TNS-01106: Listener using listener name string has already been started


Sometimes You can get “TNS-01106: Listener using listener name string has already been started ” error.


Details of error are as follows.

TNS-01106: Listener using listener name string has already been started
Cause: Another listener is already listening on one of the ADDRESSes specified.
Action: Shutdown the previous listener specified by the listener name before starting this one.

This error is related with Two or more listeners have same port, and listeners cannot have same port on same server.

Check your listeners and change the listeners port and they should be different. If one listener port is 1521, then another one should be 1522 or 1523.



Do you want to learn more details about RMAN, then read the following articles.


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 [email protected].-                                                                                                                                                                                                                                                 -Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS ve linux Danışmanlık ve Eğitim için  [email protected] a mail atabilirsiniz.

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