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/*
* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 8303742
* @summary CompletableFuture.orTimeout can leak memory if completed exceptionally
* @modules java.base/java.util.concurrent:open
* @run junit/othervm -Xmx128m CompletableFutureOrTimeoutExceptionallyTest
*/
import java.time.Duration;
import java.util.concurrent.ForkJoinPool;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.TimeUnit;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
class CompletableFutureOrTimeoutExceptionallyTest {
// updated February 2025 to adapt to CompletableFuture DelayScheduler changes
/**
* Test that orTimeout task is cancelled if the CompletableFuture is completed Exceptionally
*/
@Test
void testOrTimeoutWithCompleteExceptionallyDoesNotLeak() throws InterruptedException {
ForkJoinPool delayer = ForkJoinPool.commonPool();
assertEquals(delayer.getDelayedTaskCount(), 0);
var future = new CompletableFuture<>().orTimeout(12, TimeUnit.HOURS);
future.completeExceptionally(new RuntimeException("This is fine"));
while (delayer.getDelayedTaskCount() > 0) {
Thread.sleep(100);
};
}
/**
* Test that the completeOnTimeout task is cancelled if the CompletableFuture is completed Exceptionally
*/
@Test
void testCompleteOnTimeoutWithCompleteExceptionallyDoesNotLeak() throws InterruptedException {
ForkJoinPool delayer = ForkJoinPool.commonPool();
assertEquals(delayer.getDelayedTaskCount(), 0);
var future = new CompletableFuture<>().completeOnTimeout(null, 12, TimeUnit.HOURS);
future.completeExceptionally(new RuntimeException("This is fine"));
while (delayer.getDelayedTaskCount() > 0) {
Thread.sleep(100);
};
}
}
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