syhily opened a new pull request, #19977:
URL: https://github.com/apache/flink/pull/19977

   ## What is the purpose of the change
   
   Pulsar unordered reader is used for Shared and Key_Shared subscriptions. It 
would reconsume a message if it didn't acknowledge in a transaction. But this 
didn't works now. Because we don't use Pulsar's Multiple consumer. The best way 
to solve this problem is just delete this reconsumeLater logic.
   
   ## Brief change log
   
   Delete the reconsumeLater when meeting exceptions in acknowledge.
   
   ## Verifying this change
   
   This change is a trivial rework without any test coverage.
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): (no)
     - The public API, i.e., is any changed class annotated with 
`@Public(Evolving)`: (no)
     - The serializers: (no)
     - The runtime per-record code paths (performance sensitive): (no)
     - Anything that affects deployment or recovery: JobManager (and its 
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (no)
     - The S3 file system connector: (no)
   
   ## Documentation
   
     - Does this pull request introduce a new feature? (no)
     - If yes, how is the feature documented? (not applicable)
   


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