Github user dongjoon-hyun commented on a diff in the pull request:
https://github.com/apache/spark/pull/15741#discussion_r86382197
--- Diff:
core/src/main/scala/org/apache/spark/util/collection/OpenHashSet.scala ---
@@ -271,8 +271,12 @@ class OpenHashSet[@specialized(Long, Int) T: ClassTag](
private def hashcode(h: Int): Int =
Hashing.murmur3_32().hashInt(h).asInt()
private def nextPowerOf2(n: Int): Int = {
- val highBit = Integer.highestOneBit(n)
- if (highBit == n) n else highBit << 1
+ if (n == 0) {
+ 2
--- End diff --
Oh, sorry. You're right. `nextPowerOf2(1)` is indeed 1. Then, both should
return 1.
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