Troubles with JRE 1.4.2 and iReport (with db2 connection)

Hello everyone. My company is developing a product, and the client is working with JRE 1.4.2 . They (the client) are using db2 Database. We are using iReport to generate the product reports, but we encounter a problem with it - the report will compile and report (in any format) only once - afterwards, iReport will suddenly freeze and will stop to respond.
Trying the same thing with JRE 5.0 worked perfectly, with not troubles at all (but we cannot ask our client to upgrade to JRE 5.0, of course)
Anyone has any idea about how to fix this problem? perhaps there's a patch or something of the sort?
I forgot to mention, there's no error message at all, and if any, it's a javaw.exe application hang.
Any idea's?
Thanks,
Matt.

Have you tried this on another machine?Yes ... actually this has happened on a few workstations here ... all of them are Pentium IV based dell workstations running Windows 2000.
What exact version of 1.4.2 did you download?Java(TM) Plug-in: Version 1.4.2_04
Using JRE version 1.4.2_04 Java HotSpot(TM) Client VM
Have you searched the bug database? This one could be related to yours:
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4673572
This sounds similar but the difference is its not just the app that feezes up (so that you could do an alt+ctrl+del and kill it)..... the OS freezes up and you can move the mouse around still the system even queu e is not full and eventuall all I hear is the beeping. At this point I've to power cycle.
Is there any way you could post the code or is it too big? Or, have you tried just creating a very small >application or applet that just shows one dialog, and if so, does that show the same problem? (What I'm >trying to get at here is - is it something in your code that is causing this, or something in the JRE, or >perhaps something to do with your machine's configuration/OS?)Unfortunately I cannot post the code ... its company rules and regulations. I've tried creating a very small app and it appears to work ok .... but randomly causes this freeze up. There is no definate pattern (except that it happens when you move around a JDialog or a JInternalFrame) . It could freeze up some time and work perfectly fine at other times. It has actually happened on other applications too (Netbeans, JEdit etc). That's why I suspect this might be a obscure bug in the JRE.
I'll try to find a pattern so that it can be re-produced by everyone.
Thanks for the help.

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# A fatal error has been detected by the Java Runtime Environment:
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x6d979ba7, pid=10932, tid=12276
# JRE version: 6.0_18-b07
# Java VM: Java HotSpot(TM) Client VM (16.0-b13 mixed mode, sharing windows-x86 )
# Problematic frame:
# V [jvm.dll+0x179ba7]
# 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 (0x02afa800): VMThread [stack: 0x02be0000,0x02c30000] [id=12276]
siginfo: ExceptionCode=0xc0000005, reading address 0x706d7953
Registers:
EAX=0x706d7953, EBX=0x00000000, ECX=0x37387a88, EDX=0x00000000
ESP=0x02c2f79c, EBP=0x02c2f7ac, ESI=0x00000080, EDI=0x02bc7460
EIP=0x6d979ba7, EFLAGS=0x00010246
Top of Stack: (sp=0x02c2f79c)
0x02c2f79c: 02c2f890 373851d0 02c2fa8c 02bc7464
0x02c2f7ac: 02c2f7c4 6d8d8c66 02afaab4 00000000
0x02c2f7bc: 02c2f7f8 37387a88 02c2f7dc 6d96b704
0x02c2f7cc: 02afaab4 00000000 02c2f7f8 02afaab0
0x02c2f7dc: 02c2f840 6d8b3449 00000000 02c2f7f8
0x02c2f7ec: 05b30400 02c2f890 00000001 00000000
0x02c2f7fc: 02c20000 0000ffff 00000000 00000000
0x02c2f80c: 00000000 6da187a4 02c2f890 02c2fa8c
Instructions: (pc=0x6d979ba7)
0x6d979b97: 80 79 05 48 83 c8 e0 40 8d 1c 40 8b 07 8d 04 d8
0x6d979ba7: 39 08 75 09 0f b7 58 04 3b 5d 0c 74 34 42 83 fa
Stack: [0x02be0000,0x02c30000], sp=0x02c2f79c, free space=13d02c2f310k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [jvm.dll+0x179ba7]
V [jvm.dll+0xd8c66]
V [jvm.dll+0x16b704]
V [jvm.dll+0xb3449]
V [jvm.dll+0xb3562]
V [jvm.dll+0x1db5f5]
V [jvm.dll+0x1db9ca]
V [jvm.dll+0x1a1af4]
V [jvm.dll+0xc834f]
V [jvm.dll+0xa443c]
V [jvm.dll+0xc9398]
V [jvm.dll+0x7e7cb]
V [jvm.dll+0x1f442b]
V [jvm.dll+0x1f6ed3]
V [jvm.dll+0x1f615e]
V [jvm.dll+0x1f64ac]
V [jvm.dll+0x1f68d2]
V [jvm.dll+0x17f9cc]
C [msvcr71.dll+0x9565]
C [kernel32.dll+0xb50b]
VM_Operation (0x0a09e2dc): GenCollectForAllocation, mode: safepoint, requested by thread 0x05c54800
--------------- P R O C E S S ---------------
Java Threads: ( => current thread )
0x05b30400 JavaThread "persistance manager service activator" daemon [_thread_blocked, id=6588, stack(0x0a230000,0x0a280000)]
0x05b38400 JavaThread "task queue worker" daemon [_thread_blocked, id=9788, stack(0x0a1e0000,0x0a230000)]
0x05c5b800 JavaThread "PSJ-Subsystem" [_thread_blocked, id=11024, stack(0x0a140000,0x0a190000)]
0x05c5a400 JavaThread "HDM-Subsystem" [_thread_blocked, id=8296, stack(0x0a0f0000,0x0a140000)]
0x05c61000 JavaThread "CSM-Subsystem" [_thread_blocked, id=5272, stack(0x0a0a0000,0x0a0f0000)]
0x05c54800 JavaThread "XPS-Subsystem" [_thread_blocked, id=10064, stack(0x0a050000,0x0a0a0000)]
0x05c59400 JavaThread "GUI-Subsystem" [_thread_blocked, id=7596, stack(0x0a000000,0x0a050000)]
0x05c5f800 JavaThread "TimerServices" [_thread_blocked, id=5760, stack(0x09fb0000,0x0a000000)]
0x05af9800 JavaThread "Thread-2" [_thread_in_native, id=11624, stack(0x03d30000,0x03d80000)]
0x02b0b000 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=8092, stack(0x02dc0000,0x02e10000)]
0x02b07c00 JavaThread "CompilerThread0" daemon [_thread_blocked, id=2696, stack(0x02d70000,0x02dc0000)]
0x02b06400 JavaThread "Attach Listener" daemon [_thread_blocked, id=1444, stack(0x02d20000,0x02d70000)]
0x02b05000 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=10896, stack(0x02cd0000,0x02d20000)]
0x02afd000 JavaThread "Finalizer" daemon [_thread_blocked, id=8084, stack(0x02c80000,0x02cd0000)]
0x02afbc00 JavaThread "Reference Handler" daemon [_thread_blocked, id=10636, stack(0x02c30000,0x02c80000)]
0x002a7000 JavaThread "MasterControl" [_thread_blocked, id=11412, stack(0x008c0000,0x00910000)]
Other Threads:
=>0x02afa800 VMThread [stack: 0x02be0000,0x02c30000] [id=12276]
0x02b0d000 WatcherThread [stack: 0x02e10000,0x02e60000] [id=11048]
VM state:at safepoint (normal execution)
VM Mutex/Monitor currently owned by a thread: ([mutex/lock_event])
[0x002a61c0] Threads_lock - owner thread: 0x02afa800
[0x002a65d0] Heap_lock - owner thread: 0x05c54800
Heap
def new generation total 4928K, used 4783K [0x22970000, 0x22ec0000, 0x27ec0000)
eden space 4416K, 100% used [0x22970000, 0x22dc0000, 0x22dc0000)
from space 512K, 71% used [0x22dc0000, 0x22e1bf30, 0x22e40000)
to space 512K, 0% used [0x22e40000, 0x22e40000, 0x22ec0000)
tenured generation total 10944K, used 697K [0x27ec0000, 0x28970000, 0x32970000)
the space 10944K, 6% used [0x27ec0000, 0x27f6e4e0, 0x27f6e600, 0x28970000)
compacting perm gen total 12288K, used 5037K [0x32970000, 0x33570000, 0x36970000)
the space 12288K, 40% used [0x32970000, 0x32e5b4c8, 0x32e5b600, 0x33570000)
ro space 10240K, 51% used [0x36970000, 0x36e97b58, 0x36e97c00, 0x37370000)
rw space 12288K, 54% used [0x37370000, 0x37a04ce0, 0x37a04e00, 0x37f70000)
Dynamic libraries:
0x00400000 - 0x00424000      c:\windows\system32\java.exe
0x7c900000 - 0x7c9b0000      C:\WINDOWS\system32\ntdll.dll
0x7c800000 - 0x7c8f4000      C:\WINDOWS\system32\kernel32.dll
0x77dd0000 - 0x77e6b000      C:\WINDOWS\system32\ADVAPI32.dll
0x77e70000 - 0x77f01000      C:\WINDOWS\system32\RPCRT4.dll
0x7c340000 - 0x7c396000      C:\Program Files\Java\jre6\bin\msvcr71.dll
0x6d800000 - 0x6da97000      C:\Program Files\Java\jre6\bin\client\jvm.dll
0x77d40000 - 0x77dd0000      C:\WINDOWS\system32\USER32.dll
0x77f10000 - 0x77f57000      C:\WINDOWS\system32\GDI32.dll
0x76b40000 - 0x76b6d000      c:\windows\system32\WINMM.dll
0x6d7b0000 - 0x6d7bc000      C:\Program Files\Java\jre6\bin\verify.dll
0x6d330000 - 0x6d34f000      C:\Program Files\Java\jre6\bin\java.dll
0x6d290000 - 0x6d298000      C:\Program Files\Java\jre6\bin\hpi.dll
0x76bf0000 - 0x76bfb000      c:\windows\system32\PSAPI.DLL
0x6d7f0000 - 0x6d7ff000      C:\Program Files\Java\jre6\bin\zip.dll
0x6d610000 - 0x6d623000      C:\Program Files\Java\jre6\bin\net.dll
0x71ab0000 - 0x71ac7000      c:\windows\system32\WS2_32.dll
0x77c10000 - 0x77c68000      C:\WINDOWS\system32\msvcrt.dll
0x71aa0000 - 0x71aa8000      c:\windows\system32\WS2HELP.dll
0x6d630000 - 0x6d639000      C:\Program Files\Java\jre6\bin\nio.dll
0x02eb0000 - 0x02f59000      C:\mod_s14\bin\stlport.5.2.dll
0x7c3a0000 - 0x7c41b000      c:\windows\system32\MSVCP71.dll
[snip]
--------------- S Y S T E M ---------------
OS: Windows XP Build 2600 Service Pack 2
CPU:total 2 (2 cores per cpu, 1 threads per core) family 6 model 15 stepping 2, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3
Memory: 4k page, physical 2094652k(589592k free), swap 4032296k(2558960k free
vm_info: Java HotSpot(TM) Client VM (16.0-b13) for windows-x86 JRE (1.6.0_18-b07), built on Dec 17 2009 13:35:55 by "java_re" with MS VC++ 7.1 (VS2003)

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