Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/15089#discussion_r81419085
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/python/BatchEvalPythonExec.scala
---
@@ -98,7 +353,7 @@ case class BatchEvalPythonExec(udfs: Seq[PythonUDF],
output: Seq[Attribute], chi
// For each row, add it to the queue.
val inputIterator = iter.grouped(100).map { inputRows =>
val toBePickled = inputRows.map { inputRow =>
- queue.add(inputRow)
+ queue.add(inputRow.asInstanceOf[UnsafeRow])
--- End diff --
Comparing to assert, the error message actually looks similar: the row
should be UnsafeRow but actually it's not. I think this is an fundamental
assumption, there are many places (20 for now) that has this.
```
davies@localhost:~/work/spark$ git grep '.asInstanceOf\[UnsafeRow\]' | wc -l
20
```
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