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/*
* Copyright (c) 2013, 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 8006395 8012244
* @summary Tests racing code that reads and closes a Socket
*/
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.ConnectException;
import java.net.SocketException;
import java.util.concurrent.Phaser;
// Racey test, will not always fail, but if it does then we have a problem.
public class Race {
final static int THREADS = 100;
public static void main(String[] args) throws Exception {
try (ServerSocket ss = new ServerSocket(0)) {
final int port = ss.getLocalPort();
final Phaser phaser = new Phaser(THREADS + 1);
for (int i=0; i<100; i++) {
try {
final Socket s = new Socket("localhost", port);
s.setSoLinger(false, 0);
try (Socket sa = ss.accept()) {
sa.setSoLinger(false, 0);
final InputStream is = s.getInputStream();
Thread[] threads = new Thread[THREADS];
for (int j=0; j<THREADS; j++) {
threads[j] = new Thread() {
public void run() {
try {
phaser.arriveAndAwaitAdvance();
while (is.read() != -1)
Thread.sleep(50);
} catch (Exception x) {
if (!(x instanceof SocketException
&& x.getMessage().equalsIgnoreCase("socket closed")))
x.printStackTrace();
// ok, expect Socket closed
}
}};
}
for (int j=0; j<100; j++)
threads[j].start();
phaser.arriveAndAwaitAdvance();
s.close();
for (int j=0; j<100; j++)
threads[j].join();
}
} catch (ConnectException e) {
System.err.println("Exception " + e + " Port: " + port);
}
}
}
}
}
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