WINDOWS2K JDK1.3 NOT STABLE

Question

Hi, my platform:
win2k server, tomcat 1.3.2 , jdk1.3.1. My application runs fast but sometimes, one time a day, java virtual machine crash.
I had'nt problem with jre 1.2.2, everything is stable. I thought that the problem resides in my web application or tomcat but i discovered this problem in another machine, with the identical platform. I installed jre 1.2.2 and now it's ok.
I think that jdk1.3.x under Windows2000 Server is not stable. I wrote a simple program, TomcatGuardian, that check if tomcat service is up, else restart it.
This program, with jdk1.3.1 after 20 -24 hours crash!!!!
Anyone have similar problem ?
Ivan.
package com.ips.TomcatGuardian;
import com.ips.Utility.*;
import java.lang.*;
import java.net.*;
import java.io.*;
/*Title: TomcatGuardian
//Version: 1.0
//Copyright: Copyright (c) 2000
//Author: dott. Ivan Pasquale
//Company: xx
//Description: Tomcat launcher under WINDOWS 2000
//FeedBack: [email protected]
public class TomcatGuardian extends Thread
     private Socket GuardianSocket = null;
     private String TomcatAddress;
     private int TomcatPort;
     private String ServiceName;     
     private com.ips.Utility.MailManager Mailer;
     private com.ips.Utility.PropertiesManager myPropertiesManager;
     private int CheckTimeRange;
     public TomcatGuardian(String ServiceNameParam)
          ServiceName = ServiceNameParam;          
          /* Creo un istanza della classe di gestione delle Mail */
          Mailer = new com.ips.Utility.MailManager();
          /* Creo un istanza della classe di configurazione */
          myPropertiesManager = new PropertiesManager("TomcatGuardian.properties");               
          TomcatAddress = myPropertiesManager.getProperty("TomcatAddress");
          TomcatPort = new Integer(myPropertiesManager.getProperty("TomcatPort")).intValue();
          CheckTimeRange = (new Integer(myPropertiesManager.getProperty("CheckTimeRange")).intValue())*1000;
     /** verify if tomcat is alive */
     public boolean isTomcatAlive()
          try
               //System.out.print("Checking Tomcat status .....");
               GuardianSocket = new Socket(TomcatAddress,TomcatPort);                              
               GuardianSocket.close();
               //System.out.println("Ok[X]");
          catch(IOException ioe)
               com.ips.Utility.LogBook.record(ioe.getMessage());
               String MessageToWebMaster = new String();
               MessageToWebMaster+="Signore, ho riavviato Tomcat alle "+ (new java.util.Date()).toString();
               MessageToWebMaster+=" dalla macchina "+TomcatAddress;
               Mailer.sendErrorToWebMaster("TomcatGuardian",MessageToWebMaster);
               // TOMCAT IS DOWN
               return false;
          return true;
     /** start tomcat */
     public void startTomcat()
          try
               Runtime myRuntimeProcess = Runtime.getRuntime();
               Process TomcatStartProcess = myRuntimeProcess.exec("net start "+ServiceName);
               TomcatStartProcess.waitFor();
          catch(InterruptedException ie)
               com.ips.Utility.LogBook.record(ie.getMessage());
          catch(IOException ioe)
               com.ips.Utility.LogBook.record(ioe.getMessage());
     public void run()
          System.out.println("TomcatGuardian v1.0 View LogBook.log for detail..");
          try
               while(true)
                    //com.ips.Utility.LogBook.record("Checking Tomcat ....");
                    if(isTomcatAlive())
                         //com.ips.Utility.LogBook.record("Ok check passed");
                    else
                         com.ips.Utility.LogBook.record("Tomcat is down!!!!!!!");
                         com.ips.Utility.LogBook.record("Starting the server .....");
                         startTomcat();
                         com.ips.Utility.LogBook.record("done!");
                         /* controllo ogni trenta secondi*/                         
                    this.sleep(CheckTimeRange);
          catch (NullPointerException npe)
               com.ips.Utility.LogBook.record(npe.getMessage());
               npe.printStackTrace();
          catch (Exception e)
               com.ips.Utility.LogBook.record(e.getMessage());
     public static void main(String args[])      
          new TomcatGuardian("Tomcat").start();          

Answer 1

Actually, I have THREE versions of java.exe running! Some applications have their own VMs.
I'm running the JigSaw server from W3C (which is good for web pages, but a poor servlet platform), TomCat (which doesn't do web pages, but is a good servlet platform), and the TSpaces server (a good tuple-space implementation from IBM, which is my database). All are written in Java. Then my own desktop application runs on the JRE, accessing those three servers. If I then run some of my latest applets, they use the 1.3 plug-in, and getting into the Sun web site starts the Java found in Netscape.
So I could potentially be running 6 copies of the JVM, not just 3, which strikes me as pretty silly. I want Java on silicon.
Something's wrong; in my experience there shouldn't be two java.exe processes. I only have one for Tomcat.