Dongnuo Lyu created KAFKA-17306:
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             Summary: Soften the validation when replaying tombstones
                 Key: KAFKA-17306
                 URL: https://issues.apache.org/jira/browse/KAFKA-17306
             Project: Kafka
          Issue Type: Sub-task
            Reporter: Dongnuo Lyu


At present, replaying the tombstones requires the deleted entity to exist. 
However the record to create the entity can be removed and only leave the 
tombstone after compaction.

This can cause error when a group coordinator loads a new __consumer_offsets 
partition, as some entities can be removed without creation during replay. As a 
result, we should soften the validation when replaying tombstones to avoid it.



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