Hi,
Sometimes You can get “TNS-00511: No listener ” error.
Details of error are as follows.
TNS-00511: No listener
Cause: The connect request could not be completed because no application is listening on the address specified,
or the application is unable to service the connect request in a sufficiently timely manner.
Action: Ensure that the supplied destination address matches one of the addresses used by the listener –
compare the TNSNAMES.ORA entry with 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.
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
To solve this error, stop and start listener as follows.
You can stop and start the Listener as follows.
$ srvctl stop listener $ srvctl start listener
or
$ lsnrctl stop listener $ lsnrctl start listener
If listener is not running properly, you can create a static listener and start it as follows.
Add the following listener descriptions to the listener.ora file under $ORACLE_HOME/network/admin.
Check your Hostname, Port, DB Name and fill them correctly.
LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.63.34)(PORT = 1521)) (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521)) ) ) SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (GLOBAL_DBNAME = MSDB) (ORACLE_HOME = /u01/app/db_home_18c ) (SID_NAME = MSDB1 ) ) )
[oracle@msdbadm01 ~]$ lsnrctl start LISTENER
Check listener status as follows, it is listening the Database and its service as follows.
[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 ~]$
Do you want to learn more details about RMAN, then read the following articles.
https://ittutorial.org/rman-backup-restore-and-recovery-tutorials-for-beginners-in-the-oracle-database/