1 /* 2 * Copyright (c) 2004, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 5039210 27 * @summary test on a client notification deadlock. 28 * @author Shanliang JIANG 29 * @modules java.management 30 * @run clean DeadLockTest 31 * @run build DeadLockTest 32 * @run main DeadLockTest 33 */ 34 35 import java.net.MalformedURLException; 36 import java.io.IOException; 37 import java.util.HashMap; 38 39 import javax.management.*; 40 import javax.management.remote.*; 41 42 public class DeadLockTest { 43 private static final String[] protocols = {"rmi", "iiop", "jmxmp"}; 44 private static final MBeanServer mbs = MBeanServerFactory.createMBeanServer(); 45 46 public static void main(String[] args) { 47 System.out.println(">>> test on a client notification deadlock."); 48 49 boolean ok = true; 50 for (int i = 0; i < protocols.length; i++) { 51 try { 52 test(protocols[i]); 53 } catch (Exception e) { 54 System.out.println(">>> Test failed for " + protocols[i]); 55 e.printStackTrace(System.out); 56 } 57 } 58 59 System.out.println(">>> Test passed"); 60 } 61 62 private static void test(String proto) 63 throws Exception { 64 System.out.println(">>> Test for protocol " + proto); 65 66 JMXServiceURL u = null; 67 JMXConnectorServer server = null; 68 69 HashMap env = new HashMap(2); 70 // server will close a client connection after 1 second 71 env.put("jmx.remote.x.server.connection.timeout", "1000"); 72 73 // disable the client ping 74 env.put("jmx.remote.x.client.connection.check.period", "0"); 75 76 try { 77 u = new JMXServiceURL(proto, null, 0); 78 server = JMXConnectorServerFactory.newJMXConnectorServer(u, env, mbs); 79 } catch (MalformedURLException e) { 80 System.out.println(">>> Skipping unsupported URL " + proto); 81 } 82 83 server.start(); 84 85 JMXServiceURL addr = server.getAddress(); 86 87 long st = 2000; 88 MyListener myListener; 89 90 // a cycle to make sure that we test the blocking problem. 91 do { 92 JMXConnector client = JMXConnectorFactory.connect(addr, env); 93 MBeanServerConnection conn = client.getMBeanServerConnection(); 94 myListener = new MyListener(conn); 95 client.addConnectionNotificationListener(myListener, null, null); 96 97 // wait the server to close the client connection 98 Thread.sleep(st); 99 100 // makes the listener to do a remote request via the connection 101 // which should be closed by the server. 102 conn.getDefaultDomain(); 103 104 // allow the listner to have time to work 105 Thread.sleep(100); 106 107 // get a closed notif, should no block. 108 client.close(); 109 Thread.sleep(100); 110 111 st += 2000; 112 113 } while(!myListener.isDone()); 114 115 server.stop(); 116 } 117 118 private static class MyListener implements NotificationListener { 119 public MyListener(MBeanServerConnection conn) { 120 this.conn = conn; 121 } 122 123 public void handleNotification(Notification n, Object h) { 124 if (n instanceof JMXConnectionNotification) { 125 JMXConnectionNotification jcn = (JMXConnectionNotification)n; 126 final String type = jcn.getType(); 127 System.out.println(">>> The listener receives notif with the type:"+type); 128 129 if (JMXConnectionNotification.CLOSED.equals(type) || 130 JMXConnectionNotification.FAILED.equals(type)) { 131 132 synchronized(this) { 133 done = false; 134 } 135 136 try { 137 conn.getDefaultDomain(); 138 } catch (IOException ioe) { 139 // Greate ! 140 } 141 142 synchronized(this) { 143 done = true; 144 } 145 146 System.out.println(">>> The listener is not blocked!"); 147 } 148 } 149 } 150 151 public boolean isDone() { 152 synchronized(this) { 153 return done; 154 } 155 } 156 157 private boolean done = false; 158 private MBeanServerConnection conn; 159 } 160 }