Application Using OCI/OCCI Libraries Are Unable to Handle Interrupted System Calls(EINTR) Resulting in Hang or Crash Intermittently (Doc ID 2709607.1)

Last updated on APRIL 17, 2023

Applies to:

Symptoms

A C++ application manipulating BLOB data using OCCI APIs either hangs or crashes with ORA-03113/ORA-12552/ORA-12592 error intermittently. The issue is observed only when the application is interrupted by a signal(e.g. SIGUSR1) while the underlying libraries are making read/write calls at OS level. The 'strace' output of the failing process shows the OCI library function cannot handle EINTR.

Changes

The code is executed for the first time using RDBMS Client version 12.1 connecting to a 12.2 database(RAC) using SCAN listener. The issue is observed with Client version 12.2 also.

Cause

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