Github user watermen commented on a diff in the pull request:
https://github.com/apache/spark/pull/7536#discussion_r36378157
--- Diff: core/src/main/scala/org/apache/spark/rdd/CoalescedRDD.scala ---
@@ -295,7 +295,15 @@ private class PartitionCoalescer(maxPartitions: Int,
prev: RDD[_], balanceSlack:
val r1 = rnd.nextInt(groupArr.size)
val r2 = rnd.nextInt(groupArr.size)
- val minPowerOfTwo = if (groupArr(r1).size < groupArr(r2).size)
groupArr(r1) else groupArr(r2)
+ val minPowerOfTwo = if (p.isInstanceOf[HadoopPartition]) {
+ val groupLen1 = groupArr(r1).arr.map(part =>
+ part.asInstanceOf[HadoopPartition].inputSplit.value.getLength).sum
+ val groupLen2 = groupArr(r1).arr.map(part =>
--- End diff --
@hellertime Yes, I'll fix this bug, thanks.
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