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During Upgrade, DBUA Changes LOCAL_LISTENER Parameter Setting (Doc ID 737339.1)

Last updated on FEBRUARY 28, 2019

Applies to:

Oracle Net Services - Version to [Release 10.1 to 12.2]
Oracle Database - Enterprise Edition - Version and later
Information in this document applies to any platform.
This document describes a problem that can occur during a database upgrade where the DBUA can change the LOCAL_LISTENER.
It has been reported that it can also set LOCAL_LISTENER to null.


After upgrading the  Oracle database using DBUA, you find that the value for LOCAL_LISTENER has been changed in the pfile:  

For example, the parameter might have been changed from:




Note that it has been reported that DBUA has changed the LOCAL_LISTENER setting to NULL.

In addition, DBUA would have added a connect string to the local tnsnames.ora file that would make this value resolvable:


The DBUA upgrade log would have an entry similar to the following:


    [Thread-30] [9:37:0:605] [NetworkUtils.getOneLocalListenerProtocolAddress:2856]  Returning 
    [Thread-30] [9:37:0:606] [NetworkUtils.getOneLocalListenerProtocolAddress:2856]  Returning 
    [Thread-30] [9:37:0:606] []  Setting LISTENER_NAME=CYCLTEST, 
    LISTENER_HOME=/opt/oracle/10g2cyc02, REP_DB_PORT=1532, REP_DB_HOST=<HOSTNAME>, 

 DBUA is designed to use the tnsnames alias reference using the nomenclature "LISTENER_<sid>" rather than a full connect string for the LOCAL_LISTENER parameter. 

The goal of this Note is to answer the following questions:

1. What are the advantages of tnsnames.ora, over inline specification?
2. How to revert the changes done by DBUA to tnsnames.ora file?


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