wy96f commented on a change in pull request #2726: ARTEMIS-2392 Enable remove on cancel policy for scheduled pool URL: https://github.com/apache/activemq-artemis/pull/2726#discussion_r314691138
########## File path: artemis-server/src/test/java/org/apache/activemq/artemis/core/server/impl/ActiveMQServerImplTest.java ########## @@ -0,0 +1,63 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.activemq.artemis.core.server.impl; + +import java.lang.ref.WeakReference; +import java.util.concurrent.ScheduledExecutorService; +import java.util.concurrent.ScheduledFuture; +import java.util.concurrent.TimeUnit; + +import org.apache.activemq.artemis.core.server.ActiveMQServer; +import org.apache.activemq.artemis.tests.util.ActiveMQTestBase; +import org.junit.Assert; +import org.junit.Test; + +public class ActiveMQServerImplTest extends ActiveMQTestBase { + + @Test + public void testScheduledPoolGC() throws Exception { + ActiveMQServer server = createServer(false); + + server.start(); + + Runnable scheduledRunnable = new Runnable() { + @Override + public void run() { + Assert.fail(); + } + }; + WeakReference<Runnable> scheduledRunnableRef = new WeakReference<>(scheduledRunnable); + + ScheduledExecutorService scheduledPool = server.getScheduledPool(); + ScheduledFuture scheduledFuture = scheduledPool.schedule(scheduledRunnable, 5000, TimeUnit.MILLISECONDS); + + Assert.assertFalse(scheduledFuture.isCancelled()); + Assert.assertTrue(scheduledFuture.cancel(true)); + Assert.assertTrue(scheduledFuture.isCancelled()); + + Assert.assertNotEquals(null, scheduledRunnableRef.get()); Review comment: `Assert.assertNotEquals(null, scheduledRunnableRef.get());` should be put before `Assert.assertTrue(scheduledFuture.cancel(true));`. GC might occur right at this moment and cause reference object cleared, resulting in test failure. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
