Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/1791#discussion_r15955661
--- Diff: python/pyspark/rdd.py ---
@@ -737,6 +754,19 @@ def _collect_iterator_through_file(self, iterator):
yield item
os.unlink(tempFile.name)
+ def collectPartitions(self, partitions):
--- End diff --
It will help for debug, you can collect parts of the RDD to investigate
with them.
It also be helpful if we have an API called slice(start, [end]) to select
parts of the partitions. DPark has this kind of API, it help us a lot, Narrow
down the data to do fast debugging.
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