Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/7403#discussion_r39082075
--- Diff: core/src/main/scala/org/apache/spark/rdd/PairRDDFunctions.scala
---
@@ -103,13 +105,48 @@ class PairRDDFunctions[K, V](self: RDD[(K, V)])
}
/**
- * Simplified version of combineByKey that hash-partitions the output
RDD.
+ * This method is here for backward compatibility. It
+ * does not provide combiner classtag information to
+ * the shuffle.
--- End diff --
The java doc should start with a description of what the method does. We
should use the old one and add that it exists backward compatibility after the
first sentence.
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