Github user koertkuipers commented on the issue:
https://github.com/apache/spark/pull/13512
@cloud-fan i am running into some trouble updating my branch to the latest
master. i get errors in tests due to Analyzer.validateTopLevelTupleFields
the issue seems to be that in KeyValueGroupedDataset[K, T] the Aggregators
are supposed to operate on T, but the logicalPlan at this point already has K
appended to T because AppendColumns(func, inputPlan) is applied to the plan
before its passed into KeyValueGroupedDataset. so validateTopLevelTupleFields
also sees the column for the key in the inputs and believes the deserializer
for T is missing a field.
any suggestions on how to get around this?
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