set PartitionsRDD to be transient in EdgeRDDImpl and VertexRDDImpl

Author: JerryLead

graphx/src/main/scala/org/apache/spark/graphx/impl/EdgeRDDImpl.scala

@@ -26,7 +26,7 @@ import org.apache.spark.storage.StorageLevel
 import org.apache.spark.graphx._
 
 class EdgeRDDImpl[ED: ClassTag, VD: ClassTag] private[graphx] (
-    override val partitionsRDD: RDD[(PartitionID, EdgePartition[ED, VD])],
+    @transient override val partitionsRDD: RDD[(PartitionID, EdgePartition[ED, VD])],
     val targetStorageLevel: StorageLevel = StorageLevel.MEMORY_ONLY)
   extends EdgeRDD[ED](partitionsRDD.context, List(new OneToOneDependency(partitionsRDD))) {
 

graphx/src/main/scala/org/apache/spark/graphx/impl/VertexRDDImpl.scala

@@ -27,7 +27,7 @@ import org.apache.spark.storage.StorageLevel
 import org.apache.spark.graphx._
 
 class VertexRDDImpl[VD] private[graphx] (
-    val partitionsRDD: RDD[ShippableVertexPartition[VD]],
+    @transient val partitionsRDD: RDD[ShippableVertexPartition[VD]],
     val targetStorageLevel: StorageLevel = StorageLevel.MEMORY_ONLY)
   (implicit override protected val vdTag: ClassTag[VD])
   extends VertexRDD[VD](partitionsRDD.context, List(new OneToOneDependency(partitionsRDD))) {