Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/9610#discussion_r44742645
--- Diff:
core/src/main/scala/org/apache/spark/shuffle/IndexShuffleBlockResolver.scala ---
@@ -75,13 +81,68 @@ private[spark] class IndexShuffleBlockResolver(conf:
SparkConf) extends ShuffleB
}
/**
+ * Check whether there are index file and data file also they are
matched with each other, returns
+ * the lengths of each block in data file, if there are matched, or
return null.
+ */
+ private def checkIndexAndDataFile(index: File, data: File, blocks: Int):
Array[Long] = {
+ val lengths = new Array[Long](blocks)
+ if (index.length() == (blocks + 1) * 8) {
+ // Read the lengths of blocks
+ val f = try {
+ new FileInputStream(index)
+ } catch {
+ case e: IOException =>
+ return null
+ }
+ val in = new DataInputStream(new BufferedInputStream(f))
+ try {
+ // Convert the offsets into lengths of each block
+ var offset = in.readLong()
+ if (offset != 0L) {
+ return null
--- End diff --
```
// first offset should be 0
return null
```
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