code: public static void shutDownActorSystemForce() {
          if (!actorSystem.isTerminated()) {
              logger.info("shutting down actor system...");
              actorSystem.shutdown();
              actorSystem.awaitTermination(timeOutDuration);
              logger.info("Actor system has been shut down.");
          } else {
              logger.info("Actor system has been terminated already. NO OP.");
          }
  
      }
docs: Shut down actor system force.