If an OptimisticLockException occurs, what should be done? Will Spring Data automatically retry the transaction?

OptimisticLockException occurs when using optimistic locking in JPA/Hibernate, when a version conflict is detected during entity saving (for example, someone else has modified the data between reading and writing).

Spring Data does not automatically retry the transaction when an OptimisticLockException is thrown. This exception needs to be handled manually.

What to do with OptimisticLockException:

• Usually, catch the exception and retry the operation (for example, reload the entity, apply changes, and try to save again).
• You can implement retry logic with a limit on the number of attempts.
• In some cases, it makes sense to notify the user about the conflict and suggest updating the data.

Example of handling:

try {
    repository.save(entity);
} catch (OptimisticLockException e) {
    // retry logic or notification
}

To automate retries, you can use Spring Retry, but by default, Spring Data does not do this.