RobertIndie commented on issue #403:
URL: 
https://github.com/apache/pulsar-client-go/issues/403#issuecomment-2139238541

   > What if consumer crashed after consuming message but before ack/nack the 
message? Does broker redeliver in that case?
   
   Yes. The broker will redeliver those messages when the consumer subscribes 
next time.
   
   If the consumer does not ack/nack the messages, the subscription's position 
will not move forward. When the consumer fetches messages again, it will 
continue from where the subscription last stopped.


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