We can be sure that no other transaction will modify them. If the initial select query is successful, rows which meet the select query criteria are locked for the duration of a transaction. Pessimistic locking in hibernate PessimisticLockException will be thrown when we query for rows which are already locked. when multiple users simultaneously update the records resulting in inconsistencies). In hibernate, Locking represents a mechanism to safeguard the records that can be simultaneously accessed to avoid the concurrency errors (i.e. You, therefore, need to make sure that your client always updates its representation of the entity after the user triggered any change on the entity. If you use optimistic locking, Hibernate uses a version column to keep track of the current version of the entity and to prevent concurrent modifications. How do you stop optimistic locking in Hibernate? For the old object set the latest version from Database.
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