pgandhi999 commented on issue #24149: [SPARK-27207] : Ensure aggregate buffers are initialized again for So… URL: https://github.com/apache/spark/pull/24149#issuecomment-476411314 Turns out that is not true in the case of `SortBasedAggregator`. In the code that I have pasted above, `processRow()` is called on `result.aggregationBuffer` which performs `update` and later, `mergeAggregationBuffers` is called on the same `result.aggregationBuffer` which performs `merge`. This is what I could infer from the code as well as debug logs that I added, correct me if I am wrong.
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