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

Last updated on MARCH 08, 2017

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

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