Listener Fails to Start and Reports Error TNS-12542 Address Already in Use (Doc ID 1107064.1)

Last updated on OCTOBER 09, 2016

Applies to:

Oracle Net Services - Version 9.2.0.8 to 11.2.0.3 [Release 9.2 to 11.2]
Oracle Net Services - Version 12.1.0.2 to 12.1.0.2 [Release 12.1]
Oracle Net Services - Version 11.2.0.4 to 11.2.0.4 [Release 11.2]
Information in this document applies to any platform.

Symptoms

The listener fails to start and the following error stack is thrown at the Lsnrctl utility prompt:

 

Error: ORA-12542 / TNS-12542
Text: TNS:address already in use

 

Changes

This may be a new installation or the listener.ora file has been edited manually since the last listener restart.

Cause

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