Hibernate - Batch update returned unexpected row count from update: 0 actual row count: 0 expected: 1

java

hibernate-configuration

logging-best-practices

transaction-management

byNikita Barsukov·Feb 9, 2025

To transform Hibernate's "Batch update returned unexpected row count from update: 0" error into a ghost of the past:

Scrutinize the target entity's presence in the DB.
Sync the session like a pro DJ. Reflect the real-time database state with session.flush() and session.clear().
Ensure transaction management could pass a Turing test. Sidestep unwanted rollbacks.
Check your ID generation like a pro-grammar 'nazi'. Ensure it aligns with DB norms.
Navigate the @Version annotation like a tour guide in an optimistic locking paradise.

A busy-bee example in action:

Transaction tx = null; // Just like my bank account at month-end
try {
    tx = session.beginTransaction(); 
    MyEntity entity = session.get(MyEntity.class, id); // Where are you, little entity?
    if (entity == null) throw new ObjectNotFoundException("Oops! Entity at ID: " + id + " lost in the Bermuda triangle");
    
    entity.setField(newValue); // Planting new values, hoping they grow
    session.flush(); //.Flushing out the old
    session.clear(); // Making way for the new
    tx.commit(); // Commitment issues resolved
} catch (HibernateException e) {
    if (tx != null) tx.rollback(); // Oops... Ctrl + Z!
    throw e; // Let it go, as Elsa says
}

Dealing with ghosts in the machine

Is this pesky error haunting you? Let's gear up for a ghost-hunting adventure! Here are your best tools:

Set up Ghostbusters HQ: Enable logs

Java version of the Ghostbusters' PKE Meter

<property name="hibernate.show_sql" value="true"/> // Show us the SQL truth!
logging.level.org.hibernate=DEBUG // Hibernate, speak your mind!
logging.level.org.springframework.orm=DEBUG // Spring ORM, your opinion matters!

Erect holy barriers: Apply constraints

Holy water for your DB and entity mappings

Use the armour of DB constraints to protect your database integrity.
Employ Hibernate Validator like a salt ring, for blessings of validation and integrity checks.

Call Ghostbusters: Evoke the error

Ghostly playing of the iconic Ghostbusters tune

@Test(expected = ObjectNotFoundException.class)
public void whenUpdateFeelsLikeTalkingToAGhost() {
    // simulate a haunted transaction scenario
}

Examine your ghost-catching tools: Inspect mappings

Coming soon - Ghostbusters: Mapping Inspection

Validate your entity mappings, as a misaligned Proton Pack would be risky.
Check for auto_increment property in your DB schema like Egon checks traps.

Plan your attack: Defensive coding

Like planning who goes where during the final scene of a big boss fight

Validate entities as if you were inspecting ghost traps.
Use Lock Modes to prevent Casper from being not so friendly.

Understand the haunting ground: Learn transaction management

Embracing Venkman's sarcastic wit with Hibernate

Keep transactions short and sweet, like Stay-Puft Marshmallow Man’s screen time.
Clear transaction boundaries to prevent an ectoplasmic disaster.

Visualization

The unexpected row count error in Hibernate visualized as training with a Twitch Prime subscription:

Hibernate Upgrade: 🛠️ Apply Twitch Prime (Expected subscription: 1 🎮)
| Database Status    | Result    |
|--------------------|-----------|
| Subscription Exists | ✅         |
| No Subscription Found | ❌         |

Hibernate prepared to upgrade to Twitch Prime (🎮) with an existing subscription.

Expected: 🛠️ ➡️ 🎮 (1 upgrade, 1 subscription)
Actual:   🛠️ ➡️ ❌ (0 upgrades, 0 subscriptions)

Hibernate's confusion: Hold on, where's the subscription? I was promised an upgrade but I got nothing!

Advanced ghost-busting strategies

Comprehensive logging and error handling

Ghost trail diary:

if (affectedRows == 0) {
    log.error("Ghost sighted at method XYZ: Entity not found with ID " + id);
    throw new GhostUpdateException("Entity not found with ID " + id + ". Call Ghostbusters!");
}

Understanding transactional mystery

Solving the riddles of the phantasm world

Decipher the eerie dance of Hibernate's session and transaction boundaries.
Prepare your weaponry using @Version for optimistic locking in the face of ghostly concurrency.

explain-codes / Java / Hibernate - Batch update returned unexpected row count from update: 0 actual row count: 0 expected: 1

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