CoalescedRDD changed to work with a big number of partitions both in the original and the new coalesced RDD.

The limitation was in the range that Scala.Int can represent.

1 files changed, 2 insertions, 2 deletions

diff --git a/core/src/main/scala/spark/rdd/CoalescedRDD.scala b/core/src/main/scala/spark/rdd/CoalescedRDD.scala
index 0d16cf6e85..6d862c0c28 100644
--- a/core/src/main/scala/spark/rdd/CoalescedRDD.scala
+++ b/core/src/main/scala/spark/rdd/CoalescedRDD.scala
@@ -37,8 +37,8 @@ class CoalescedRDD[T: ClassManifest](
       prevSplits.map(_.index).map{idx => new CoalescedRDDPartition(idx, prev, Array(idx)) }
     } else {
       (0 until maxPartitions).map { i =>
-        val rangeStart = (i * prevSplits.length) / maxPartitions
-        val rangeEnd = ((i + 1) * prevSplits.length) / maxPartitions
+        val rangeStart = ((i.toLong * prevSplits.length) / maxPartitions).toInt
+        val rangeEnd = (((i.toLong + 1) * prevSplits.length) / maxPartitions).toInt
         new CoalescedRDDPartition(i, prev, (rangeStart until rangeEnd).toArray)
       }.toArray
     }