[GitHub] [pulsar] merlimat opened a new pull request #11672: If a topic has compaction policies configured, we must ensure the subscription is always pre-created

[GitBox <gi...@apache.org>]

merlimat opened a new pull request #11672:
URL: https://github.com/apache/pulsar/pull/11672


   ### Motivation
   
   When using a compacted topic, the compaction cursor ensure that everything that is published after the last compaction run is retained in the topic. The problem is that the cursor is only created when the compaction runs for the first time. 
   
   If a topic as a threshold-based compaction schedule, this might get triggered for the first time well after the retention time of the data, causing data loss at the beginning of the topic. Instead, we should ensure that when the topic is created the subscription is created as well, before the topic can accept publishes.
   
   Similarly, if the policy is added later on, we should start retain data from that moment.
   
   


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[GitHub] [pulsar] merlimat merged pull request #11672: If a topic has compaction policies configured, we must ensure the subscription is always pre-created

[GitBox <gi...@apache.org>]

merlimat merged pull request #11672:
URL: https://github.com/apache/pulsar/pull/11672


   


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