Alexey Kudinkin created HUDI-3828:
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             Summary: We need to revisit MOR block merging sequence
                 Key: HUDI-3828
                 URL: https://issues.apache.org/jira/browse/HUDI-3828
             Project: Apache Hudi
          Issue Type: Bug
            Reporter: Alexey Kudinkin
            Assignee: Alexey Kudinkin
             Fix For: 0.12.0


We need to revisit MOR block merging sequence and make sure that following 
invariants are upheld
 # Block have to be merged backward-pass (ie we first fetch all the blocks, and 
merge them in the reverse order of their timeline)
 # We should try to avoid having 2 merging sequences and instead consolidate on 
just one: right now we have "block + block", and "base + block", but we should 
be able to just get away with just the latter (this will simplify merging 
sequence quite substantially, for ex in respect to handling of deletions) 



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