merlimat commented on issue #2400: PIP-22: Dead Letter Topic
   > @merlimat @rdhabalia can you confirm the summary is correct?
   > frankly speaking, I am not sure about the producer concerns: producer 
memory, authorization, and schema. if you model DLQ topic as replicating 
messages whose delivery count is larger than max-delivery-count, it should be 
no difference than cross-data-center replication.
   I'm not saying it's not possible to make it efficient and safe, but that it 
would require more work to cover all conditions
   > @sijie Yes, it's approach work for me. We should send a request to broker 
for get redelivery count per message when consumer send redeliverUnackMessages 
request before?
   The dispatcher could include the redelivery count when pushing messages to 
the consumer (in `CommandMessage`).

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