Github user mateiz commented on a diff in the pull request:
https://github.com/apache/spark/pull/1502#discussion_r15241580
--- Diff:
core/src/main/scala/org/apache/spark/util/collection/ExternalAppendOnlyMap.scala
---
@@ -252,7 +251,7 @@ class ExternalAppendOnlyMap[K, V, C](
if (it.hasNext) {
var kc = it.next()
kcPairs += kc
- val minHash = getKeyHashCode(kc)
+ val minHash = hashKey(kc)
--- End diff --
Ah, got it, that makes a lot of sense. I actually ran into this problem
before (calling == or hashCode on the (K, C) pair instead of the K).
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