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[SPARK-25268][GraphX]run Parallel Personalized PageRank throws serialization Exception #22271

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[SPARK-25268][GraphX]run Parallel Personalized PageRank throws serialization Exception #22271

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8 changes: 5 additions & 3 deletions graphx/src/main/scala/org/apache/spark/graphx/lib/PageRank.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -198,9 +198,11 @@ object PageRank extends Logging {

val zero = Vectors.sparse(sources.size, List()).asBreeze
// map of vid -> vector where for each vid, the _position of vid in source_ is set to 1.0
val sourcesInitMap = sources.zipWithIndex.toMap.mapValues { i =>
Vectors.sparse(sources.size, Array(i), Array(1.0)).asBreeze
}
val sourcesInitMap = sources.zipWithIndex.map { case (vid, i) =>
val v = Vectors.sparse(sources.size, Array(i), Array(1.0)).asBreeze
(vid, v)
}.toMap

val sc = graph.vertices.sparkContext
val sourcesInitMapBC = sc.broadcast(sourcesInitMap)
// Initialize the PageRank graph with each edge attribute having
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