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Multi-threaded OCCI / OCI App Crashes (SIGSEGV) in __NPTL_DEALLOCATE_TSD (Doc ID 1395459.1)

Last updated on FEBRUARY 03, 2022

Applies to:

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

A multi-threaded (pthread) OCCI program which calls an OCI program to connect to Oracle to perform DML, crashes with SIGSEGV (Segmentation fault) after upgrading from 10.2 to  The crash happens in __nptl_deallocate_tsd () from /lib/

The crash only appears to occur on Linux (32/64bit) with the gcc compiler version 4.x.


The issue reproduces on Oracle version and
The issue does not reproduce on Oracle version or 10g


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