ORA-4021 is Thrown by Wnnn process
Last updated on JUNE 20, 2017
Applies to:Oracle Database - Enterprise Edition - Version 188.8.131.52 and later
Information in this document applies to any platform.
***Checked for relevance on 22-Sep-2016***
Getting ORA-4021 error messages in alert.log file.
Event 4021 is set
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