Resolved ORA-12541: TNS no listener error

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#Resolved ORA-12541: TNS no listener error



N no. of articles you will find on the internet about “ORA-12541 TNS no listener error” but still finding an effective solution. Don’t worry this solution helped me a lot and I hope it will help you too.
I got the same issue while working on Oracle 12c database then I decided to share my experience and steps to resolve this issue.
solution :
guys just check your ip please
1)firstly check that ip and hostname are ping correctly.
2)reload lsnrctl file also by lsnrctl reload and lsnrctl status.
3)now make sure instance is connected and running by command
select name,open_mode from v$database;
4)now check tnsnames by tnsping (dbname) if it show OK then it works.
if still issue continue please make new files by NETCA
dont use "SQLNET.AUTHENTICATION_SERVICES = (NONE)"
this is for authentication purpose only as it ask for password when connect with sql.

thanks
Anand gupta

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