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ORA-4021 Raised During COMMIT And Message "qsmqChkOCMV : Timeout while locking object" Appears In Alert.log (Doc ID 2615963.1)

Last updated on DECEMBER 10, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 12.2.0.1 and later
Oracle Database - Standard Edition - Version 12.2.0.1 and later
Information in this document applies to any platform.

Symptoms

ORA-4021 "timeout occurred while waiting to lock object" error was raised during COMMIT of a transaction which modified a table which is a master of a materialized view.

At that time, message "qsmqChkOCMV : Timeout while locking object:XXXXX" was printed in the alert.log.

 

Changes

Issue may occur on release 12.2.0.1 and onwards. User may experience this issue after upgrading to 12.2.0.1.

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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