1 /* 2 * Copyright (c) 2010, 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 import java.util.logging.*; 25 26 public class LoggerWeakRefLeak extends SimpleApplication { 27 // The test driver script will allow this program to run until we 28 // reach DEFAULT_LOOP_TIME or a decrease in instance counts is 29 // observed. For these particular WeakReference leaks, the count 30 // was always observed to be increasing so if we get a decreasing 31 // count, then the leaks are fixed in the bits being tested. 32 // Two minutes has been enough time to observe a decrease in 33 // fixed bits on overloaded systems, but the test will likely 34 // finish more quickly. 35 public static int DEFAULT_LOOP_TIME = 120; // time is in seconds 36 37 // execute the LoggerWeakRefLeak app work 38 public void doMyAppWork(String[] args) throws Exception { 39 int loop_time = 0; 40 int max_loop_time = DEFAULT_LOOP_TIME; 41 42 // args[0] is the port-file 43 if (args.length < 2) { 44 System.out.println("INFO: using default time of " 45 + max_loop_time + " seconds."); 46 } else { 47 try { 48 max_loop_time = Integer.parseInt(args[1]); 49 } catch (NumberFormatException nfe) { 50 throw new RuntimeException("Error: '" + args[1] 51 + "': is not a valid seconds value."); 52 } 53 } 54 55 long count = 0; 56 int loggerCount = 0; 57 long now = 0; 58 long startTime = System.currentTimeMillis(); 59 60 while (now < (startTime + (max_loop_time * 1000))) { 61 if ((count % 1000) == 0) { 62 // Print initial call count to let caller know that 63 // we're up and running and then periodically 64 System.out.println("INFO: call count = " + count); 65 } 66 67 for (int i = 0; i < 100; i++) { 68 // This Logger call is leaking two different WeakReferences: 69 // - one in LogManager.LogNode 70 // - one in Logger.kids 71 java.util.logging.Logger.getLogger("logger-" + loggerCount); 72 count++; 73 if (++loggerCount >= 25000) { 74 // Limit the Logger namespace used by the test so 75 // the weak refs in LogManager.loggers that are 76 // being properly managed don't skew the counts 77 // by too much. 78 loggerCount = 0; 79 } 80 } 81 82 try { 83 // delay for 1/10 of a second to avoid CPU saturation 84 Thread.sleep(100); 85 } catch (InterruptedException ie) { 86 // ignore any exceptions 87 } 88 89 now = System.currentTimeMillis(); 90 } 91 92 System.out.println("INFO: final loop count = " + count); 93 } 94 95 public static void main(String[] args) throws Exception { 96 AnonLoggerWeakRefLeak myApp = new AnonLoggerWeakRefLeak(); 97 98 SimpleApplication.setMyApp(myApp); 99 100 SimpleApplication.main(args); 101 } 102 }