Name: rmT116609 Date: 11/13/2001


java -version "1.4.0-beta3"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta3-b84)
Java Hotspot(TM) Client VM (build 1.4.0-beta3-b84, mixed mode)

The sample below shows the use of a timer that we use quite frequently in our
code. When it works as expected, my worker thread should wake up every 7
seconds and interrupt my timer thread causing it to reset. The timer should
never call retry(). This works fine under versions prior to jdk1.4.0-b3.
Under 1.4.0-b3 the retryTimer.interrupt() call doesn't interrupt the timer as
expected other than the first time my worker thread wakes up.

Requested additional info...
1.
   javac ThreadTest.java
   java ThreadTest

2.
import java.util.Date ;

public class ThreadTest extends Thread {
   private RetryTimer retryTimer ;
   private int retryPeriod ;

   public ThreadTest(int retryPeriod) {
      this.retryPeriod = retryPeriod ;
      retryTimer = new RetryTimer(retryPeriod) ;
      retryTimer.start() ;
   }

   public void retry() {
      System.out.println(new Date(System.currentTimeMillis())+"...retry called...") ;
   }

   public void run() {
      while(true) {
         try {
            sleep(7000) ;
            System.out.println(new Date(System.currentTimeMillis())+"[run()] interrupting retry timer...") ;
            retryTimer.interrupt() ;
         } catch(InterruptedException ie) { System.out.println("error: "+ie.getMessage()) ; }
      }
   }

   class RetryTimer extends Thread {
      private int period ;
      private boolean oldData ;

      public RetryTimer(int p) {
         period = p ;
         oldData = true ;
         setDaemon(true) ;
      }

      public void run() {
         while(true) {
            try {
               oldData = true ;
               sleep(period) ;
            } catch(InterruptedException e) {
               System.out.println(new Date(System.currentTimeMillis())+"[RetryTimer]interrupted!!!") ;
               oldData = false ;
            }
            if(oldData)
               retry() ;
         }
      }
   }

   public static void main(String[] args) {
      (new ThreadTest(33000)).start() ;
   }

}

3.
  No error messages

4.
  The output when run under jdk 1.4.0-b3 is as follows:

% java ThreadTest
Fri Nov 09 18:54:41 GMT 2001[run()]interrupting retry timer...
Fri Nov 09 18:54:41 GMT 2001[RetryTimer]interrupted!!!
Fri Nov 09 18:54:48 GMT 2001[run()]interrupting retry timer...
Fri Nov 09 18:54:55 GMT 2001[run()]interrupting retry timer...
Fri Nov 09 18:55:02 GMT 2001[run()]interrupting retry timer...
Fri Nov 09 18:55:09 GMT 2001[run()]interrupting retry timer...
Fri Nov 09 18:55:14 GMT 2001...retry called...
Fri Nov 09 18:55:14 GMT 2001[RetryTimer]interrupted!!!
Fri Nov 09 18:55:16 GMT 2001[run()]interrupting retry timer...
Fri Nov 09 18:55:23 GMT 2001[run()]interrupting retry timer...
Fri Nov 09 18:55:30 GMT 2001[run()]interrupting retry timer...
Fri Nov 09 18:55:37 GMT 2001[run()]interrupting retry timer...
Fri Nov 09 18:55:44 GMT 2001[run()]interrupting retry timer...
Fri Nov 09 18:55:47 GMT 2001...retry called...
Fri Nov 09 18:55:47 GMT 2001[RetryTimer]interrupted!!!
Fri Nov 09 18:55:51 GMT 2001[run()]interrupting retry timer...
Fri Nov 09 18:55:58 GMT 2001[run()]interrupting retry timer...
Fri Nov 09 18:56:05 GMT 2001[run()]interrupting retry timer...

The expected output (obtained under jdk1.3.1-b24) is as follows:

% java ThreadTest
Fri Nov 09 18:58:58 GMT 2001[run()]interrupting retry timer...
Fri Nov 09 18:58:58 GMT 2001[RetryTimer]interrupted!!!
Fri Nov 09 18:59:05 GMT 2001[run()]interrupting retry timer...
Fri Nov 09 18:59:05 GMT 2001[RetryTimer]interrupted!!!
Fri Nov 09 18:59:12 GMT 2001[run()]interrupting retry timer...
Fri Nov 09 18:59:12 GMT 2001[RetryTimer]interrupted!!!
Fri Nov 09 18:59:19 GMT 2001[run()]interrupting retry timer...
Fri Nov 09 18:59:19 GMT 2001[RetryTimer]interrupted!!!
Fri Nov 09 18:59:26 GMT 2001[run()]interrupting retry timer...
Fri Nov 09 18:59:26 GMT 2001[RetryTimer]interrupted!!!
Fri Nov 09 18:59:33 GMT 2001[run()]interrupting retry timer...
Fri Nov 09 18:59:33 GMT 2001[RetryTimer]interrupted!!!
Fri Nov 09 18:59:40 GMT 2001[run()]interrupting retry timer...
Fri Nov 09 18:59:40 GMT 2001[RetryTimer]interrupted!!!
Fri Nov 09 18:59:47 GMT 2001[run()]interrupting retry timer...
Fri Nov 09 18:59:47 GMT 2001[RetryTimer]interrupted!!!


java version "1.4.0-beta2"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta2-b77)
Java HotSpot(TM) Client VM (build 1.4.0-beta2-b77, mixed mode)
$ % java -cp . ThreadTest
Tue Nov 13 11:45:32 PST 2001[run()] interrupting retry timer...
Tue Nov 13 11:45:32 PST 2001[RetryTimer]interrupted!!!
Tue Nov 13 11:45:39 PST 2001[run()] interrupting retry timer...
Tue Nov 13 11:45:39 PST 2001[RetryTimer]interrupted!!!
Tue Nov 13 11:45:46 PST 2001[run()] interrupting retry timer...
Tue Nov 13 11:45:46 PST 2001[RetryTimer]interrupted!!!
Tue Nov 13 11:45:53 PST 2001[run()] interrupting retry timer...
Tue Nov 13 11:45:53 PST 2001[RetryTimer]interrupted!!!
Tue Nov 13 11:46:00 PST 2001[run()] interrupting retry timer...

The problem is not reproducible on Windows 2000, Linux Redhat 6.2 using JDK1.4.0-beta3.
(Review ID: 135381)
======================================================================