TNS-03505: Failed to resolve name

Hi,

Sometimes You can get “TNS-03505: Failed to resolve name ” error.

 

Details of error are as follows.

TNS-03505: Failed to resolve name

Cause: The service name you provided could not be found in TNSNAMES.ORA, an Oracle Names server, or a native naming service.

Action: Verify that you entered the service name correctly. You may need to ensure that the name was entered correctly into the network configuration.


[oracle@msdbadm01 ~]$ tnsping MSDB

TNS Ping Utility for Linux: Version 12.1.0.2.0 - Production on 03-MAY-2020 16:46:20

Copyright (c) 1997, 2014, Oracle. All rights reserved.

Used parameter files:

/u01/app/oracle/product/12.1.0.2/dbhome_1/network/admin/sqlnet.ora

TNS-03505: Failed to resolve name

[oracle@msdbadm01 ~]$

 


To solve this error, check  the tnsnames.ora has the correct hostname and port and also is there a listener listening on the specified host and port.

 

[oracle@msdbadm01 ~]$ tnsping MSDB

TNS Ping Utility for Linux: Version 12.1.0.2.0 - Production on 03-MAY-2020 16:46:20

Copyright (c) 1997, 2014, Oracle. All rights reserved.

Used parameter files:
/u01/app/oracle/product/12.1.0.2/dbhome_1/network/admin/sqlnet.ora

TNS-03505: Failed to resolve name
[oracle@msdbadm01 ~]$

 

After fixing the  hostname and port in the tnsnames.ora, it will work fine as follows.

[oracle@msdbadm01 ~]$ tnsping MSDB

TNS Ping Utility for Linux: Version 12.1.0.2.0 - Production on 03-MAY-2020 16:46:22

Copyright (c) 1997, 2014, Oracle. All rights reserved.

Used parameter files:
/u01/app/oracle/product/12.1.0.2/dbhome_1/network/admin/sqlnet.ora


Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.63.34)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = MSDB)))
OK (0 msec)
[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/

 

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About Mehmet Salih Deveci

I am Founder of SysDBASoft IT and IT Tutorial and Certified Expert about Oracle & SQL Server database, Goldengate, Exadata Machine, Oracle Database Appliance administrator with 10+years experience. I have OCA, OCP, OCE RAC Expert Certificates I have worked 100+ Banking, Insurance, Finance, Telco and etc. clients as a Consultant, Insource or Outsource. I have done 200+ Operations in this clients such as Exadata Installation & PoC & Migration & Upgrade, Oracle & SQL Server Database Upgrade, Oracle RAC Installation, SQL Server AlwaysOn Installation, Database Migration, Disaster Recovery, Backup Restore, Performance Tuning, Periodic Healthchecks. I have done 2000+ Table replication with Goldengate or SQL Server Replication tool for DWH Databases in many clients. If you need Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS Consultancy and Training you can send my email adress mehmetsalih.deveci@outlook.com. -                                                                                                                                                                                                                                                 - Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS ve linux Danışmanlık ve Eğitim için  mehmetsalih.deveci@outlook.com a mail atabilirsiniz.

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