Additional Notes
Why does `synchronized` not fully fix distributed oversell?
Track: Java
Topic: Java Threading
Focus: Synchronized and Locks
Java: Synchronized and Locks
Answer
Because it coordinates only threads inside one JVM process.
A local lock can stop two threads in the same instance from racing, but it cannot stop another application instance behind the load balancer from reserving the same stock. Distributed correctness needs a shared boundary rule.
A local lock can stop two threads in the same instance from racing, but it cannot stop another application instance behind the load balancer from reserving the same stock. Distributed correctness needs a shared boundary rule.
Topics: Java Java Threading Synchronized and Locks