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ORA-12547 connecting to sqlplus '/ as sysdba' on AIX (Doc ID 372143.1)

Last updated on JANUARY 30, 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 Cloud Exadata Service - Version N/A and later
IBM AIX on POWER Systems (64-bit) Oracle on IBM AIX 5L


- A sqlplus connection with '/ as sysdba' is producing ORA-12547 or TNS-12547:

SQL*Plus: Release - Production on Tue May 16 14:10:19 2006

Copyright (c) 1982, 2005, Oracle. All Rights Reserved.

ORA-12547 : TNS:lost contact

- A truss is producing error 0915-015 Cannot create subject process:

truss -fae -o trace.truss sqlplus "/as sysdba"
truss: 0915-015 Cannot create subject process.
wait4all: i: 0, status: 589833, pid: 13729998, created: 0

- An Oracle trace file might also be generated with the next messages:

*** 2008-01-17 16:09:38.291
kgepop: no error frame to pop to for error 27141
*** 2008-01-17 16:09:38.291
ksedmp: internal or fatal error 

ORA- 27141 is:

Error: ORA-27141
Text: invalid process ID
Cause: process operation attempted using invalid process ID


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