Github user witgo commented on a diff in the pull request:
https://github.com/apache/spark/pull/44#discussion_r10243090
--- Diff: core/src/main/scala/org/apache/spark/SparkContext.scala ---
@@ -847,6 +847,7 @@ class SparkContext(
partitions: Seq[Int],
allowLocal: Boolean,
resultHandler: (Int, U) => Unit) {
+
require(partitions.toSet.diff(rdd.partitions.map(_.index).toSet).isEmpty,
"partition index out of range")
--- End diff --
class PruneDependency[T](rdd: RDD[T], @transient partitionFilterFunc:
Int => Boolean)
extends NarrowDependency[T](rdd) {
@transient
val partitions: Array[Partition] = rdd.partitions
.filter(s => partitionFilterFunc(s.index)).zipWithIndex
.map { case(split, idx) => new PartitionPruningRDDPartition(idx,
split) : Partition }
override def getParents(partitionId: Int) = {
List(partitions(partitionId).asInstanceOf[PartitionPruningRDDPartition].parentSplit.index)
}
}
Partition will filter out some of here,rdd.partitions.size not correct.
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