Github user mateiz commented on a diff in the pull request:
https://github.com/apache/spark/pull/16#discussion_r11323529
--- Diff:
extras/java8-tests/src/test/java/org/apache/spark/Java8APISuite.java ---
@@ -246,6 +246,24 @@ public void mapPartitions() {
}
@Test
+ public void mapPartitionsWithIndex() {
+ JavaRDD<Integer> rdd = sc.parallelize(Arrays.asList(1, 2, 3, 4), 2);
+ JavaRDD<Integer> partitionSums = rdd.mapPartitionsWithIndex((start,
iter) -> {
+ List<Integer> list = new ArrayList<Integer>();
+ int sum = 0;
+ int pos = start;
+ while (iter.hasNext()) {
+ sum += (pos* iter.next());
+ pos += 1;
+ }
+ return list.iterator();
+ });
+ Assert.assertEquals(0, rddByIndex.first().intValue());
+ Integer[] values = {0, 2, 6, 12, 20};
+ Assert.assertEquals(Arrays.asList(values), rddByIndex.collect());
--- End diff --
Actually this test is just broken as is, there's no `rddByIndex` variable.
You have to run it on Java 8, otherwise SBT will not build this project.
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