Steven She created SPARK-7103:
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Summary: SparkContext.union crashed when some RDDs have no
partitioner
Key: SPARK-7103
URL: https://issues.apache.org/jira/browse/SPARK-7103
Project: Spark
Issue Type: Bug
Affects Versions: 1.3.1, 1.3.0
Reporter: Steven She
I encountered a bug where Spark crashes with the following stack trace:
{noformat}
java.util.NoSuchElementException: None.get
at scala.None$.get(Option.scala:313)
at scala.None$.get(Option.scala:311)
at
org.apache.spark.rdd.PartitionerAwareUnionRDD.getPartitions(PartitionerAwareUnionRDD.scala:69)
{noformat}
Here's a minimal example that reproduces it on the Spark shell:
{noformat}
val x = sc.parallelize(Seq(1->true,2->true,3->false)).partitionBy(new
HashPartitioner(1))
val y = sc.parallelize(Seq(1->true))
sc.union(y, x).count() // crashes
sc.union(x, y).count() // This works since the first RDD has a partitioner
{noformat}
We had to resort to instantiating the UnionRDD directly to avoid the
PartitionerAwareUnionRDD.
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