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/*
* Copyright (c) 2004, 2024, 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 5039210
* @summary test on a client notification deadlock.
* @author Shanliang JIANG
*
* @requires vm.compMode != "Xcomp"
* @comment Running with -Xcomp is likely to cause a timeout while establishing the connection
* (RMI: java.rmi.NoSuchObjectException: no such object in table).
*
* @run clean DeadLockTest
* @run build DeadLockTest
* @run main DeadLockTest
*/
import java.net.MalformedURLException;
import java.io.IOException;
import java.util.HashMap;
import javax.management.*;
import javax.management.remote.*;
public class DeadLockTest {
private static final String[] protocols = {"rmi", "iiop", "jmxmp"};
private static final MBeanServer mbs = MBeanServerFactory.createMBeanServer();
public static void main(String[] args) {
System.out.println(">>> test on a client notification deadlock.");
boolean fail = false;
for (int i = 0; i < protocols.length; i++) {
try {
test(protocols[i]);
} catch (Exception e) {
fail = true; // any one protocol failure, fails the test
System.out.println(">>> Test failed for " + protocols[i]);
e.printStackTrace(System.out);
}
}
if (fail) {
throw new RuntimeException("FAILED");
}
System.out.println(">>> Test passed");
}
private static void test(String proto) throws Exception {
System.out.println(">>> Test for protocol " + proto);
JMXServiceURL u = null;
JMXConnectorServer server = null;
HashMap env = new HashMap(2);
// server will close a client connection after 1 second
env.put("jmx.remote.x.server.connection.timeout", "1000");
// disable the client ping
env.put("jmx.remote.x.client.connection.check.period", "0");
try {
u = new JMXServiceURL(proto, null, 0);
server = JMXConnectorServerFactory.newJMXConnectorServer(u, env, mbs);
} catch (MalformedURLException e) {
System.out.println(">>> Skipping unsupported URL " + proto);
return; // skip testing this protocol
}
server.start();
JMXServiceURL addr = server.getAddress();
long st = 2000;
MyListener myListener;
// a cycle to make sure that we test the blocking problem.
do {
JMXConnector client = JMXConnectorFactory.connect(addr, env);
MBeanServerConnection conn = client.getMBeanServerConnection();
myListener = new MyListener(conn);
client.addConnectionNotificationListener(myListener, null, null);
// wait the server to close the client connection
Thread.sleep(st);
// makes the listener to do a remote request via the connection
// which should be closed by the server.
conn.getDefaultDomain();
// allow the listener to have time to work
Thread.sleep(100);
// get a closed notif, should not block.
client.close();
Thread.sleep(100);
st += 2000;
} while(!myListener.isDone());
server.stop();
}
private static class MyListener implements NotificationListener {
public MyListener(MBeanServerConnection conn) {
this.conn = conn;
}
public void handleNotification(Notification n, Object h) {
if (n instanceof JMXConnectionNotification) {
JMXConnectionNotification jcn = (JMXConnectionNotification)n;
final String type = jcn.getType();
System.out.println(">>> The listener receives notif with the type:"+type);
if (JMXConnectionNotification.CLOSED.equals(type) ||
JMXConnectionNotification.FAILED.equals(type)) {
synchronized(this) {
done = false;
}
try {
conn.getDefaultDomain();
} catch (IOException ioe) {
// OK
}
synchronized(this) {
done = true;
}
System.out.println(">>> The listener is not blocked!");
}
}
}
public boolean isDone() {
synchronized(this) {
return done;
}
}
private boolean done = false;
private MBeanServerConnection conn;
}
}
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