Spring Boot Hibernate Lock

In this tutorial, you'll learn about Fix Spring Boot Hibernate Lock Not Acquiring. We cover key concepts, practical examples, and best practices.

The Problem

Hibernate lock acquisition fails with LockAcquisitionException or timeouts.

Quick Fix

Use correct lock mode

Wrong:

LockModeType lockMode = null; // No lock
entityManager.find(Product.class, id);

Output:

No lock acquired

Right:

entityManager.find(Product.class, id, LockModeType.PESSIMISTIC_WRITE);

Output:

Write lock acquired

Configure lock timeout

Wrong:

// Default timeout
@QueryHints(@QueryHint(name = "jakarta.persistence.lock.timeout", value = "5000"))

Output:

Default 0 timeout

Right:

@QueryHint(name = "jakarta.persistence.lock.timeout", value = "10000")
// 10 seconds

Output:

Custom lock timeout

Handle lock exceptions

Wrong:

// No try-catch
entityManager.lock(entity, PESSIMISTIC_WRITE);

Output:

Lock fails silently

Right:

try {
    entityManager.lock(entity, PESSIMISTIC_WRITE);
} catch (LockAcquisitionException e) {
    // retry logic
}

Output:

Exception handled

Prevention

• Specify LockModeType in find or lock operations
• Configure lock.timeout query hint
• Catch LockAcquisitionException for retry

Common Mistakes with boot hibernate lock

1. Using return to exit a function early instead of wrapping a pure value in the monad
2. Mixing let bindings with <- bindings in do notation, producing type errors
3. Overlapping type class instances that cause GHC to reject the program with ambiguous dispatch errors

These mistakes appear frequently in real-world SPRING code. DodaTech's contributors have identified these patterns through analysis of open-source projects and production systems.

Practice Exercise

Write a pure function that safely divides two integers using Maybe, then test it with edge cases like division by zero and negative numbers.

This exercise reinforces the concepts covered in this guide. Try implementing it before checking online solutions.

FAQ

This quick fix is part of the DodaTech Spring & JVM ecosystem series. Built by the developers of Doda Browser, DodaZIP, and Durga Antivirus Pro.