Doc ID: Note:278302.1
Subject: ORA-07445 OCCURS DURING SHUTDOWN OPERATION IN FUNCTIONS KPOGUP OR LMXSPAX
Content Type: TEXT/X-HTML
Creation Date: 13-JUL-2004
Last Revision Date: 20-AUG-2004
The following errors have all been observed for the this issue:-
ORA-07445[SIGSEGV] [ADDRESS NOT MAPPED TO OBJECT]
All of the following symptoms will be observed
a) The failing functions KPOGUP or LXMSPAX will be reported in the 7445 error and the function KPOGUP will be reported in the stack trace OR (b)
b) The failing function KPOGUP will be reported in the stack trace and the 7445 error will contain SIGSEGV
c) The ORA-07445 will be reported after a SHUTDOWN IMMEDIATE operation.
d) The current SQL session will report : Current SQL information unavailable - no session.
e) Crash/Media recovery is not affected on startup
The stack will be similar to:-
sigacthandler kpogup kpofli kpolon opiodr ttcpip opitsk opiino opiodr opidrv
sou2o main start
ksedmp ssexhd sigacthandler lxmspax kpogup kpofli kpolon opiodr ttcpip opitsk
opiino opiodr opidrv sou2o main start
The key function that needs to be present in the stack trace is KPOGUP
The root cause of the problem relates to which addresses an issue in accessing
NLS object list information during SHUTDOWN IMMEDIATE. There is no impact to the database
other than a 7445 trace file taking space on disk.
The fix is provided in Oracle10g but due to the architectural changes required is not backportable to earlier releases. There is no recommended workaround for this error as it has no impact to the database and no known set of circumstances that avoid/cause it.
<BUG:2295368> - Race Condition In Shutdown Immediate And Nls/Sga Fetch
<BUG:2554103> - Ora-07445 Dump [Lxmspax()+40] [Sigsegv] [Address Not Mapped To Object] With Oex