Github user holdenk commented on a diff in the pull request:
https://github.com/apache/spark/pull/831#discussion_r12822810
--- Diff: core/src/main/scala/org/apache/spark/rdd/RDD.scala ---
@@ -118,8 +118,25 @@ abstract class RDD[T: ClassTag](
// Methods and fields available on all RDDs
//
=======================================================================
+ /** Accessor method which throws a runtime exception if null. This lets
us have
--- End diff --
We would still probably catch the error when it went to use the
SparkContext to call runJob, it would be a bit further down the call stack
though (although I just traced the code and it looks like we would get a null
pointer exception since we have a second accessor method to the internal
sparkcontext called context so I wrapped that access method as well).
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