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[SPARK-7466] DAG visualization: fix orphan nodes #6002

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[SPARK-7466] DAG visualization: fix orphan nodes #6002

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2 changes: 1 addition & 1 deletion core/src/main/scala/org/apache/spark/ui/scope/RDDOperationGraph.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -101,7 +101,7 @@ private[ui] object RDDOperationGraph extends Logging {
val node = nodes.getOrElseUpdate(
rdd.id, RDDOperationNode(rdd.id, rdd.name, rdd.storageLevel != StorageLevel.NONE))

if (rdd.scope == null) {
if (rdd.scope.isEmpty) {
// This RDD has no encompassing scope, so we put it directly in the root cluster
// This should happen only if an RDD is instantiated outside of a public RDD API
rootCluster.attachChildNode(node)
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