ORA-07445: [ACCESS_VIOLATION] [unable_to_trans_pc] [PC:0x609C6FA2] [ADDR:0x79A0040] [UNABLE_TO_READ] (Doc ID 1302890.1)

Last updated on DECEMBER 22, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.2 to 10.2.0.2 [Release 10.2]
Oracle Database - Enterprise Edition - Version 11.2.0.4 to 11.2.0.4 [Release 11.2]
Information in this document applies to any platform.
*** Checked for relevance on 26-Apr-2013 ***

Symptoms

We might see the following errors in alert.log:

ORA-07445: exception encountered: core dump [ACCESS_VIOLATION] [unable_to_trans_pc] [PC:0x609C6FA2] [ADDR:0x79A0040] [UNABLE_TO_READ] []

The error might occur during a select with bind variables.

In the trace file generated by the error, in Call Stack Trace section we see the following functions:

_clscugblmterm -> _clsc_term -> _clscterm -> _prom_terminate

-AND/OR-

malloc -> _malloc_unlocked -> cleanfree -> realfree

Note: clscugblmterm is a RAC function, however in the case of this bug, the instances ARE NOT RAC.

Cause

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