SAP - shutdown

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Hi,

We had our Production System went down suddenly. When I analyzed the log details. I found the following. I went manually using SIDADM and started the SAP. Now it is working. But i would like to know what had caused the sudden interruption. Can someone help us?

Mon Mar 1 04:01:17 2010

***LOG Q0E=> SigIGenAction, signal ( 33) [sigux.c 1067]

DpHalt: shutdown server >DBSERVER_UP1_00 < (normal)

DpModState: change server state from ACTIVE to SHUTDOWN

Stop work processes

Mon Mar 1 04:01:20 2010

Stop gateway

ERROR => DpProcKill: kill failed (3: No such process) [dpuxdisp.c 404]

Stop icman

Terminate gui connections

wait for end of work processes

waiting for termination of work processes ...

Mon Mar 1 04:01:23 2010

waiting for termination of work processes ...

Mon Mar 1 04:01:24 2010

Mon Mar 1 04:01:27 2010

waiting for termination of work processes ...

Mon Mar 1 04:01:28 2010

waiting for termination of work processes ...

DpStartStopMsg: send stop message (myname is >DBSERVER_UP1_00

<)

***LOG Q0I=> NiIWrite: writev (32: Broken pipe) [nixxi.cpp 3948]

ERROR => NiIWrite: SiSendV failed for hdl 3 / sock 12

(SI_ECONN_BROKEN/32; UD; ST; 192.168.102.244:3900) [nixxi.cpp 3948]

ERROR => MsINiWrite: NiBufSend (rc=NIECONN_BROKEN) [msxxi.c 2480]
ERROR => MsISnd2: MsINiWrite (rc=NIECONN_BROKEN) [msxxi.c 1438]

MBUF state OFF

MBUF component DOWN

ERROR => DpStartStopMsg: MsSnd2Type failed (rc=-100) [dpxxdisp.c 14285]
ERROR => MsIReceive: not_attached [msxxi.c 1201]
ERROR => MsISnd2: not_attached [msxxi.c 1321]
ERROR => DpHalt: MsSendKeepalive failed (-3) [dpxxdisp.c 10943]

detach from message server

cleanup EM

cleanup event management

cleanup shared memory/semaphores

Mon Mar 1 04:01:59 2010

removing request queue

***LOG Q05=> DpHalt, DPStop ( 618560) [dpxxdisp.c 11257]

shutdown completed - server stopped ***

=> Stack Trace:

DpHalt() at 0x101300f34

SigIGenAction() at 0x1000c1f04

Unknown at 0x44a4

!!! Invalid stack address encountered: 0x0

!!! Stack corrupted.