ORA-609 : opiodr aborting process unknown ospid

Cause:

The ORA-609 error is thrown when a client connection of any kind failed to complete or aborted the connection

process before the server process was completely spawned.

Beginning with 10gR2, a default value for inbound connect timeout has been set at 60 seconds.

This is also triggered, when a DB session is killed/aborted manually from the OS prompt.

Solution:

Increase the values for INBOUND_CONNECT_TIMEOUT at both listener and server side sqlnet.ora file as a preventive measure.

If the problem  is due to connection timeouts,an increase in the following parameters should eliminate or reduce the occurrence of the ORA-609s.

Sqlnet.ora: SQLNET.INBOUND_CONNECT_TIMEOUT=180

Listener.ora: INBOUND_CONNECT_TIMEOUT_listener_name=120

For more details -- refer to metalink note [ID 1121357.1]

All the contents are not defined/ derived by myself.

I have consolidated/added accordingly for ease of access.