How to gracefuly shutdown a Spring Boot application by start-stop-daemon [duplicate]

Question

We have a multithreaded Spring Boot Application, which runs on Linux machine as a daemon. When I try to stop the application by start-stop-daemon like this

start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --name $NAME

The SIGTERM signal is sent and application immetiately ends. However I want the application to wait, until every thread finishes it's work.

Is there any way, how to manage what happens, when SIGTERM signal is received?

Answer 1

sample as mentioned by @Evgeny

@SpringBootApplication
@Slf4j
public class SpringBootShutdownHookApplication {

  public static void main(String[] args) {
    SpringApplication.run(SpringBootShutdownHookApplication.class, args);
  }

  @PreDestroy
  public void onExit() {
    log.info("###STOPing###");
    try {
      Thread.sleep(5 * 1000);
    } catch (InterruptedException e) {
      log.error("", e);;
    }
    log.info("###STOP FROM THE LIFECYCLE###");
  }
}

Answer 2

Spring Boot app registers a shutdown hook with the JVM to ensure that the ApplicationContext is closed gracefully on exit. Create bean (or beans) that implements DisposableBean or has method with @PreDestroy annotation. This bean will be invoked on app shutdown.

http://docs.spring.io/spring-boot/docs/current-SNAPSHOT/reference/htmlsingle/#boot-features-application-exit