84 lines
3.4 KiB
Java
84 lines
3.4 KiB
Java
/*
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* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8303742
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* @summary CompletableFuture.orTimeout can leak memory if completed exceptionally
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* @modules java.base/java.util.concurrent:open
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* @run junit/othervm -Xmx128m CompletableFutureOrTimeoutExceptionallyTest
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*/
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import java.time.Duration;
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import java.util.concurrent.BlockingQueue;
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import java.util.concurrent.CompletableFuture;
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import java.util.concurrent.ScheduledThreadPoolExecutor;
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import java.util.concurrent.TimeUnit;
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import org.junit.jupiter.api.Test;
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import static org.junit.jupiter.api.Assertions.assertTrue;
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class CompletableFutureOrTimeoutExceptionallyTest {
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static final BlockingQueue<Runnable> delayerQueue;
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static {
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try {
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var delayerClass = Class.forName("java.util.concurrent.CompletableFuture$Delayer",
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true,
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CompletableFuture.class.getClassLoader());
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var delayerField = delayerClass.getDeclaredField("delayer");
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delayerField.setAccessible(true);
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delayerQueue = ((ScheduledThreadPoolExecutor)delayerField.get(null)).getQueue();
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} catch (Throwable t) {
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throw new ExceptionInInitializerError(t);
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}
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}
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/**
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* Test that orTimeout task is cancelled if the CompletableFuture is completed Exceptionally
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*/
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@Test
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void testOrTimeoutWithCompleteExceptionallyDoesNotLeak() throws InterruptedException {
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assertTrue(delayerQueue.peek() == null);
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var future = new CompletableFuture<>().orTimeout(12, TimeUnit.HOURS);
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assertTrue(delayerQueue.peek() != null);
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future.completeExceptionally(new RuntimeException("This is fine"));
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while (delayerQueue.peek() != null) {
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Thread.sleep(100);
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};
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}
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/**
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* Test that the completeOnTimeout task is cancelled if the CompletableFuture is completed Exceptionally
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*/
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@Test
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void testCompleteOnTimeoutWithCompleteExceptionallyDoesNotLeak() throws InterruptedException {
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assertTrue(delayerQueue.peek() == null);
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var future = new CompletableFuture<>().completeOnTimeout(null, 12, TimeUnit.HOURS);
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assertTrue(delayerQueue.peek() != null);
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future.completeExceptionally(new RuntimeException("This is fine"));
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while (delayerQueue.peek() != null) {
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Thread.sleep(100);
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};
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}
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}
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