ORA-609 : Opiodr aborting process unknown ospid

I got ” ORA-609 : Opiodr aborting process unknown ospid ” error in Oracle.


ORA-609 : Opiodr aborting process unknown ospid


Details of error are as follows.

ORA-00609: could not attach to incoming connection
ORA-12537: TNS:connection closed
ORA-609 : opiodr aborting process unknown ospid (2436_7464)
ORA-609 : opiodr aborting process unknown ospid (21631120_1)



Opiodr aborting process unknown ospid

This ORA-609 errors are related with the client disconnecting before the connection can be established fully. Timeout parameters INBOUND_CONNECT_TIMEOUT_<listener_name> in the  LISTENER.ORA file and SQLNET.INBOUND_CONNECT_TIMEOUT in the SQLNET.ORA need to be reviewed.

If using the default of 60 seconds, (no explicit setting), then it is likely these parameters will need to be increased.

  • Review and check network settings for the server machine where the database is running. Ensure settings are all correct and as expected and DNS servers are available
  • If the server platform is Microsoft Windows, check the Windows Services for TNS listener and database ensure each service is started using the same account.


To solve this error, set SQLNET.INBOUND_CONNECT_TIMEOUT=180 in Sqlnet.ora.

and set INBOUND_CONNECT_TIMEOUT_listener_name=120 in Listener.ora under $ORACLE_HOME/network/admin.


Do you want to learn Oracle Database for Beginners, then read the following articles.

Oracle Tutorial | Oracle Database Tutorials for Beginners ( Junior Oracle DBA )


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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