Unstable Server kernel 2.2.14 and NFS

From: Deven.Phillips@webmail.hnl.viata.com, CISSP (Deven.Phillips@webmail.hnl.viata.com)
Date: Mon Jun 05 2000 - 15:41:48 EST

To Whom it may concern,

        We run a homogeneous Linux network, currently two servers, 1 router, 45
workstations. We run our /home off of a Linux NFS server with the following
specs:

        SuperMicro PIIIDME M/B
        Dual PIII 550MHz
        1GB ECC PC100 SDRAM
        1 Adaptec 29160 ULTRA160 Controller
        1 AMI MegaRAID controller
        1 System Drive - IBM 7200RPM SCSI2 on Adaptec Card
        4 Data Drives - RAID5 on the MegaRAID
        1 Davicom 10/100 Ethernet Card
        1 Matrox G400 32MB Video Card
        1 Plextor 8x20 CD-R

        I am running Mandrake 7.0 w/ kernel 2.2.14

        Services on this server:
                NFS
                Sendmail
                YPServ
                YPPasswdd
                IMAP
                Samba

Problem Description:

        At unpredictable intervals the server crashes without warning. Usually the
load on the server is minimal. Most of the time, I get no information in the
system logs. The most recent crash actually made me happy in that it spit out
the following Stack Trace.

<BEGIN STACK TRACE>
Unable to handle kernel NULL pointer dereference at virtual address 00000018
current->tss.cr3=00101000,cr3=00101000
*pde = 00000000
Oops: 0000
CPU: 1
EIP: 0010:[<01145a0>]
EFLAGS: 00010207
eax: 00000000 ebx: c0258000 ecx: cfa18000 edx: 00000000 esi: fbfa4000
edp: fbfa5f80 esp: fbfa5f60 ds: 0018 es: 018 ss: 0018
Process swapper (pid:0, process nr: 1, stackpage = fbfa5000)
Stack:
00000000 00000000 00000000 00000080 00000018 00000004 00000001 c0273c20
00000000 c0108814 00000000 00000000 00000000 00000000 00000000 00000000
00000018 c025fb27 00000000 c025fb14 00000010 00000246 00000000 00000000
Call Trace:
[<00000000>][<00000000>][<00000000>][<00000080>]
[<00000018>][<00000004>][<00000001>][<00000000>]

[<00000000>][<c0108814>][<00000000>][<00000000>]
[<00000000>][<00000000>][<00000000>][<00000000>]

[<00000018>][<00000000>][<00000010>][<00000246>]
[<00000000>][<00000000>][<00000000>][<c10b0b87>]

[<00000282>][<00000001>][<00000001>][<00000010>]
[<00000000>][<000001ff>][<00000000>][<00000282>]

CODE: 8b 42 18 c1 f8 01 03 42 1c 89 42 18 8b 52 34 81 fa 00 80 25

Kernel Panic: Attempted to kill the idle task!
Uanble to handle kernel NULL pointer dereference.
<END STACK TRACE>

Is this a hardware issue, or am I running come conflicting services, or
what???

Any help in making our file server more stable is very appriciated. 

-- 
Security Officer
Viata Online, Inc.

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This archive was generated by hypermail 2b29 : Wed Jun 07 2000 - 21:00:22 EST