php - How can RabbitMQ not respond to ack messages back to the queue?

Question

The php language used, the expansion package is php-amqplib.
Question 1: How to resend unanswered ack messages to other consumers?
Question 2: All consumer queues are dead. How to prevent messages sent to exchange from being lost? Restarting the consumer process can obtain previously sent messages.
Thanks

Answer 1

1 basic.nack

2 rabbitmq supports message persistence

Answer 2

You can get started easily. The problems you mentioned are recorded in the article:
RabbitMQ Chinese Documentation

Answer 3

You can try the swoole extension