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https://issues.apache.org/jira/browse/SPARK-7103?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen updated SPARK-7103:
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Component/s: Spark Core
Priority: Minor (was: Major)
> 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
> Components: Spark Core
> Affects Versions: 1.3.0, 1.3.1
> Reporter: Steven She
> Priority: Minor
>
> 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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