Listener Target Showing as Down in Grid Control When It Is Up With Error TNS-12541 TNS:No Listener

(Doc ID 403272.1)

Last updated on JANUARY 02, 2015

Applies to:

Enterprise Manager Base Platform - Version 10.2.0.2 to 11.1.0.1 [Release 10.2 to 11.1]
Information in this document applies to any platform.
Checked for relevance on 15-Feb-2013

Symptoms

Grid Control shows a listener target, monitored by an Oracle Management Agent as down even though it is up.

The Listener can even be successfully restarted from Enterprise Manager but still be reported as down.

The Response Metric/Alert shows the error :

The listener is down: TNS-12541: TNS:no listener

Cause

Sign In with your My Oracle Support account

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

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms