Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/16474#discussion_r95778417
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/FileScanRDD.scala
---
@@ -135,11 +135,21 @@ class FileScanRDD(
try {
if (ignoreCorruptFiles) {
currentIterator = new NextIterator[Object] {
- private val internalIter = readFunction(currentFile)
+ private val internalIter = {
+ try {
+ // The readFunction may read files before consuming
the iterator.
+ // E.g., vectorized Parquet reader.
+ readFunction(currentFile)
--- End diff --
is it possible that we can make `readFunction` guarantee that data reading
must happen after the first `Iterator.next`?
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