Solving Inventory Over-Selling with Locking Mechanisms and Distributed Locks
Understanding the Root Cause: Inventory Over-Selling
A classic inventory over-selling issue arises when multiple conucrrent requests decrement stock without proper synchronization. Consider a scenario where product inventory is stored in MySQL, and the stock reduction logic is implemented as follows:
@Service
public class StockService {
@A ...
Posted on Sun, 27 Sep 2026 16:51:05 +0000 by Diceman
Implementing Distributed Locks with Redis
Single-System Locks
In single-system architectures, locks like ReentrantLock are effective for controlling concurrent access within a single JVM. However, when multiple instances of an application are running behind a load balancer, these locks become ineffective as each instance operates independently.
Testing with JMeter to simulate high co ...
Posted on Tue, 07 Jul 2026 16:32:24 +0000 by Stingus