1 /* 2 * Copyright (c) 2000, 2008, 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 /* @test 25 * @bug 4331349 26 * @summary synopsis: unexporting doesn't guarantee that DGC will 27 * let go of remote object 28 * 29 * @author Ann Wollrath 30 * 31 * @build UnexportLeak 32 * @build UnexportLeak_Stub 33 * @build Ping 34 * @run main/othervm UnexportLeak 35 */ 36 37 import java.lang.ref.*; 38 import java.rmi.*; 39 import java.rmi.server.*; 40 import java.rmi.registry.*; 41 42 public class UnexportLeak implements Ping { 43 44 private static int PORT = 2006; 45 46 public void ping() { 47 } 48 49 public static void main(String[] args) { 50 try { 51 System.err.println("\nRegression test for bug 4331349\n"); 52 LocateRegistry.createRegistry(PORT); 53 Remote obj = new UnexportLeak(); 54 WeakReference wr = new WeakReference(obj); 55 UnicastRemoteObject.exportObject(obj); 56 LocateRegistry.getRegistry(PORT).rebind("UnexportLeak", obj); 57 UnicastRemoteObject.unexportObject(obj, true); 58 obj = null; 59 flushRefs(); 60 if (wr.get() != null) { 61 System.err.println("FAILED: unexported object not collected"); 62 throw new RuntimeException( 63 "FAILED: unexported object not collected"); 64 } else { 65 System.err.println("PASSED: unexported object collected"); 66 } 67 } catch (RemoteException e) { 68 System.err.println( 69 "FAILED: RemoteException encountered: " + e.getMessage()); 70 e.printStackTrace(); 71 throw new RuntimeException("FAILED: RemoteException encountered"); 72 } 73 } 74 75 /** 76 * Force desparate garbage collection so that all WeakReference instances 77 * will be cleared. 78 */ 79 private static void flushRefs() { 80 java.util.Vector chain = new java.util.Vector(); 81 try { 82 while (true) { 83 int[] hungry = new int[65536]; 84 chain.addElement(hungry); 85 } 86 } catch (OutOfMemoryError e) { 87 } 88 } 89 }