Github user CodingCat commented on a diff in the pull request:
https://github.com/apache/spark/pull/44#discussion_r10241868
--- 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 partitionRange = (0 until rdd.partitions.size)
+ require(partitions.forall(partitionRange.contains(_)), "partition
index out of range")
--- End diff --
two questions
1. Does the Spark guarantee that RDD has continuous partition index? (I
think so, as https://spark-project.atlassian.net/browse/SPARK-911 is still
there)
2. Shall we put the check here or we want to check inside the specific
APIs, (the current issue looks more like a bug in lookup() - forget to check
the return value of getPartition before using it....)
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