test/java/util/logging/LoggerWeakRefLeak.java

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   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 {
  27     // AnonLoggerWeakRefLeak checks for one weak reference leak.
  28     // LoggerWeakRefLeak checks for two weak reference leaks so
  29     // this test runs twice as long, by default.





  30     public static int DEFAULT_LOOP_TIME = 120;  // time is in seconds
  31 
  32     public static void main(String[] args) {

  33         int loop_time = 0;
  34         int max_loop_time = DEFAULT_LOOP_TIME;
  35 
  36         if (args.length == 0) {

  37             System.out.println("INFO: using default time of "
  38                 + max_loop_time + " seconds.");
  39         } else {
  40             try {
  41                 max_loop_time = Integer.parseInt(args[0]);
  42             } catch (NumberFormatException nfe) {
  43                 System.err.println("Error: '" + args[0]
  44                     + "': is not a valid seconds value.");
  45                 System.err.println("Usage: LoggerWeakRefLeak [seconds]");
  46                 System.exit(1);
  47             }
  48         }
  49 
  50         long count = 0;
  51         int  loggerCount = 0;
  52         long now = 0;
  53         long startTime = System.currentTimeMillis();
  54 
  55         while (now < (startTime + (max_loop_time * 1000))) {
  56             if ((count % 1000) == 0) {
  57                 // Print initial call count to let caller know that
  58                 // we're up and running and then periodically
  59                 System.out.println("INFO: call count = " + count);
  60             }
  61 
  62             for (int i = 0; i < 100; i++) {
  63                 // This Logger call is leaking two different WeakReferences:
  64                 // - one in LogManager.LogNode
  65                 // - one in Logger.kids
  66                 java.util.logging.Logger.getLogger("logger-" + loggerCount);


  69                     // Limit the Logger namespace used by the test so
  70                     // the weak refs in LogManager.loggers that are
  71                     // being properly managed don't skew the counts
  72                     // by too much.
  73                     loggerCount = 0;
  74                 }
  75             }
  76 
  77             try {
  78                 // delay for 1/10 of a second to avoid CPU saturation
  79                 Thread.sleep(100);
  80             } catch (InterruptedException ie) {
  81                 // ignore any exceptions
  82             }
  83 
  84             now = System.currentTimeMillis();
  85         }
  86 
  87         System.out.println("INFO: final loop count = " + count);
  88     }








  89 }


   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);


  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 }