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ORA-4021 is Thrown by Wnnn process (Doc ID 1965194.1)

Last updated on FEBRUARY 20, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.4 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
***Checked for relevance on 22-Sep-2016***

Symptoms

Getting ORA-4021 error messages in alert.log file.

Changes

 Event 4021 is set

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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