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SPARK-1577: Enabling reference tracking by default in GraphX KryoRegistrator. #499

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SPARK-1577: Enabling reference tracking by default in GraphX KryoRegistrator. #499

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9 changes: 6 additions & 3 deletions graphx/src/main/scala/org/apache/spark/graphx/GraphKryoRegistrator.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,12 @@ import org.apache.spark.util.BoundedPriorityQueue

/**
* Registers GraphX classes with Kryo for improved performance.
*
* If possible disable Reference tracking in Kryo (not safe in the Spark-Shell).
* Reference tracking can be disabled by following the instructions here:
*
* http://spark.apache.org/docs/latest/configuration.html
*
*/
class GraphKryoRegistrator extends KryoRegistrator {

Expand All @@ -41,8 +47,5 @@ class GraphKryoRegistrator extends KryoRegistrator {
kryo.register(classOf[PartitionStrategy])
kryo.register(classOf[BoundedPriorityQueue[Object]])
kryo.register(classOf[EdgeDirection])

// This avoids a large number of hash table lookups.
kryo.setReferences(false)
}
}