132 lines
4.6 KiB
Java
132 lines
4.6 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.catalina.loader;
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import java.io.IOException;
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import java.util.concurrent.LinkedBlockingQueue;
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import java.util.concurrent.ThreadPoolExecutor;
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import java.util.concurrent.TimeUnit;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.junit.Assert;
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import org.junit.Test;
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import org.apache.catalina.Context;
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import org.apache.catalina.core.StandardContext;
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import org.apache.catalina.startup.Tomcat;
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import org.apache.catalina.startup.TomcatBaseTest;
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public class TestWebappClassLoaderExecutorMemoryLeak extends TomcatBaseTest {
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@Test
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public void testTimerThreadLeak() throws Exception {
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Tomcat tomcat = getTomcatInstance();
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// No file system docBase required
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Context ctx = tomcat.addContext("", null);
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if (ctx instanceof StandardContext) {
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((StandardContext) ctx).setClearReferencesStopThreads(true);
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}
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ExecutorServlet executorServlet = new ExecutorServlet();
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Tomcat.addServlet(ctx, "taskServlet", executorServlet);
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ctx.addServletMappingDecoded("/", "taskServlet");
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tomcat.start();
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// This will trigger the timer & thread creation
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getUrl("http://localhost:" + getPort() + "/");
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// Stop the context
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ctx.stop();
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// Should be shutdown once the stop() method above exists
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Assert.assertTrue(executorServlet.tpe.isShutdown());
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// The time taken to shutdown the executor can vary between systems. Try
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// to avoid false test failures due to timing issues. Give the executor
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// upto 10 seconds to close down.
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int count = 0;
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while (count < 100 && !executorServlet.tpe.isTerminated()) {
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count++;
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Thread.sleep(100);
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}
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// If the executor has not terminated, there is a thread/memory leak
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Assert.assertTrue(executorServlet.tpe.isTerminated());
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}
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static class ExecutorServlet extends HttpServlet {
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private static final long serialVersionUID = 1L;
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int nTasks = 5;
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long n = 1000L;
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int tpSize = 10;
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public transient volatile ThreadPoolExecutor tpe;
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@Override
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protected void doGet(HttpServletRequest req, HttpServletResponse resp)
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throws ServletException, IOException {
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resp.getWriter().println(
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"The current thread served " + this + " servlet");
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tpe = new ThreadPoolExecutor(tpSize, tpSize, 50000L,
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TimeUnit.MILLISECONDS, new LinkedBlockingQueue<Runnable>());
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Task[] tasks = new Task[nTasks];
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for (int i = 0; i < nTasks; i++) {
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tasks[i] = new Task("Task " + i);
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tpe.execute(tasks[i]);
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}
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resp.getWriter().println("Started " + nTasks +
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" never ending tasks using the ThreadPoolExecutor");
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resp.getWriter().flush();
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}
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class Task implements Runnable {
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String _id;
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public Task(String id) {
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this._id = id;
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}
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@Override
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public void run() {
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try {
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while (!Thread.currentThread().isInterrupted()) {
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Thread.sleep(20000);
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System.out.println(Thread.currentThread().getClass()
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+ " [" + Thread.currentThread().getName()
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+ "] executing " + this._id);
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}
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} catch (InterruptedException e) {
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System.out.println(Thread.currentThread().getClass() + " ["
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+ Thread.currentThread().getName() + "] EXITING");
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}
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}
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}
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}
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}
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