Github user witgo commented on a diff in the pull request:
https://github.com/apache/spark/pull/44#discussion_r10194313
--- Diff: core/src/main/scala/org/apache/spark/SparkContext.scala ---
@@ -847,6 +847,8 @@ class SparkContext(
partitions: Seq[Int],
allowLocal: Boolean,
resultHandler: (Int, U) => Unit) {
+ val rddPartitions = rdd.partitions.map(_.index)
+ require(partitions.forall(rddPartitions.contains(_)), "partition index
out of range")
--- End diff --
Do not understand what you mean.
Caused by improper design Partitioner partition index out of range.
val partitioner = new Partitioner {
override def numPartitions: Int = 2
override def getPartition(key: Any): Int = key.hashCode() % 2
}
`partitioner.getPartition(-1)` result -1
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