maropu commented on a change in pull request #25913: [WIP][SPARK-29221][SQL]
LocalTableScanExec: handle the case where executors are accessing "null" rows
URL: https://github.com/apache/spark/pull/25913#discussion_r327867726
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/LocalTableScanExec.scala
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@@ -37,7 +37,7 @@ case class LocalTableScanExec(
"numOutputRows" -> SQLMetrics.createMetric(sparkContext, "number of output
rows"))
@transient private lazy val unsafeRows: Array[InternalRow] = {
- if (rows.isEmpty) {
+ if (rows == null || rows.isEmpty) {
Review comment:
Ah, I see. I'm a bit worried that this value could be different between a
driver and executors. Which code touches this variable in executors? What's the
stacktrace for `unsafeRows`?
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