Lsnrctl is very slow and possibly TNS-12537: TNS:connection closed in Alert log (Doc ID 2135131.1)

Last updated on MAY 06, 2016

Applies to:

Oracle Net Services - Version 11.2.0.4 and later
Information in this document applies to any platform.

Symptoms

When issuing "lsnrctl status" against any listener, the result is delayed by about 45 (or so) seconds.
A Listener trace, may reveal a "resource" limitation and delays with Network or Socket communications:

 

 

Cause

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