TNS-01151: Missing listener name, LISTENER_SCAN3, in LISTENER.ORA

I got ” TNS-01151: Missing listener name, LISTENER_SCAN3, in LISTENER.ORA ”  error in Oracle database.

TNS-01151: Missing listener name, LISTENER_SCAN3, in LISTENER.ORA

Details of error are as follows.

TNS-01151: Missing listener name, LISTENER_SCAN3, in LISTENER.ORA

Cause:  The listener could not find the listener name specified.

Action:  Make sure valid addresses on which to listen are specified for the listener
 name in LISTENER.ORA.

Missing listener name, LISTENER_SCAN3, in LISTENER.ORA

This TNS-01151 error is related to the listener could not find the listener name specified.

Check the listener.ora ( under $ORACLE_HOME/network/admin ) and Make sure valid addresses on which to listen are specified for the listener name in LISTENER.ORA.

If invalid adresses exist in listener.ora, then fix them and start it as follows.

[oracle@msdbadm01 ~]$ lsnrctl start LISTENER

[oracle@msdbadm01 ~]$ lsnrctl status

LSNRCTL for Linux: Version 18.0.0.0.0 - Production on 28-APR-2020 15:44:29

Copyright (c) 1991, 2019, Oracle. All rights reserved.

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 18.0.0.0.0 - Production
Start Date 25-MAR-2020 20:34:20
Uptime 33 days 19 hr. 10 min. 8 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/grid/network/admin/listener.ora
Listener Log File /u01/app/grid/diag/tnslsnr/vfxidb01/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.63.34)(PORT=1521)))
Services Summary...
Service "+APX" has 1 instance(s).
Instance "+APX1", status READY, has 1 handler(s) for this service...
Service "+ASM" has 1 instance(s).
Instance "+ASM1", status READY, has 1 handler(s) for this service...
Service "+ASM_DATA" has 1 instance(s).
Instance "+ASM1", status READY, has 1 handler(s) for this service...
Service "+ASM_RECO" has 1 instance(s).
Instance "+ASM1", status READY, has 1 handler(s) for this service...
Service "MSDB" has 1 instance(s).
Instance "MSDB1", status READY, has 1 handler(s) for this service...
Service "MSDBXDB" has 1 instance(s).
Instance "MSDB1", status READY, has 1 handler(s) for this service...

[oracle@msdbadm01 ~]$

OR

If you got this error for LISTENER_SCAN3, then add the following entry to the listener.ora, then try again.

listener_scan3=
(description=
(
address=(protocol=tcp)
(host=HOSTNAME)
(port=1521)
)

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