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ORA-7445 [kmnsbf()+84] Followed By ORA-600 [17147] in PMON Process Crashes the Instance (Doc ID 444470.1)

Last updated on APRIL 06, 2020

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.3 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Cloud Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Information in this document applies to any platform.

Symptoms

When using shared server processes on the instance a core dump is experienced and then it is followed by ORA-600 [17147] and instance crash.

Errors are similar to:
ORA-07445: exception encountered: core dump [kmnsbf()+84] [SIGBUS] [Invalid address alignment] [0x202066726F6D207B] [] []
ORA-00600: internal error code, arguments: [17147], [0x3B9ACF4A0], [], [], [], [], [], []
PMON: terminating instance due to error 472

Stack Trace from the 7445 is similar to:
ksedmp ssexhd sighndlr call_user_handler kmnsbf nsbfr nsiofrrg nsopen_shutitdown nsclose nsdisc kmddsl kmderr kmdu2s kmdmai kmmrdp

Changes

On shared server environment.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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