tjiuming opened a new pull request, #18886:
URL: https://github.com/apache/pulsar/pull/18886

   ### Motivation
   
   Currently, we don't handle PendingAckHandleImpl relay failed.
   If the operation failed, it won't relay again, and won't remove the 
subscription from PersistentTopic which is already created.
   It will lead to an unexpected situation: we couldn't create Consumers on the 
subscription.
   Because in PersistentTopic#subscriptions, the subscription already exists, 
but initialized failed.
   
   ### Documentation
   
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   - [ ] `doc-required` <!-- Your PR changes impact docs and you will update 
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   - [x] `doc-not-needed` <!-- Your PR changes do not impact docs -->
   - [ ] `doc-complete` <!-- Docs have been already added -->
   
   ### Matching PR in forked repository
   
   PR in forked repository: <!-- ENTER URL HERE -->
   


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