April 9, 2020

UNABLE_TO_LOCK_ROW : unable to obtain exclusive access to this record or 1 records

For consistent data, when a record is being created or updated, it is locked so that other users cannot update the record.

FOR UPDATE keyword in SOQL helps us to lock the records from being updating from another request. Sample Code - http://www.infallibletechie.com/2015/05/how-to-lock-records-using-apex-in.html

Locking Issue may happen due to Skewing issue - http://www.infallibletechie.com/2019/11/salesforce-data-skew.html

Salesforce Reference Link - https://help.salesforce.com/articleView?id=000338933&type=1&mode=1

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