關于mq訊息丟失，沒有思路了。-有解無憂

問題：訊息傳遞到了rabbitmq，到了exchange，但是到不了consumer。
提前說明：本地環境與線上環境都是ok的，只有測驗環境會出現訊息丟失的情況。
詳細說明：用的是rabbitmqTemplate進行的訊息傳遞，初始化時配置了CachingConnectionFactory的
setPublisherConfirms(true)、setPublisherReturns(true)、setChannelCacheSize(100)、setChannelCheckoutTimeout(600)和
SimpleRabbitListenerContainerFactory的setPrefetchCount(100)、setConcurrentConsumers(10)、setAcknowledgeMode(AcknowledgeMode.MANUAL)。這是一些生產者的確認、回呼模式的配置，消費者確認模式的配置和channel、channel中訊息數量的配置，其余均為默認配置。
然后訊息發送到rabbitmq，生產者收到confirm確認，回傳都是ack=true，并且沒有觸發returnMessage回呼，說明訊息確實都發送到了rabbitmq的exchange，并且都找到了匹配的queue（本地測驗的時候unbind queue后，確實會觸發returnMessage回呼）。但是從consumer的日志可以看出，每次都會丟失訊息。值得一提的是每次啟動專案后，第一條訊息丟失的概率很大，當然，重發這條訊息就ok。
求指點。
代碼：
生產者
public void sendMsg(String content) {
        CorrelationData correlationId = new CorrelationData(UUID.randomUUID().toString());
        logger.info("rabbitMq send msg:{} ", content);
        rabbitTemplate.convertAndSend("exchange", "routingKey", content, correlationId);
}
@Override
    public void confirm(CorrelationData correlationData, boolean ack, String cause) {
        logger.info(" 回呼data:{}, ack:{}, cause:{}", correlationData, ack, cause);
        if (ack) {
            logger.info("訊息成功消費");
        } else {
            logger.warn("訊息消費失敗:" + cause);
            //省略重發代碼...
        }
    }
@Override
    public void returnedMessage(Message message, int replyCode, String replyText, String exchange, String routingKey) {
        logger.warn("訊息丟失,將會重新發送。:exchange({}),route({}),replyCode({}),replyText({}),message:{}",  exchange, routingKey, replyCode, replyText, message);
         //省略重發代碼...
    }

消費者：

@RabbitListener(queues = "queue", containerFactory = "simpleRabbitListenerContainerFactory")
public class RabbitMqReceiver {
    @RabbitHandler
    public void process(String content, @Headers Map<String, Object> headers, Channel channel) throws Exception {

        logger.info("rabbitMq received msg:{} ", content);
        Long deliveryTag = (Long) headers.get(AmqpHeaders.DELIVERY_TAG);
        channel.basicAck(deliveryTag,false);
        //省略業務代碼...

    }
}

uj5u.com熱心網友回復：

補一下tracing日志
{"timestamp":"2020-10-21 2:03:45:689","type":"published","node":"rabbit@BackupServer","connection":"127.0.0.1:54098 -> 127.0.0.1:5672","vhost":"/","user":"guest","channel":12,"exchange":"exchange","queue":"none","routed_queues":["queue"],"routing_keys":["routingKey"],"properties":{"priority":0,"delivery_mode":2,"headers":{"spring_returned_message_correlation":"8ea40148-7b31-4e7f-a39d-e5f94cea8ae4","spring_listener_return_correlation":"2e76a86a-7024-4fd0-8b3a-5a69825c3a96"},"content_encoding":"UTF-8","content_type":"text/plain"},"payload":"eyJ0YXNrSWQiOiIxNGJjZGM0My01Y2YzLTRkZjYtOTBlOC0wYmNjM2ZkOTgyZmQiLCJ1cmwiOiIvZGF0YS93ZWIvcHJvamVjdC9tZmsveWlucGluL3JlY29yZF95aW5waW4vMzgzNC82LndhdiJ9"}
{"timestamp":"2020-10-21 2:03:45:689","type":"received","node":"rabbit@BackupServer","connection":"127.0.0.1:54098 -> 127.0.0.1:5672","vhost":"/","user":"guest","channel":2,"exchange":"exchange","queue":"queue","routed_queues":"none","routing_keys":["routingKey"],"properties":{"priority":0,"delivery_mode":2,"headers":{"spring_returned_message_correlation":"8ea40148-7b31-4e7f-a39d-e5f94cea8ae4","spring_listener_return_correlation":"2e76a86a-7024-4fd0-8b3a-5a69825c3a96"},"content_encoding":"UTF-8","content_type":"text/plain"},"payload":"eyJ0YXNrSWQiOiIxNGJjZGM0My01Y2YzLTRkZjYtOTBlOC0wYmNjM2ZkOTgyZmQiLCJ1cmwiOiIvZGF0YS93ZWIvcHJvamVjdC9tZmsveWlucGluL3JlY29yZF95aW5waW4vMzgzNC82LndhdiJ9"}

uj5u.com熱心網友回復：

我只發送了7條訊息，tracing日志里面有全部的已發送的訊息，但是consumer日志卻只有部分已發送的訊息，而且tracing并沒有新增訊息，說明訊息并沒有被重新排隊。而且看rabbitmq控制臺，可以看到沒有unacked訊息，那么訊息應該就是被丟棄了，然后怎么處理呢。。。

uj5u.com熱心網友回復：

參考以下訊息丟失的解決方法吧
https://www.jianshu.com/p/19e0927315da

uj5u.com熱心網友回復：

你看看你的rabbitmq server上的訊息日志，每個訊息都是以日志的方式在檔案中有記錄的

uj5u.com熱心網友回復：

參考 4 樓 KeepSayingNo 的回復: