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ORA-25408 in RAC but no failover/ no switchover occured

in SQL*Plus (MOSC) 4 commentsAnswered ✓

Oracle EE 19.18 RAC,TAF,DataGuard,Observer

The application and SQL Plus dialog get ORA-25408. But there was no switchover or failover. Nothing out of the ordinary. No entries about this situation in Alert.log. 

Also after SELECT .... and also when quitting the SQL Plus dialog after about an hour of idle time, sometimes ORA-25408 is displayed.

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