Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/16474#discussion_r94892571
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFileFormat.scala
---
@@ -543,6 +546,58 @@ object ParquetFileFormat extends Logging {
}
/**
+ * Reads Parquet footers in multi-threaded manner.
+ * If the config "spark.sql.files.ignoreCorruptFiles" is set to true, we
will ignore the corrupted
+ * files when reading footers.
+ */
+ private def readParquetFootersInParallel(
+ conf: Configuration,
+ partFiles: Seq[FileStatus],
+ ignoreCorruptFiles: Boolean): Seq[Footer] = {
+ val footers = partFiles.map { currentFile =>
+ new Callable[Option[Footer]]() {
--- End diff --
this seems pretty convoluted. can we jsut use parallel collections to do
this?
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