FULL PRODUCT VERSION :
java 10 2018-03-20

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 10.0.16299.334]

A DESCRIPTION OF THE PROBLEM :
java.lang.InterruptedException from "pool.awaitTermination(10, TimeUnit.MINUTES" not waiting

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the source code

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Wait for 10 minutes or until all threads complete with:

pool.awaitTermination(10, TimeUnit.MINUTES);
ACTUAL -
java.lang.InterruptedException

ERROR MESSAGES/STACK TRACES THAT OCCUR :
WARNING: Using incubator modules: jdk.incubator.httpclient
java.lang.InterruptedException
at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:385)
at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1999)
at jdk.incubator.httpclient/jdk.incubator.http.HttpClientImpl.send(HttpClientImpl.java:402)
at jdk.incubator.httpclient/jdk.incubator.http.HttpClientFacade.send(HttpClientFacade.java:101)
at Java10Bug/Main.Main.run(Main.java:43)
at java.base/java.util.concurrent.ForkJoinTask$AdaptedRunnableAction.exec(ForkJoinTask.java:1407)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1603)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)
java.lang.InterruptedException
at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:385)
at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1999)
at jdk.incubator.httpclient/jdk.incubator.http.HttpClientImpl.send(HttpClientImpl.java:402)
at jdk.incubator.httpclient/jdk.incubator.http.HttpClientFacade.send(HttpClientFacade.java:101)
at Java10Bug/Main.Main.run(Main.java:43)
at java.base/java.util.concurrent.ForkJoinTask$AdaptedRunnableAction.exec(ForkJoinTask.java:1407)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1603)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)
java.lang.InterruptedException
at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:385)
at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1999)
at jdk.incubator.httpclient/jdk.incubator.http.HttpClientImpl.send(HttpClientImpl.java:402)
at jdk.incubator.httpclient/jdk.incubator.http.HttpClientFacade.send(HttpClientFacade.java:101)
at Java10Bug/Main.Main.run(Main.java:43)
at java.base/java.util.concurrent.ForkJoinTask$AdaptedRunnableAction.exec(ForkJoinTask.java:1407)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1603)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)
java.lang.InterruptedException
at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:385)
at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1999)
at jdk.incubator.httpclient/jdk.incubator.http.HttpClientImpl.send(HttpClientImpl.java:402)
at jdk.incubator.httpclient/jdk.incubator.http.HttpClientFacade.send(HttpClientFacade.java:101)
at Java10Bug/Main.Main.run(Main.java:43)
at java.base/java.util.concurrent.ForkJoinTask$AdaptedRunnableAction.exec(ForkJoinTask.java:1407)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1603)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)
java.lang.InterruptedException
at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:385)
at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1999)
at jdk.incubator.httpclient/jdk.incubator.http.HttpClientImpl.send(HttpClientImpl.java:402)
at jdk.incubator.httpclient/jdk.incubator.http.HttpClientFacade.send(HttpClientFacade.java:101)
at Java10Bug/Main.Main.run(Main.java:43)
at java.base/java.util.concurrent.ForkJoinTask$AdaptedRunnableAction.exec(ForkJoinTask.java:1407)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1603)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)
java.lang.InterruptedException
at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:385)
at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1999)
at jdk.incubator.httpclient/jdk.incubator.http.HttpClientImpl.send(HttpClientImpl.java:402)
at jdk.incubator.httpclient/jdk.incubator.http.HttpClientFacade.send(HttpClientFacade.java:101)
at Java10Bug/Main.Main.run(Main.java:43)
at java.base/java.util.concurrent.ForkJoinTask$AdaptedRunnableAction.exec(ForkJoinTask.java:1407)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1603)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)
java.lang.InterruptedException
at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:385)
at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1999)
at jdk.incubator.httpclient/jdk.incubator.http.HttpClientImpl.send(HttpClientImpl.java:402)
at jdk.incubator.httpclient/jdk.incubator.http.HttpClientFacade.send(HttpClientFacade.java:101)
at Java10Bug/Main.Main.run(Main.java:43)
at java.base/java.util.concurrent.ForkJoinTask$AdaptedRunnableAction.exec(ForkJoinTask.java:1407)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1603)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)
java.lang.InterruptedException
at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:385)
at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1999)
at jdk.incubator.httpclient/jdk.incubator.http.HttpClientImpl.send(HttpClientImpl.java:402)
at jdk.incubator.httpclient/jdk.incubator.http.HttpClientFacade.send(HttpClientFacade.java:101)
at Java10Bug/Main.Main.run(Main.java:43)
at java.base/java.util.concurrent.ForkJoinTask$AdaptedRunnableAction.exec(ForkJoinTask.java:1407)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1603)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)
java.lang.InterruptedException
at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:385)
at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1999)
at jdk.incubator.httpclient/jdk.incubator.http.HttpClientImpl.send(HttpClientImpl.java:402)
at jdk.incubator.httpclient/jdk.incubator.http.HttpClientFacade.send(HttpClientFacade.java:101)
at Java10Bug/Main.Main.run(Main.java:43)
at java.base/java.util.concurrent.ForkJoinTask$AdaptedRunnableAction.exec(ForkJoinTask.java:1407)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1603)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)
java.lang.InterruptedException
at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:385)
at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1999)
at jdk.incubator.httpclient/jdk.incubator.http.HttpClientImpl.send(HttpClientImpl.java:402)
at jdk.incubator.httpclient/jdk.incubator.http.HttpClientFacade.send(HttpClientFacade.java:101)
at Java10Bug/Main.Main.run(Main.java:43)
at java.base/java.util.concurrent.ForkJoinTask$AdaptedRunnableAction.exec(ForkJoinTask.java:1407)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1603)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package Main;

import jdk.incubator.http.HttpClient;
import jdk.incubator.http.HttpRequest;
import jdk.incubator.http.HttpResponse;

import java.net.URI;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

public class Main implements Runnable {

    private static HttpClient client = HttpClient.newHttpClient();

    public static void main(String[] args) {
        ExecutorService pool = Executors.newWorkStealingPool(10);

        for (int i = 1; i <= 10; i++) {
            pool.submit(new Main());
        }

        /*
        try {
            TimeUnit.SECONDS.sleep(10); // Wait 10 seconds for threads to finish
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        */

        try {
            pool.shutdown();
            pool.awaitTermination(10, TimeUnit.MINUTES);
        } catch (Exception e) {
            System.err.println("Exception: " + e);
        } finally {
            pool.shutdownNow();
        }
    }

    public void run() {
        try {
            HttpResponse<String> response1 = client.send(HttpRequest.newBuilder()
                    .uri(new URI("https://lolnames.gg/en/"))
                    .build(), HttpResponse.BodyHandler.asString());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}


-------- module-info.java ---------

module Java10Bug {
    requires jdk.incubator.httpclient;
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
In the source code uncomment the sleep between /* */ and it works