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Posted to commits@pulsar.apache.org by GitBox <gi...@apache.org> on 2021/02/16 02:36:30 UTC

[GitHub] [pulsar] codelipenghui commented on pull request #9583: Disable negativeAck for Key_Shared sub type.

codelipenghui commented on pull request #9583:
URL: https://github.com/apache/pulsar/pull/9583#issuecomment-779543465


   @merlimat 
   
   I'm not sure how `the negative acks also work for Exclusive and Failover subscriptions, which are also ordered` works, from the source code, seems nothing different for the negative ack between different subscription types. For sequential processing, the application usually processes the next message after one message is successfully processed. So the application should retry the failed message until processed successfully.
   
   Currently, users can use the strictly ordered guarantee and allow out of order. I think If users enabled the out of order option, they can use the DLQ/nack, but for the strictly ordered guarantee, we should avoid the DLQ and nack.


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