@Override
    public void start() {
        if (this.isRunning()) {
            throw new IllegalStateException("container already running. " + name);
        }
        if (Objects.nonNull(pushConsumer)) {
            throw new IllegalStateException("consumer has been build. " + name);
        }
        try {
            this.pushConsumer = pushConsumerBuilder.build();
        } catch (Exception e) {
            throw new IllegalStateException("Failed to start RocketMQ push consumer", e);
        }
        this.setRunning(true);

        log.info("running container: {}", this.toString());
    }
The name of the DefaultRocketMQListenerContainer instance
rocketmq-v5-client-spring-boot/src/main/java/org/apache/rocketmq/client/support/DefaultListenerContainer.java