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ORA-12518: TNS: listener could not hand off client connection tips

Oracle Error Tips by Burleson Consulting

Note:  Starting in 11gR2, the listener log is not activated by default.  You have to turn on listener logging:   logging_listener_name=on

Oracle docs note this about ORA-12518:

ORA-12518: TNS:listener could not hand off client connection
 
Cause: The process of handing off a client connection to another process failed.

Action: Turn on listener tracing and re-execute the operation. Verify that the listener and database instance are properly configured for direct handoff. If problem persists, call Oracle Support.

ORA-12518 has been known to occur in Oracle Net Services version 9.2.0.5-10.2.0.1 in which attempting new connections on the database throw either ORA-12518 or TNS-12518.  ORA-12518 appears in the listener log upon new user connection. 


 

 

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Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals.  Feel free to ask questions on our Oracle forum.

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Errata?  Oracle technology is changing and we strive to update our BC Oracle support information.  If you find an error or have a suggestion for improving our content, we would appreciate your feedback.  Just  e-mail:  and include the URL for the page.


                    









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