HPUX: Intermittent ORA-12505 Errors Connecting Via Listener to Instance
(Doc ID 956199.1)
Last updated on OCTOBER 12, 2016
Oracle Net Services - Version: 18.104.22.168.0 and later [Release: 9.2 and later ]
HP Tru64 UNIX
The problem documented here is limited to HPUX and 22.214.171.124 Oracle Database.
Connections that used to work begin to fail intermittently with ORA-12505 errors.
ORA-12505: TNS:listener does not currently know of SID given in connect descriptor
In this case, the error occurred as infrequently as 5-10 in a 24 hour period.
It is likely that an HP-UX OS patch was applied recently and the onset of this problem appears to have occurred at about the same time.
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