After Killing Service That Participates in RAC, UCP Connections Fail With ORA-12521
(Doc ID 2393137.1)
Last updated on NOVEMBER 01, 2021
Applies to:Universal Connection Pool - Version 18.104.22.168.0 to 18.4 [Release 12.1 to 18c]
Information in this document applies to any platform.
When testing Application Continuity with JDBC/UCP 22.214.171.124, multiple connection attempts fail with the error ORA-12521: TNS:listener does not currently know of instance requested in connect descriptor.
The test in question executes a reboot -f during the commit phase. This reboot -f reboots the machine without shutting it down, during the activity.
The error message:
java.sql.SQLRecoverableException: IO Error: A connection attempt failed
because the connected party did not properly respond after a period of time,
or established connection failed because connected host has failed to
respond, Authentication lapse 0 ms.
ORA-12521, TNS:listener does not currently know of instance requested in
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