Github user pwendell commented on a diff in the pull request:
https://github.com/apache/spark/pull/1535#discussion_r15324267
--- Diff: core/src/main/scala/org/apache/spark/rdd/RDD.scala ---
@@ -1269,6 +1269,19 @@ abstract class RDD[T: ClassTag](
/** A description of this RDD and its recursive dependencies for
debugging. */
def toDebugString: String = {
+ // Get a debug description of an rdd without its children
+ def debugSelf (rdd: RDD[_]): Seq[String] = {
+ import Utils.bytesToString
+
+ val persistence = storageLevel.description
+ val storageInfo = rdd.context.getRDDStorageInfo.filter(_.id ==
rdd.id).map(info =>
--- End diff --
Ah sorry, yeah I mean this very costly. I'd rather not do this in a debug
function - because people will do things like print debug statements inside of
loops. In that case the debugging will significantly alter the performance of
their application. There is a separate JIRA to make this function faster (it's
a function also used in the UI), but until that's fixed I'd rather not call it
here:
https://issues.apache.org/jira/browse/SPARK-2316
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