11.2: ORA-07445 [kglbrk] In Shared Server Process
(Doc ID 1533257.1)
Last updated on FEBRUARY 28, 2019
Applies to:
Oracle Database - Standard Edition - Version 11.2.0.2 to 11.2.0.3 [Release 11.2]Oracle Database Backup Service - Version N/A and later
Oracle Database Cloud Service - Version N/A and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
Symptoms
In a RDBMS 11.2.0.2 or 11.2.0.3 database with shared server configuration, the following errors can be seen in the alert log file:
ORA-07445: exception encountered: core dump [kglbrk()+45] [SIGSEGV] [ADDR:0x30] [PC:0x93845E9] [Address not mapped to object]
or
ORA-7445: exception encountered: core dump [kglbrk()+44] [SIGSEGV] [ADDR:0x30] [PC:0x1085955EC] [Address not mapped to object] []
or
ORA-600: internal error code, arguments: [kglUnLock-bad-lock], [0x700000A09923FC8], [0], [0x7000009E8D9B330], [], [], [], [], [], [], [], [
According to incident file generated by errors:
The current session was recently idle sniped (the KSUSFTBD bit is set). For example:
(session) sid: 1437 ser: 19495 trans: (nil), creator: 0x3e463e998
flags: (0x81002e5) USR/- flags_idl: (0x2) -/TBD/-/-/-/-
^^^--- flags here
...
Cleanup details:
Marked killed = 1 min 51 sec ago
(session) sid: 1437 ser: 19495 trans: (nil), creator: 0x3e463e998
flags: (0x81002e5) USR/- flags_idl: (0x2) -/TBD/-/-/-/-
^^^--- flags here
...
Cleanup details:
Marked killed = 1 min 51 sec ago
The errors are occurring in shared servers processes:
This can be checked by looking at the trace file name: <instance_name>_s001_<process>_i<incident>.trc.
*_s001_* tells us this is a tracefile generated by a shared server process.
*_s001_* tells us this is a tracefile generated by a shared server process.
The call stack includes ksu_dispatch_tac, and might look similar to:
kglbrk <- kxsGetCursorStatus <- kxsFreeInactiveCursors <- ksu_dispatch_tac
Changes
Cause
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In this Document
Symptoms |
Changes |
Cause |
Solution |
References |