diff options
Diffstat (limited to 'core/src')
3 files changed, 23 insertions, 1 deletions
diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala index 86269eac52..ea4ddcc2e2 100644 --- a/core/src/main/scala/org/apache/spark/SparkContext.scala +++ b/core/src/main/scala/org/apache/spark/SparkContext.scala @@ -1055,7 +1055,7 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli /** Build the union of a list of RDDs. */ def union[T: ClassTag](rdds: Seq[RDD[T]]): RDD[T] = { val partitioners = rdds.flatMap(_.partitioner).toSet - if (partitioners.size == 1) { + if (rdds.forall(_.partitioner.isDefined) && partitioners.size == 1) { new PartitionerAwareUnionRDD(this, rdds) } else { new UnionRDD(this, rdds) diff --git a/core/src/main/scala/org/apache/spark/rdd/PartitionerAwareUnionRDD.scala b/core/src/main/scala/org/apache/spark/rdd/PartitionerAwareUnionRDD.scala index 92b0641d0f..7598ff617b 100644 --- a/core/src/main/scala/org/apache/spark/rdd/PartitionerAwareUnionRDD.scala +++ b/core/src/main/scala/org/apache/spark/rdd/PartitionerAwareUnionRDD.scala @@ -60,6 +60,7 @@ class PartitionerAwareUnionRDD[T: ClassTag]( var rdds: Seq[RDD[T]] ) extends RDD[T](sc, rdds.map(x => new OneToOneDependency(x))) { require(rdds.length > 0) + require(rdds.forall(_.partitioner.isDefined)) require(rdds.flatMap(_.partitioner).toSet.size == 1, "Parent RDDs have different partitioners: " + rdds.flatMap(_.partitioner)) diff --git a/core/src/test/scala/org/apache/spark/rdd/RDDSuite.scala b/core/src/test/scala/org/apache/spark/rdd/RDDSuite.scala index df42faab64..ef8c36a286 100644 --- a/core/src/test/scala/org/apache/spark/rdd/RDDSuite.scala +++ b/core/src/test/scala/org/apache/spark/rdd/RDDSuite.scala @@ -99,6 +99,27 @@ class RDDSuite extends FunSuite with SharedSparkContext { assert(sc.union(Seq(nums, nums)).collect().toList === List(1, 2, 3, 4, 1, 2, 3, 4)) } + test("SparkContext.union creates UnionRDD if at least one RDD has no partitioner") { + val rddWithPartitioner = sc.parallelize(Seq(1->true)).partitionBy(new HashPartitioner(1)) + val rddWithNoPartitioner = sc.parallelize(Seq(2->true)) + val unionRdd = sc.union(rddWithNoPartitioner, rddWithPartitioner) + assert(unionRdd.isInstanceOf[UnionRDD[_]]) + } + + test("SparkContext.union creates PartitionAwareUnionRDD if all RDDs have partitioners") { + val rddWithPartitioner = sc.parallelize(Seq(1->true)).partitionBy(new HashPartitioner(1)) + val unionRdd = sc.union(rddWithPartitioner, rddWithPartitioner) + assert(unionRdd.isInstanceOf[PartitionerAwareUnionRDD[_]]) + } + + test("PartitionAwareUnionRDD raises exception if at least one RDD has no partitioner") { + val rddWithPartitioner = sc.parallelize(Seq(1->true)).partitionBy(new HashPartitioner(1)) + val rddWithNoPartitioner = sc.parallelize(Seq(2->true)) + intercept[IllegalArgumentException] { + new PartitionerAwareUnionRDD(sc, Seq(rddWithNoPartitioner, rddWithPartitioner)) + } + } + test("partitioner aware union") { def makeRDDWithPartitioner(seq: Seq[Int]): RDD[Int] = { sc.makeRDD(seq, 1) |