My Oracle Support Banner

TNS-12521 On listener.log Coming From (PROGRAM=OMS) (Doc ID 2005683.1)

Last updated on OCTOBER 15, 2018

Applies to:

Enterprise Manager for Oracle Database - Version 12.1.0.3.0 and later
Information in this document applies to any platform.

Symptoms

Listener.log shows the following errors:

2015-04-08 07:35:23.666000 -05:00
TNS-12521: TNS:listener does not currently know of instance requested in connect descriptor
ADR Home = /u26/app/grid/diag/tnslsnr/snnnnnn/listener_network2:
TNS-01190: The user is not authorized to execute the requested listener command

08-APR-2015 07:35:30 * (CONNECT_DATA=(CID=(PROGRAM=OMS)(HOST=__jdbc__)(USER=oracle))(instance_name=ORCL1)(service_name=ORCL1)) * (ADDRESS=(PROTOCOL=tcp)(HOST=hostname)(PORT=1521)) * establish * ORCL1 * 12521
TNS-12521: TNS:listener does not currently know of instance requested in connect descriptor

Database Alert Log shows:

Fatal NI connect error 12170.

  VERSION INFORMATION:
    TNS for Linux: Version 11.2.0.3.0 - Production
    Oracle Bequeath NT Protocol Adapter for Linux: Version 11.2.0.3.0 - Production
    TCP/IP NT Protocol Adapter for Linux: Version 11.2.0.3.0 - Production
  Time: 07-APR-2015 05:38:54
  Tracing not turned on.
  Tns error struct:
    ns main err code: 12535
    
TNS-12535: TNS:operation timed out
    ns secondary err code: 12560
    nt main err code: 505
    
TNS-00505: Operation timed out
    nt secondary err code: 110
    nt OS err code: 0
  Client address: (ADDRESS=(PROTOCOL=tcp)(HOST=hostname)(PORT=11429))
Tue Apr 07 07:15:43 2015

Cause

To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!


In this Document
Symptoms
Cause
Solution


This document is being delivered to you via Oracle Support's Rapid Visibility (RaV) process and therefore has not been subject to an independent technical review.
My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.