Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/20277#discussion_r162844101
--- Diff:
sql/core/src/main/java/org/apache/spark/sql/vectorized/ArrowColumnVector.java
---
@@ -55,164 +43,82 @@ public void close() {
if (childColumns != null) {
for (int i = 0; i < childColumns.length; i++) {
childColumns[i].close();
+ childColumns[i] = null;
--- End diff --
what do you mean? `ColumnVector.close` is a required interface.
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