Fatal NI connect error 12547 after downgrade DB
(Doc ID 1207226.1)
Last updated on JUNE 16, 2022
Applies to:Oracle Net Services - Version 10.2.0.2 to 10.2.0.4 [Release 10.2]
Information in this document applies to any platform.
SymptomsTNS-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
ChangesIf the Oracle database is upgraded, deemed to be working, but then downgraded back to the original version, connections may result in a TNS-12518.
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