Listener Target Showing as Down in Grid Control When It Is Up With Error TNS-12541 TNS:No Listener
Last updated on JANUARY 02, 2015
Applies to:Enterprise Manager Base Platform - Version 10.2.0.2 to 184.108.40.206 [Release 10.2 to 11.1]
Information in this document applies to any platform.
Checked for relevance on 15-Feb-2013
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
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