Lsnrctl Status shows TNS-12541 "no Listener" after a few days on Linux 64 Bit but Listener is still running (Doc ID 2251039.1)

Last updated on APRIL 03, 2017

Applies to:

Oracle Net Services - Version 12.1.0.2 and later
Generic Linux

Symptoms

After a few days of starting the TNS Listener, running "lsnrctl status" does not work.

 

Initial start:

 

 
Connections are working through this listener and ps -ef |grep tnslsnr shows the listener is running.

The Listener cannot be stopped and the process itself has to be killed.

Changes

 This may be a new installation on Linux (for example, Redhat 7) when an original installation on Redhat 5 was working without issues.

Cause

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