FULL PRODUCT VERSION :
java version "1.6.0"
Java(TM) SE Runtime Environment (build 1.6.0-b105)
Java HotSpot(TM) Client VM (build 1.6.0-b105, mixed mode, sharing)

FULL OS VERSION :
Microsoft Windows XP Professional Version 2002 Service Pack 2

A DESCRIPTION OF THE PROBLEM :
I have a class for querying an MS Access database. The database is queryied every one second in a separarate thread, when the user clicks on the "start" button. The program crashes when I call the query method from the run() or the action handler. In other cases works fine.

THE PROBLEM WAS REPRODUCIBLE WITH -Xint FLAG: Yes

THE PROBLEM WAS REPRODUCIBLE WITH -server FLAG: Did not try

ERROR MESSAGES/STACK TRACES THAT OCCUR :
#
# An unexpected error has been detected by Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x7c911010, pid=3176, tid=1080
#
# Java VM: Java HotSpot(TM) Client VM (1.6.0-b105 mixed mode, sharing)
# Problematic frame:
# C [ntdll.dll+0x1010]
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
#

--------------- T H R E A D ---------------

Current thread (0x07f93c00): JavaThread "Thread-2" [_thread_in_native, id=1080]

siginfo: ExceptionCode=0xc0000005, reading address 0x00000018

Registers:
EAX=0x00000004, EBX=0x269b4e60, ECX=0x7ffd4000, EDX=0x00000004
ESP=0x0301f908, EBP=0x0301f920, ESI=0x00000000, EDI=0x02e11348
EIP=0x7c911010, EFLAGS=0x00010246

  Top of Stack: (sp=0x0301f908)
0x0301f908: 74605a16 00000004 02e1136c 745d139f
0x0301f918: 02e1136c 02e11348 0301f930 745d2c5d
0x0301f928: 02e1136c 07f93ce8 0301f944 745d5fa0
0x0301f938: 02e11348 74600000 00000001 0301f960
0x0301f948: 745d740e 02e11348 0301f980 00000003
0x0301f958: 07f91ff8 07f93ce8 0301f978 6d3f124e
0x0301f968: 02e11348 0301f980 07f93c00 269b4e60
0x0301f978: 0301f9bc 0091a430 00000000 0301f9d8

Instructions: (pc=0x7c911010)
0x7c911000: 90 90 90 90 90 64 8b 0d 18 00 00 00 8b 54 24 04
0x7c911010: 83 7a 14 00 75 4f f0 ff 42 04 75 19 8b 41 24 89


Stack: [0x02fd0000,0x03020000), sp=0x0301f908, free space=318k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C [ntdll.dll+0x1010]
C [ODBC32.dll+0x2c5d]
C [ODBC32.dll+0x5fa0]
C [ODBC32.dll+0x740e]
C [JdbcOdbc.dll+0x124e]
j sun.jdbc.odbc.JdbcOdbc.allocStmt(J[B)J+0
j sun.jdbc.odbc.JdbcOdbc.SQLAllocStmt(J)J+47
j sun.jdbc.odbc.JdbcOdbcConnection.createStatement(II)Ljava/sql/Statement;+27
j sun.jdbc.odbc.JdbcOdbcConnection.createStatement()Ljava/sql/Statement;+7
j Log.getErrorStatus()I+6
j ThreadApp.run()V+30
j java.lang.Thread.run()V+11
v ~StubRoutines::call_stub

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j sun.jdbc.odbc.JdbcOdbc.allocStmt(J[B)J+0
j sun.jdbc.odbc.JdbcOdbc.SQLAllocStmt(J)J+47
j sun.jdbc.odbc.JdbcOdbcConnection.createStatement(II)Ljava/sql/Statement;+27
j sun.jdbc.odbc.JdbcOdbcConnection.createStatement()Ljava/sql/Statement;+7
j Log.getErrorStatus()I+6
j ThreadApp.run()V+30
j java.lang.Thread.run()V+11
v ~StubRoutines::call_stub

--------------- P R O C E S S ---------------

Java Threads: ( => current thread )
=>0x07f93c00 JavaThread "Thread-2" [_thread_in_native, id=1080]
  0x00296000 JavaThread "DestroyJavaVM" [_thread_blocked, id=2340]
  0x02b18800 JavaThread "AWT-EventQueue-0" [_thread_blocked, id=4056]
  0x02b10800 JavaThread "AWT-Windows" daemon [_thread_in_native, id=2624]
  0x02b0fc00 JavaThread "AWT-Shutdown" [_thread_blocked, id=2648]
  0x02b0d400 JavaThread "Java2D Disposer" daemon [_thread_blocked, id=2444]
  0x02a5cc00 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=4020]
  0x02a57c00 JavaThread "CompilerThread0" daemon [_thread_blocked, id=3136]
  0x02a56800 JavaThread "Attach Listener" daemon [_thread_blocked, id=1624]
  0x02a55c00 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=2744]
  0x02a51400 JavaThread "Finalizer" daemon [_thread_blocked, id=1644]
  0x02a4d000 JavaThread "Reference Handler" daemon [_thread_blocked, id=632]

Other Threads:
  0x02a43c00 VMThread [id=944]
  0x02a77400 WatcherThread [id=2260]

VM state:not at safepoint (normal execution)

VM Mutex/Monitor currently owned by a thread: None

Heap
 def new generation total 960K, used 292K [0x22990000, 0x22a90000, 0x22e70000)
  eden space 896K, 25% used [0x22990000, 0x229c91d8, 0x22a70000)
  from space 64K, 100% used [0x22a80000, 0x22a90000, 0x22a90000)
  to space 64K, 0% used [0x22a70000, 0x22a70000, 0x22a80000)
 tenured generation total 4096K, used 341K [0x22e70000, 0x23270000, 0x26990000)
   the space 4096K, 8% used [0x22e70000, 0x22ec5770, 0x22ec5800, 0x23270000)
 compacting perm gen total 12288K, used 607K [0x26990000, 0x27590000, 0x2a990000)
   the space 12288K, 4% used [0x26990000, 0x26a27d10, 0x26a27e00, 0x27590000)
    ro space 8192K, 62% used [0x2a990000, 0x2ae8b9c8, 0x2ae8ba00, 0x2b190000)
    rw space 12288K, 52% used [0x2b190000, 0x2b7ce348, 0x2b7ce400, 0x2bd90000)

Dynamic libraries:
0x00400000 - 0x00423000 C:\WINXP\system32\java.exe
0x7c910000 - 0x7c9c7000 C:\WINXP\system32\ntdll.dll
0x7c800000 - 0x7c906000 C:\WINXP\system32\kernel32.dll
0x77da0000 - 0x77e4a000 C:\WINXP\system32\ADVAPI32.dll
0x77e50000 - 0x77ee1000 C:\WINXP\system32\RPCRT4.dll
0x7c340000 - 0x7c396000 C:\Programme\Java\jre1.6.0\bin\msvcr71.dll
0x6d7c0000 - 0x6da07000 C:\Programme\Java\jre1.6.0\bin\client\jvm.dll
0x77d10000 - 0x77da0000 C:\WINXP\system32\USER32.dll
0x77ef0000 - 0x77f37000 C:\WINXP\system32\GDI32.dll
0x76af0000 - 0x76b1e000 C:\WINXP\system32\WINMM.dll
0x76330000 - 0x7634d000 C:\WINXP\system32\IMM32.DLL
0x6d310000 - 0x6d318000 C:\Programme\Java\jre1.6.0\bin\hpi.dll
0x76bb0000 - 0x76bbb000 C:\WINXP\system32\PSAPI.DLL
0x6d770000 - 0x6d77c000 C:\Programme\Java\jre1.6.0\bin\verify.dll
0x6d3b0000 - 0x6d3cf000 C:\Programme\Java\jre1.6.0\bin\java.dll
0x6d7b0000 - 0x6d7bf000 C:\Programme\Java\jre1.6.0\bin\zip.dll
0x6d000000 - 0x6d1c3000 C:\Programme\Java\jre1.6.0\bin\awt.dll
0x72f70000 - 0x72f96000 C:\WINXP\system32\WINSPOOL.DRV
0x77be0000 - 0x77c38000 C:\WINXP\system32\msvcrt.dll
0x774b0000 - 0x775ed000 C:\WINXP\system32\ole32.dll
0x6d3f0000 - 0x6d3fd000 C:\Programme\Java\jre1.6.0\bin\JdbcOdbc.dll
0x745d0000 - 0x7460d000 C:\WINXP\system32\ODBC32.dll
0x5d450000 - 0x5d4ea000 C:\WINXP\system32\COMCTL32.dll
0x7c9d0000 - 0x7d1ef000 C:\WINXP\system32\SHELL32.dll
0x77f40000 - 0x77fb6000 C:\WINXP\system32\SHLWAPI.dll
0x76350000 - 0x7639a000 C:\WINXP\system32\comdlg32.dll
0x773a0000 - 0x774a3000 C:\WINXP\WinSxS\x86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.2600.2982_x-ww_ac3f9c03\comctl32.dll
0x20000000 - 0x20019000 C:\WINXP\system32\odbcint.dll
0x77fc0000 - 0x77fd1000 C:\WINXP\system32\Secur32.dll
0x5b0f0000 - 0x5b128000 C:\WINXP\system32\uxtheme.dll
0x736d0000 - 0x73719000 C:\WINXP\system32\ddraw.dll
0x73b30000 - 0x73b36000 C:\WINXP\system32\DCIMAN32.dll
0x6d2b0000 - 0x6d303000 C:\Programme\Java\jre1.6.0\bin\fontmanager.dll
0x746a0000 - 0x746eb000 C:\WINXP\system32\MSCTF.dll
0x75250000 - 0x7527e000 C:\WINXP\system32\msctfime.ime
0x6d570000 - 0x6d583000 C:\Programme\Java\jre1.6.0\bin\net.dll
0x71a10000 - 0x71a27000 C:\WINXP\system32\WS2_32.dll
0x71a00000 - 0x71a08000 C:\WINXP\system32\WS2HELP.dll
0x6d590000 - 0x6d599000 C:\Programme\Java\jre1.6.0\bin\nio.dll

VM Arguments:
java_command: ThreadApp
Launcher Type: SUN_STANDARD

Environment Variables:
PATH=x:\cPerl\bin;C:\Programme\ActiveState Komodo 3.5\;C:\WINXP\system32;C:\WINXP\HPC\CAPM;C:\WINXP;C:\WINXP\system32\Wbem;C:\WINXP\Tools;C:\Programme\Microsoft SQL Server\80\Tools\Binn\;C:\PROGRA~1\CA\SHARED~1\SCANEN~1;C:\PROGRA~1\CA\ETRUST~1;C:\Programme\Winzip\;C:\Programme\UltraEdit;C:\Programme\PerlIDE\;C:\Programme\Java\jdk1.6.0\bin;C:\Programme\CVSNTUSERNAME=N535835
OS=Windows_NT
PROCESSOR_IDENTIFIER=x86 Family 15 Model 4 Stepping 1, GenuineIntel



--------------- S Y S T E M ---------------

OS: Windows XP Build 2600 Service Pack 2

CPU:total 1 family 15, cmov, cx8, fxsr, mmx, sse, sse2

Memory: 4k page, physical 1038832k(327720k free), swap 1717436k(998512k free)

vm_info: Java HotSpot(TM) Client VM (1.6.0-b105) for windows-x86, built on Nov 29 2006 00:48:48 by "java_re" with unknown MS VC++:1310



REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
The main program:
================

import java.awt.event.*;
import java.awt.*;
import javax.swing.*;

class ThreadApp extends JFrame implements ActionListener, Runnable{
    JButton startButton = new JButton("Start");
    JButton stopButton = new JButton("Stop");
    JPanel mainPanel = new JPanel();

    private Thread runner;
    private boolean stopThread;

    Log log;

    public ThreadApp( Log log )
    {
        super("Thread App");

        this.log = log;


        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(300, 300, 150, 65);
        setResizable( false );

        startButton.addActionListener( this );
        stopButton.addActionListener( this );
        stopButton.setEnabled( false );

        mainPanel.add( startButton );
        mainPanel.add( stopButton );
        add( mainPanel );

        setVisible(true);
    }


    public void actionPerformed(ActionEvent evt)
    {
        Object source = evt.getSource();

        if ( source == startButton ) {
            startButton.setEnabled( false );
            stopButton.setEnabled( true );

            runner = new Thread( this );
            runner.start();

        } else if ( source == stopButton ) {
            stopButton.setEnabled( false );
            startButton.setEnabled( true );
            stopThread = true;
        }
    }

    public void run(){
        int timeCounter = 0;
        int errorStatus = 0;

        stopThread = false;

        while ( !stopThread && errorStatus == 0 ) {
            try{

                Thread.sleep( 1000 );
                errorStatus = log.getErrorStatus();

            } catch (InterruptedException ie) {
                // do nothing
            }
        }

        if ( errorStatus != 0 ) {
            JOptionPane.showMessageDialog( this,
                                          "Hiba!",
                                          "ThreadApp",
                                          JOptionPane.ERROR_MESSAGE
                                         );
        }

        stopThread = false;
    }

    public static void main(String[] arguments)
    {
       Log log = new Log();
       ThreadApp tanulo = new ThreadApp( log );
       log.done();
    }
}



The class for accessing the database:
==============================

import java.sql.*;

public class Log
{
    Connection conn;

    public Log() {
        try {
           Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
           conn = DriverManager.getConnection( "jdbc:odbc:Log", "", "");
        } catch ( ClassNotFoundException s ) {
               System.out.println( "Class not found: " + s.toString() );
        } catch ( SQLException s ){
               System.out.println( "SQL Error: " + s.toString() + " "
                                   + s.getErrorCode() + " " + s.getSQLState());
        }
    }

    public int getErrorStatus() {
       int status = 1;

       try {
          Statement st = conn.createStatement();
          System.out.println( "eddig" );
          ResultSet rec = st.executeQuery( "SELECT error FROM log" );
          while ( rec.next() ){
              status = rec.getInt( 1 );
          }
       } catch (SQLException s) {
             System.out.println( "SQL Error: "
                                 + s.toString()
                                 + " "
                                 + s.getErrorCode() + " " + s.getSQLState());
       }

       return status;
    }

    public void done() {
        try {
            conn.close();
        } catch ( SQLException s ){
            System.out.println( "SQL Error: " + s.toString() + " "
                                + s.getErrorCode() + " " + s.getSQLState());
        }
    }

/* public static void main( String[] args ) {
        Log log = new Log();
        System.out.println( log.getErrorStatus() );
        log.done();
    } */

}


---------- END SOURCE ----------