在我的 java 代码中，我创建了一个订阅者

public Subscriber createSubscriber(String subscriptionId, MessageReceiver receiver) throws MessagingException {
        Subscriber subscriber = null;
        ProjectSubscriptionName subscriptionName = null;
        String projectId = getProjectId();
        if (Objects.isNull(projectId) || Objects.isNull(subscriptionId)) {
            throw new MessagingException(MessagingErrorCodes.MIX90810
                    + " Project Id/Subscription Id is null for subscriptionId = " + subscriptionId + " projectId= "
                    + projectId, MessagingErrorCodes.MIX90810);
        }
        try {
            subscriptionName = ProjectSubscriptionName.of(projectId, subscriptionId);
            subscriber = Subscriber.newBuilder(subscriptionName, receiver).setExecutorProvider(getExecutorProvider()).build();
        } catch (Exception e) {
            throw new MessagingException(MessagingErrorCodes.MAX34540
                            + " Error occurred while creating the subscriber for the subscriptionId = " + subscriptionId
                            + "projectId " + projectId + "subscriptionName= " + subscriptionName,
                    MessagingErrorCodes.MAX34540, e);
        }
    enter code here
        return subscriber;
    }

我第一次在我的接收消息（PubsubMessage消息，AckReply消费者消费者）上收到消息，但如果我不确认消息，就不会再次收到消息。但如果发送nack，它会再次发送消息。

@Service
public class MyMessageReceiver implements MessageReceiver {

    @Override
    public void receiveMessage(PubsubMessage message, AckReplyConsumer consumer) {
        System.out.println(message.getMessageId());
    }
}

我是否需要提及其他配置以在不确认消息的情况下启用重试？