[GitHub] [pulsar] codelipenghui edited a comment on issue #6721: Redelivery count is not getting updated for negatively acknowledged messages.

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codelipenghui edited a comment on issue #6721: Redelivery count is not getting updated for negatively acknowledged messages.
URL: https://github.com/apache/pulsar/issues/6721#issuecomment-612795603
 
 
   > I'm testing it on a Exclusive subscription. Yeah, its working on shared, is there anyway I can use redelivery_count in exclusive subscription.
   
   Currently, `redelivery_count` only enabled on shared or Key_Shared subscription. The original intention is for dead letter topic implementation. The dead letter queue or dead letter topic is a concept of the messaging system such as RabbitMQ, and Shared subscription is suitable for message queue scenarios, Exclusive and Failover subscription is suitable for streaming scenarios. Therefore, I did not consider adding support for the dead letter topic in Exclusive and Failover subscriptions when I add DLQ support for Shared subscription. 
   
   Can you briefly describe your scenario? So that we can consider whether it is necessary to support  `redelivery_count` on Exclusive and Failover subscriptions.
   

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