stankiewicz commented on issue #36991:
URL: https://github.com/apache/beam/issues/36991#issuecomment-3612775061

   I've looked at when we acknowledge messages.
   
   theory: 
   1. split was rebalanced
   2. checkpoint was rejected, finalization wasn't invoked, msg.ack wasn't 
invoked
   3. split reader started on different worker 
   Solace hasn't resend messages that weren't accepted -> data loss.
   
   There were some issues with messages that were stuck and never retried by 
Solace - @bzablocki  do you remember?


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