I have NW6.0.3 server that has abended the following times;

08-15-2005 @ 05:01:47 AM
08-22-2005 @ 05:01:45 AM
08-29-2005 @ 05:01:47 AM

Prior to these 3 abends the server has not abended since 07-05-2005 due to
a corruption in BorderManager FILTSRV. I know I need to be at SP5, but the
fact is I want to know what this process is so I can be informed in case it
happens again. I also would like to know why the server just suddenly
started abending on Monday mornings at 0501 AM. Here is an excerpt of the
last abend and the other 2 look similar. What is the reaperthread process?

Server MGC-COMM halted Monday, August 29, 2005 5:01:47.904 am
Abend 1 on P00: Server-5.60.03-0: Free detected corrupt preceding redzone
for node 0xB8B6E500

Registers:
CS = 0008 DS = 0010 ES = 0010 FS = 0010 GS = 0010 SS = 0010
EAX = D0A49F00 EBX = B8B6E500 ECX = 00000000 EDX = D0A49ED4
ESI = FCE15B1D EDI = 00016FA1 EBP = 00000003 ESP = D0A49EFC
EIP = 0065972B FLAGS = 00000202
0065972B 83C404 ADD ESP,00000004
EIP in SERVER.NLM at code start +0005972Bh

The violation occurred while processing the following instruction:
0065972B 83C404 ADD ESP,00000004
0065972E 81C4A4000000 ADD ESP,000000A4
00659734 5D POP EBP
00659735 5F POP EDI
00659736 5E POP ESI
00659737 5B POP EBX
00659738 C3 RET
00659739 8B9424B8000000 MOV EDX,[ESP+000000B8]
00659740 8B5AF8 MOV EBX,[EDX-08]
00659743 83EA08 SUB EDX,00000008



Running process: ReaperThread Process
Thread Owned by NLM: SERVER.NLM
Stack pointer: D0A49F98
OS Stack limit: D0A46040
Scheduling priority: 67371008
Wait state: 5050060 Blocked on a Queue
Stack: --D0A49F00 ?
--65657246 ?
--74656420 ?
--65746365 ?
--6F632064 ?
--70757272 ?
--72702074 ?
--64656365 ?
--20676E69 ?
--7A646572 ?
--20656E6F ?
--20726F66 ?
--65646F6E ?
--42783020 ?
--45364238 ?
--00303035 ?
--19D021A0 (IDEATA.HAM|firstMode+B1AE)
D083C19C (NWPA.NLM|ScheduleAnotherMessage+3C)
--19D021A0 (IDEATA.HAM|firstMode+B1AE)