[SPARK-22230] Swap per-row order in state store restore. #19461
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LGTM |
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Test build #82566 has finished for PR 19461 at commit
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Thanks! Merging to master and |
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Oh, there are some conflicts with 2.2. @joseph-torres could you submit a backport PR, please? |
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Discussed offline. We don't need to backport to branch-2.2. |
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What changes were proposed in this pull request?
In state store restore, for each row, put the saved state before the row in the iterator instead of after.
This fixes an issue where agg(last('attr)) will forever return the last value of 'attr from the first microbatch.
How was this patch tested?
new unit test