TNS-12541: TNS:no listener
During tnsping, the following error is expected if the source listener is not running.
[oracle@xhydra dbs]$ tnsping db9zx
TNS Ping Utility for Linux: Version 19.0.0.0.0 - Production on 17-JUN-2023 07:32:39
Copyright (c) 1997, 2019, Oracle. All rights reserved.
Used parameter files:
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = <host>)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = db9zx)))
TNS-12541: TNS:no listener
Error utility says the following.
[oracle@xhydra dbs]$ oerr ora 12541
12541, 00000, "TNS:no listener"
// *Cause: The connection request could not be completed because the listener
// is not running.
// *Action: Ensure that the supplied destination address matches one of
// the addresses used by the listener - compare the TNSNAMES.ORA entry with
// the appropriate LISTENER.ORA file (or TNSNAV.ORA if the connection is to
// go by way of an Interchange). Start the listener on the remote machine.
Start the listener in source.
[oracle@xhydra ~]$ lsnrctl start
LSNRCTL for Linux: Version 19.0.0.0.0 - Production on 17-JUN-2023 07:33:14
Copyright (c) 1991, 2019, Oracle. All rights reserved.
Starting /u01/app/oracle/product/19.0.0/dbhome_1/bin/tnslsnr: please wait...
TNSLSNR for Linux: Version 19.0.0.0.0 - Production
System parameter file is /u01/app/oracle/product/19.0.0/dbhome_1/network/admin/listener.ora
Log messages written to /u01/app/oracle/diag/tnslsnr/xhydra/listener/alert/log.xml
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=xhydra)(PORT=1521)))
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=xhydra)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 19.0.0.0.0 - Production
Start Date 17-JUN-2023 07:33:14
Uptime 0 days 0 hr. 0 min. 0 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/oracle/product/19.0.0/dbhome_1/network/admin/listener.ora
Listener Log File /u01/app/oracle/diag/tnslsnr/xhydra/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=xhydra)(PORT=1521)))
The listener supports no services
The command completed successfully
Tnsping works perfectly.
SERVICE_NAME = db9zx)))
OK (510 msec)