.incubator.http.internal.common.SequentialScheduler$SynchronizedRestartableTask.run(SequentialScheduler.java:175)
    at jdk.incubator.httpclient/jdk.incubator.http.internal.common.SequentialScheduler$CompleteRestartableTask.run(SequentialScheduler.java:147)
    at jdk.incubator.httpclient/jdk.incubator.http.internal.common.SequentialScheduler$SchedulableTask.run(SequentialScheduler.java:198)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
    at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: java.io.IOException: /10.175.196.73:49421: GOAWAY received
    at jdk.incubator.httpclient/jdk.incubator.http.Http2Connection.handleGoAway(Http2Connection.java:781)
    ... 12 more