Database frequently stop connecting after upgrade 19c
We’re facing the issue database frequently stop connecting after upgrade to 19c (19.3). this database which is running on windows server 2016.
Errors in listener.log file
TNS-12518: TNS:listener could not hand off client connection
TNS-12546: TNS:permission denied
TNS-12560: TNS:protocol adapter error
TNS-00516: Permission denied
64-bit Windows Error: 5: Input/output error
Core dump should created on somewhere in your database server locations.
Apply database 19.7 or latest patches. the issue will be fixed
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