Github user BryanCutler commented on a diff in the pull request:
https://github.com/apache/spark/pull/19884#discussion_r157957465
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/python/ArrowPythonRunner.scala
---
@@ -126,18 +121,14 @@ class ArrowPythonRunner(
private var schema: StructType = _
private var vectors: Array[ColumnVector] = _
- private var closed = false
-
context.addTaskCompletionListener { _ =>
// todo: we need something like `reader.end()`, which release all
the resources, but leave
--- End diff --
ok done
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