ORA-609 : opiodr aborting process unknown ospid (8327_47148946930848)
As a general error, the ORA-609 error indicates that a client connection failed to complete. This can be an ORA-609 from an abort or killing an Oracle session.
To diagnose any error, you start by using the OERR UTILITY to display the ORA-609 error:
bash-3.2$ oerr ora 609 00609, 00000, "could not attach to incoming connection" // *Cause: Oracle process could not answer incoming connection // *Action: If the situation described in the next error on the stack // can be corrected, do so; otherwise contact Oracle Support.
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.
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
Reference metalink Doc ID 1121357.1