EM 12c: Listeners Are Suddenly Showing Down Without Any Reason (Doc ID 1966098.1)

Last updated on MARCH 08, 2017

Applies to:

Enterprise Manager for Oracle Database - Version 12.1.0.4.0 to 12.1.0.7.0 [Release 12.1]
Information in this document applies to any platform.

Symptoms

All listeners were working fine but suddenly they shows down with the following error:

Although a Listener with name "LISTENER", is running on this host at port: "nnnn", it was not started using this target's "LISTENER.ORA" file. CORRECTIVE ACTION: To monitor this "EM  Listener Target" with its present configuration, you must stop the currently running listener process, and start it again using the Listener Parameter file: oracle_home/network/admin/listener.ora . Alternatively, you can update this target's "LISTENER.ORA Location" parameter with the location of the currently running Listener, which was started using:oracle_home/network/admin/listener.ora.

or

The following  alert is sent:

The LISTENERNAME  is down: LISTENERNAME not found in <directory>

gcagent.lg shows

2015-01-29 11:25:39,767 [1068:8F50FC3F:GC.DPExecutor.12 (CDynamic:oracle_listener.LISTENER_name)] INFO - Loading target: [oracle_listener.LISTENER_name$8] dynamic info
2015-01-29 11:25:40,163 [35:2BCC238C] INFO - Unsuspended 5 collections for target [oracle_listener.name] because of static properties change


Cause

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