Name: rm29839 Date: 11/25/97


I have a multi-threaded app which is creating dates using a simpledateformat.
Occasionally 2 extra characters appear in my date format. Usually they are "00", and
can appear anywhere in the formatted string. Calling format again with the same date object
corrects the string. I can only reproduce it in a multi-threaded situation, and it occurs about
1 time out of 500. Here is a snippet of code where I am creating the date. I check in here to make sure tha thte
date is correct before returning the result.

package p2k;
import java.util.*;
import java.text.*;

public class TimeManager {
  protected SimpleDateFormat formatter;
  protected Calendar cal;
  protected TimeZone tz;
  public TimeManager() {
    this.formatter = new SimpleDateFormat("HH:mm:ss M-dd-yyyy");
    this.tz = TimeZone.getDefault();
    // Debug.p("In timezone: " +tz.getID());
    
    this.cal = Calendar.getInstance(tz);
    this.formatter.setCalendar(this.cal);
    this.formatter.setTimeZone(tz);
    // Debug.p("Local Time: "+cal.getTime().toString());
    // Debug.p("Formatted time: "+this.getTime());
  }

  public String getTime() {
    cal = Calendar.getInstance(tz);
    formatter.setCalendar(cal);
    formatter.setTimeZone(tz);
    Date d = cal.getTime();
    String dt = formatter.format(d);
    int x = 0;
    while(dt.length() != 19 && x<5) {
      x++;
      Debug.p("TimeLength Error #"+x+" -> "+dt);
      dt = formatter.format(d);
    }
  
    return(dt);
  }

}


Here is some sample output:

tail -f debuglog.log | egrep TimeLength
Sun Nov 23 16:46:07 EST 1997 TimeLength Error #1 -> 16:0046:07 11-23-1997
Sun Nov 23 16:48:00 EST 1997 TimeLength Error #1 -> 0016:48:00 11-23-1997
Sun Nov 23 16:48:18 EST 1997 TimeLength Error #1 -> 16:48.97:18 11-23-1997
Sun Nov 23 16:49:40 EST 1997 TimeLength Error #1 -> 16:0049:40 11-23-1997
Sun Nov 23 16:53:33 EST 1997 TimeLength Error #1 -> 16:0053:33 11-23-1997
Sun Nov 23 17:01:22 EST 1997 TimeLength Error #1 -> 0017:01:22 11-23-1997
Sun Nov 23 17:02:29 EST 1997 TimeLength Error #1 -> 17:02:29 11-29.97-1997
Sun Nov 23 17:03:26 EST 1997 TimeLength Error #1 -> 17:03:26 0011-23-1997
Sun Nov 23 17:11:04 EST 1997 TimeLength Error #1 -> 17:11:0004 11-23-1997
Sun Nov 23 17:15:06 EST 1997 TimeLength Error #1 -> 17:0015:06 11-23-1997
(Review ID: 20798)
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