This article explains how to update a Spring Boot application without stopping the old process by letting a new instance start on the same port, detailing the Tomcat internals, the required ServletContainerInitializer callbacks, and providing a complete, step‑by‑step implementation with code samples and a live test.
This article explains how to update a SpringBoot application without stopping the service by letting the old and new processes share the same port, detailing the underlying Tomcat and ServletContainerInitializer mechanisms, providing a step‑by‑step implementation and a demo for seamless zero‑downtime deployments.
The article explains how to update a SpringBoot application without stopping the old process by detecting port usage, temporarily launching a new instance on an alternate port, then seamlessly switching the original port to the new instance, achieving near‑zero downtime.
This article explains how to achieve seamless code updates for SpringBoot applications by allowing two processes to share the same port, detailing the underlying servlet container mechanics, the role of DispatcherServlet, and providing a complete Java implementation with step‑by‑step instructions and code samples.
