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  1. Spark
  2. SPARK-1931

Graph.partitionBy does not reconstruct routing tables

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 1.0.0
    • Fix Version/s: 1.0.1
    • Component/s: GraphX
    • Labels:
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      Description

      Commit 905173df57b90f90ebafb22e43f55164445330e6 introduced a bug in partitionBy where, after repartitioning the edges, it reuses the VertexRDD without updating the routing tables to reflect the new edge layout. This causes the following test to fail:

            import org.apache.spark.graphx._
            val g = Graph(
              sc.parallelize(List((0L, "a"), (1L, "b"), (2L, "c"))),
              sc.parallelize(List(Edge(0L, 1L, 1), Edge(0L, 2L, 1)), 2))
            assert(g.triplets.collect.map(_.toTuple).toSet ==
              Set(((0L, "a"), (1L, "b"), 1), ((0L, "a"), (2L, "c"), 1)))
            val gPart = g.partitionBy(PartitionStrategy.EdgePartition2D)
            assert(gPart.triplets.collect.map(_.toTuple).toSet ==
              Set(((0L, "a"), (1L, "b"), 1), ((0L, "a"), (2L, "c"), 1)))
      

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            • Assignee:
              ankurd Ankur Dave
              Reporter:
              ankurd Ankur Dave
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              • Created:
                Updated:
                Resolved: