Server is running NetWare 6.5 SP7. Out of the blue, it restarted.

I checked the abend log and I see this:
The first abend was not wrote in a file. The screen CIM (Compaq Insight Manager) has fixed the following:

Abend: DQ_DEQ would cause memory corruption. Running Procrss: Server 00:124. Code execuling in module COMN.NSS v3.26 at offset: +86c73h.

Abend.log (attach file):
Server CA halted Thursday, 18 March 2010 13:11:46.153
Abend 2 on P01: Server-5.70.07-1937: CPU Hog Detected by Timer

Registers:
CS = 0008 DS = 0010 ES = 0010 FS = 0010 GS = 0023 SS = 0010
EAX = FBF17BA3 EBX = 4B9AB140 ECX = 8AE03018 EDX = 0000003F
ESI = 000005EA EDI = 4B9AB168 EBP = BD9E3F54 ESP = BD9E3F40
EIP = 00000000 FLAGS = 00000046


Running process: Interrupt service routine (nested count 0)
Interrupted process: Server 01:71 Process
Thread Owned by NLM: SERVER.NLM
Stack pointer: BD9E4F40
OS Stack limit: BD9DD000
Scheduling priority: 67371008
Wait state: 50500F0 Waiting for work
Stack: --FBF17BA3 ?
8AD7B17B (LIBNSS.NLM|nssSpinLock+B)
8B058122 (NSS.NLM|NSSMPK_LockNss+62)
-8AE03018 (NSS.NLM|NSSMPK_spinlock+0)
--4B9AB140 ?
--BD9E4EE0 ?
8B173EF7 (NWSA.NSS|NSSCase89+17)