Cluster Singleton Scheduling with Spring Boot and ShedLock
Spring Boot makes it easy to schedule recurring tasks using the @Scheduled annotation. This works well for a single application instance, but what happens when the application is deployed across multiple servers or regions? Each instance runs its own scheduler, meaning the same task may execute concurrently on several instances. For some workloads, this is harmless. For others, such as importing data, publishing notifications, or performing periodic cleanup, concurrent execution can cause duplicate processing or conflicting updates. ...