File Content

/* * Copyright (c) 2002, 2010, 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 4701299 * @summary Keep-Alive-Timer thread management in KeepAliveCache causes memory leak */ import java.net.*; import java.io.*; public class KeepAliveTimerThread { static class Fetcher implements Runnable { String url; Fetcher(String url) { this.url = url; } public void run() { try { InputStream in = (new URL(url)).openConnection().getInputStream(); byte b[] = new byte[128]; int n; do { n = in.read(b); } while (n > 0); in.close(); } catch (Exception x) { x.printStackTrace(); } } } static class Server extends Thread { ServerSocket server; Server (ServerSocket server) { super (); this.server = server; } void readAll (Socket s) throws IOException { byte[] buf = new byte [128]; InputStream is = s.getInputStream (); s.setSoTimeout(1000); try { while (is.read(buf) > 0) ; } catch (SocketTimeoutException x) { } } /* * Our "http" server to return a 404 */ public void run() { try { Socket s = server.accept(); readAll(s); PrintStream out = new PrintStream( new BufferedOutputStream( s.getOutputStream() )); /* send the header */ out.print("HTTP/1.1 200 OK\r\n"); out.print("Content-Type: text/html; charset=iso-8859-1\r\n"); out.print("Content-Length: 78\r\n"); out.print("\r\n"); out.print(""); out.print("File Content"); out.print("A dummy body."); out.print(""); out.flush(); s.close(); } catch (Exception e) { e.printStackTrace(); } finally { try { server.close(); } catch (IOException unused) {} } } } public static void main(String args[]) throws Exception { ServerSocket ss = new ServerSocket(0); Server s = new Server (ss); s.start(); String url = "http://127.0.0.1:"+ss.getLocalPort(); // start fetch in its own thread group ThreadGroup grp = new ThreadGroup("MyGroup"); // http request in another thread group Thread thr = new Thread(grp, new Fetcher(url)); thr.start(); thr.join(); // fetcher is done - the group should now be empty if (grp.activeCount() > 0) { throw new RuntimeException("Keep-alive thread started in wrong thread group"); } grp.destroy(); } }