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Why so many ORA-00609 ORA-12638 TNS-12638 in the alert.log

in Database Administration (MOSC) 5 commentsAnswered ✓

I'm running an Oracle Database Enterprise Edition 19.13 on Windows 64b 2019. The alert.log is showing constantly the following error messages:

ORA-00609: could not attach to incoming connection

ORA-12638: Credential retrieval failed

TNS-12638: Credential retrieval failed

Database service is up. ADRCI shows no problems. No complaints for users. But traces destination occupancy is growing rapidly.

Are this messages ignorable? How can I make them stop?

Thank you,

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