Alexey Kudinkin created HUDI-3342:
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Summary: MOR Delta Block rollbacks is not working correctly if
lazy Block reading is disabled
Key: HUDI-3342
URL: https://issues.apache.org/jira/browse/HUDI-3342
Project: Apache Hudi
Issue Type: Bug
Reporter: Alexey Kudinkin
While working on HUDI-3322, i've spotted following contraption:
When we are rolling back Delta Commits, we add corresponding
{{ROLLBACK_PREVIOUS_BLOCK}} Command Block at the back of the "queue".
However, when reading that MOR table if the reader does not specify
`readBlocksLazily=true`, we'd be merging Blocks eagerly therefore essentially
rendering such Rollback Blocks useless, resurrecting the data that was
previously rolled back.
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