Github user viirya commented on a diff in the pull request: https://github.com/apache/spark/pull/16474#discussion_r96162528 --- 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 -- I think it is hard to guarantee this because `readFunction` is coming from individual data source. Even we can modify current data sources, we may not be able to prevent other data sources doing this.
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