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ORA-07445 [gsignal()+53] While Using Shared Server with Dead Connection Detection (Doc ID 1998589.1)

Last updated on FEBRUARY 20, 2019

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 11.2]
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.


The following error is reported in the database alert.log:

ORA-07445: exception encountered: core dump [gsignal()+53] [SIGIOT] [ADDR:0x26F00006E06] [PC:0x3DAF42FFC5] [unknown code] []

The alert log also shows messages like 'dead shared server..', e.g.:

Process 0x0x1a612e27c8 appears to be hung while dumping
Current time = 936727454, process death time = 936663713 interval = 60000
Attempting to kill process 0x0x1a612e27c8 with OS pid = 24628
OSD kill succeeded for process 0x1a612e27c8
found dead shared server 'S015', pid = (39, 82)

The call stack from the shared server incident trace file written by the error includes the following functions:

... gsignal abort libc_message int_free cfree nadisc nsnadisc nsclose nioqds upidhs kpudtch OCIServerDetach kfnDisconnectPriv kfnTryDestroyConn ksu_dispatch_tac kmcgms kmcdget kmcdrcv opikndf2 opitsk opiino ...





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