Fatal NI connect error 12547 after downgrade DB
(Doc ID 1207226.1)
Last updated on SEPTEMBER 30, 2011
Oracle Net Services - Version: 10.2.0.2 and later [Release: 10.2 and later ]
Information in this document applies to any platform.
TNS-12518: TNS:listener could not hand off client connection
TNS-12547: TNS:lost contact
TNS-12560: TNS:protocol adapter error
TNS-00517: Lost contact
Solaris Error: 32: Broken pipe
If the Oracle database is upgraded, deemed to be working, but then downgraded back to the original version, connections may result in a TNS-12518.
Sign In with your My Oracle Support account
Don't have a My Oracle Support account? Click to get started
My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms