Github user koeninger commented on a diff in the pull request:
https://github.com/apache/spark/pull/3798#discussion_r22364358
--- Diff: core/src/main/scala/org/apache/spark/rdd/RDD.scala ---
@@ -788,6 +788,20 @@ abstract class RDD[T: ClassTag](
}
/**
+ * Applies a function to each partition of this RDD, while tracking the
index
+ * of the original partition.
+ */
+ def foreachPartitionWithIndex(
--- End diff --
The code for actually using the rdd and committing offsets transactionally
is quite awkward without that method, see
https://github.com/koeninger/kafka-exactly-once/commit/cb812c918f724b3ae5e57c66618276b6947ed30d
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