TNS-01106: Lsnrctl Utility Fails to Start a Second Listener

(Doc ID 352143.1)

Last updated on FEBRUARY 24, 2016

Applies to:

Oracle Net Services - Version to [Release 10.2 to 12.1]
Information in this document applies to any platform.


Lsnrctl start fails with the following error:

TNS-01106: Listener using listener name LISTENER has already been started.

The listener.ora file might be configured with a duplicate IPC KEY or a duplicate TCP port number. 
If the TCP Address configuration shows a HOST field containing a hostname, versus an IP address,
this error would still be expected.


For example:



Attempting to start both listeners configured like this would yield a TNS-01106 TNS:  Listener using listener name % has already been started.


 This is likely a new installation OR the addition of a new listener on this server.


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