The article explains how to achieve a graceful termination of a Linux process by sending SIGTERM (kill -15), how the signal translates into a thread interrupt that causes sleep to throw an exception, and why the end‑flag still prints in a simple Spring Boot‑style example.
The article explains the dangers of using kill -9 to terminate Java processes, illustrates how it can cause data loss in database operations, and provides several practical approaches—including SIGTERM, ConfigurableApplicationContext.close(), Spring Boot Actuator, and a custom Tomcat shutdown hook—to gracefully stop Spring Boot services while preserving data integrity.
This article explains the risks of using the Linux kill -9 command to terminate Spring Boot applications, demonstrates how it can cause data inconsistency and thread interruptions, and provides several graceful shutdown techniques—including SIGTERM, Spring's ConfigurableApplicationContext, Actuator endpoints, and custom Tomcat shutdown hooks—to safely stop services and optionally perform data backup.
